XR100 CR80 motor swap

In this video we take a Honda XR 100 motorcycle engine and install it into a CR80 big wheel. It was a fun project, a bit time consuming, but well worth it seeing my nephew having fun on his new bike!

[@BernhardHofmann]

"What your time is worth"... They're missing the point. Think of all the things you learnt and taught - priceless indeed. Thank you for another great video.

[@Mikefestiva]

Thanks Bernhard for your nice comments :) You get what it's about. Thanks for checking out our bike build video!

[@chrischopko1637]

Everybody needs an uncle like this guy! Amazing job on the build

[@Mikefestiva]

Chris Chopko haha Thanks for your Great comment! Take care :)

[@turbolq4]

Perfect bike for advanced beginners and small framed adults ( ladies)!! The great usability of the XR engine in a chassis with real suspension,light weight, and disc brakes. Perfect play bike, nice work! Don't mind the blowhards that are putting this down. They obviously haven't tried to ride an 80cc MX bike at altitude on some ugly singletrack. They flat don't work.

[@jademoreton8371]

motocross pros and legends put old xr80r or xr100r motors into cr80rs for pit bikes and fun minis back in the 80s.cool build

[@Mikefestiva]

Thanks for commenting! I do remember years ago seeing articles in dirt rider and other magazines about this motor swap. It was a fun build and my nephew rips it around all the time :) Take care

[@raymondedwards54]

Hell of a job dude. Props on the build from another rider/fabricator!

[@Mikefestiva]

Raymond Edwards Thanks I appreciate it! It’s nice to hear a nice comment. My nephew has been really having fun with this bike. I’m glad you enjoyed the video :)

[@vwmetal66]

Really enjoyed the video. Seeing the build, the outcome and finally the payoff must have been very gratifying. I'm glad your nephew enjoyed the bike. I like the idea of having the better suspension and styling of a race bike with the simplicity and bulletproof engine of the XR100

[@scottbozarth8459]

Sick. Sick. Sick. Proof that with some patience and ingenuity, a fella can build just about anything. Next build a submarine out of a CR250r.

[@johannej3241]

Awesome work. It’s obvious the gentleman knows fabrication/ machining work. So it’s the challenge that drives him to do it.He enjoyed the whole build as mush as the kid riding and ripping that thing. Kudos to sir. Don’t worry about people couldn’t fathom the idea or concept of the project, most likely they couldn’t glue popsicle stick together. Sorry for my English 2nd language here.

[@Mikefestiva]

I really appreciate your great comment! I’m glad you liked our motorcycle project :) my Nephew learned a lot from helping and I think he appreciates it more when out riding, because he put his time into the build. Thanks again! Ps your English is fantastic, where do you live?

[@johannej3241]

I’m Filipino/Spanish decent, live in Portland OR a few years.I live in Florida now due to family and work. Thanks

[@Mikefestiva]

Johanne Jamora Tile Works Right on, I’m up in Washington on the Olympic peninsula. Portland’s a good place, but Florida is much warmer. Take care

[@Gabrielsmusic]

That's actually the best thing you could ride on the trails! i love it. I have a crf230, and a kx100 for 2 different reasons; mx and trail. I'd love mx suspension on the 230, and the kx is great except no torque. You have made the best of both worlds for cruising!

[@Mikefestiva]

G Nasty You completely understand this build! Right on :) it’s been a real good trail bike for my nephew. I would have loved to own a bike like this when I was his age, I just had a stock xr 100 and it was nothing compared to this bike. Thanks for commenting and checking out our project!

[@dickeredrides1261]

Xr best for cluch wheelis

[@BarnStangz]

Turned out awesome! Time well spent I think. People need to understand, that if you can take on a project like this, esp. with another family member, then go for it! It's an amazing way to share knowledge and just fun! ...and talk about light years better suspension! Man, back in the day when I had an XR 80, I'd push that thing so hard it would BITE back! Big wheel is perfect for this! That little 100 single is as bullet proof as they get too, keep an eye on valves and timing chain and it'll last a long time. Really have been enjoying your vids, thank you again for sharing!

[@Mikefestiva]

Thanks it’s nice when people like yourself get this build, it was good times working with my nephew, and we got a great bike out of it! Thanks for commenting :) ps I’m going to check out those log splitters on your channel

[@BarnStangz]

@@Mikefestiva Thanks man! Yeah, I totally get it and I'm sure I'm not alone on that... Building and fixing stuff for me (and you I'm sure) is sometimes the therapy we need and time well spent!

[@StinkPhist]

This is awesome! Well done! The best part is your nephew is learning important skills. Exercising his mind and not his thumbs like most teens, good on you!

[@Mikefestiva]

Thank you! Yes it’s good to get kids out in the shop working on things, like you mentioned a lot of kids spend there time indoors playing video games now 😐 I was just out working in my shop with my nephew last night, I gave him a old Honda CB 200 cafe style street bike and he is starting to do some mods to it. Take care

[@tannerarant1680]

Great job, looks like a fun little ripper

[@trevorjameson3213]

Awesome build! I would love to have my CRF100 in a CR80 frame, man that would be cool, with the great suspension of the CR.

[@internalbeats6870]

Awesome job bro and great video. Thanks for putting it all together for us!!

[@Mikefestiva]

Thanks for checking out our project!!!

[@SSYoung125]

I have the biggest problem helping my brother pick out his first dirt bike because he wants a full size frame not to feel awkward on the bike but a full size frame comes with an engine that's too powerful I never once thought about making my own bike/ motor swap. Good final result

[@davidfirth6535]

Great job well done, what a cracking little bike, regards, David.

[@Mikefestiva]

Thanks!

[@connorm430]

Awesome build! Really inspires me to finish doing the fab work on my DRZ

[@Mikefestiva]

Right on thanks for checking out my video 👍 yes get your bike finished for the Summer man 😊

[@JonSmith-mz2rt]

Just watched this and love it.. a new lease of life for a little old cr, I totally understand why you done this.. it may not scream out revs but I bet the torque is sweet. Hey I have an old motocross action mag somewhere from years ago bbr put an xr100 motor in a yz80 or kx80 but used a head from a jet ski and it took that thing to 180cc, I dont know how well it worked but I'd imagine it was incredible

[@NorthEastMX]

I have wanted to build a similar swap for a long time. Thanks for this great video. Awesome tips and info !!

[@Mikefestiva]

Thanks for checking out my video 👍 It’s nice to get a positive comment on this video, I have had some hate because I took a old locked up 2stoke and made it into a good working woods bike for my nephew. Take care 🙂

[@michaelshallett6665]

Very nice job... I enjoy the craftsmanship ... and there's nothing like bringing old iron back to life

[@Mikefestiva]

Thanks Michael :)

[@TheNewps]

Awesome job, that thing is sick and will run forever. I want to do that to my daughter's bike but she keeps growing too fast...:).

[@Mikefestiva]

Thanks for checking out our project! I know what your talking about, my nephew probably will out grow his bike this year, but his younger brother will be getting a awesome bike to grow into. Take care :)

[@PaulioMaldinio]

Just a better frame and forks all round. Great video. Thanks for sharing

[@awalker8112]

This was awesome. I have a couple XR 100's. Looks like a good project for me. Thanks

[@Mikefestiva]

Nice 👍

[@SUPERDUCKcromobe]

I like the idea of this project that made a great bike. Way better than an over tuned 2 stroke for your application. And awesome suspension.

[@Mikefestiva]

Thanks, I’m glad you completely understand our build! There’s been quite a few that cannot comprehend why we would choose to go for more low and mid range torque over peak HP. We have muddy tight trails up in the Pacific Northwest (the land of rain) so this bike with that motor, great suspension and brakes are a awesome combination. Thanks and I appreciate your comment. :)

[@mrmikemanify]

I got an xr200r motor laying around. Just waiting for the perfect blown up bike deal to show up!

[@cxbra]

I just bought a crf70 with a CR85 motor swap and its insaneee. It has the whole CR85 cradle welded to the 70 neck. The fabricator really did it right but needed it gone, I got it for $480! The whole bike fits in the back of my hatchback, its going to be a crazy summer!

[@Mikefestiva]

Nice 👍 you are going to have some fun on that bike!

[@dominyadonahue9526]

still have?

[@issaacxxx6202]

Pleassseee do a video with it! I'd love to see it rip lol

[@trevorjameson3213]

Very cool, nice job! The bike sounds great and looks like it runs great too. Great choice putting the four-stroke in the CR80 frame; tons more low end torque and that is what's useful for trail riding. I've always been a fan of the Honda XR's. I bought my XR250R new in '99 and still ride it regularly. And who cares if it took a lot of time and effort to build. That's a big part of the fun is building a project.

[@Mikefestiva]

Trevor Jameson Right on, Thanks for your comment! It’s been a great bike, my nephew is really happy with it 🙂 I had a XR 250 years ago, great bike! I now have a Xr 650l, it’s a bit of a pig on the trails but is a fun bike for loading up my camping gear and heading out on camping trips. Take care!

[@squeezethetrigger4135]

I agree with Trevor on his comments. I love the old xr line. I had to sell my xr650L last year, I really miss that bike, I sold it to a buddy and he loves it. I like your projects, because you come up with a concept and make it happen. It doesn't matter if it makes sense to those nay sayers out there, its a challenge to do it, thats what set you apart. I just discovered your channel today and am really enjoying your videos. Thanks. Keep up the good work. I also would love to see more videos of you guys riding, maybe take an adventure ride. Rock On.

[@Mikefestiva]

Squeeze The Trigger Thank you for taking the time to comment, I appreciate it! That’s to bad you had to sell off your 650L at least there’s plenty of them out there if you decide to get another one someday. My friend and my brother both have 650L s I have traveled many miles on mine 🙂 I’m glad you found my channel, it’s always nice when someone like yourself enjoys my video and takes the time to check out some of my other videos as well, Thanks! I always like hearing input on what subscribers want to see. I will post some trail rides this winter, and I’m sure my friends and I will take the 650L s out on a trip this next spring. Take care 🙂

[@urbanburbanadventure7124]

awesome bike man something like me and my dad would build together. There's always going to be haters or someone trying to get a reaction but it's cool that you're spending time with your family building awesome toys.

[@Mikefestiva]

Thanks I really appreciate your comment 🙂 yes we had a good time building this bike and he is still getting a lot of use out of this bike, soon it will be past down to his younger brother. Take care

[@nwhuckin7761]

Nice one Mike! Perfect long travel xr 100. I actually just picked up a 2002 xr 100 to put around the yard with my two kids on their little electric dirt bikes. Looks like you guys had a nice little snow ride up on dry hill and the footies. Cheers~

[@Mikefestiva]

Thanks for checking out our project! Your kids will have a blast riding around with there dad! those are memories they will remember :) My son is 16 months old now, and his uncle Andy gave him a Yamaha PW50, He's still a long ways off from riding it himself but he loves when I cruising him around the yard! Take care

[@williamwhittaker5447]

Nice to see someone taking pride in their work today..

[@timcoppinger3373]

I’m impressed. Worth the effort I say. Well done.

[@muddpuppie226]

Awesome job man. That’s a lot of work.

[@Mikefestiva]

Thank you! I appreciate it :)

[@vintagekyoshodotcom]

That's awesome! I just found your video. I want to put a KLX140 motor in my YZ80 chassis. One thing you never brought up is how the sprocket alignment to the rear sprocket was done. That's a very important piece as it needs to be aligned perfectly. Thanks for the video. Looking forward to a follow up!

[@Mikefestiva]

Thanks for checking out my video 👍 The chain alignment isn’t very hard to do, just look it over and use some skinny flat bar as a straight edge and align it from sprocket to sprocket. Also make sure you can try and get your front sprocket centered in front of the swing arm pivot point, this will help keep the chain from changing tension throughout the suspension cycle 👍

[@firespittingproductions6601]

Wow this is really cool even though I’m four years late nice job wickeddddd!!!

[@joshuwahhhh7404]

Wish I was this techy, I'd do this stuff all the time. Cool way to save some cash and use that sweet frame and suspension.

[@Mikefestiva]

Thanks Joshua! It’s definitely a fun little bike, my nephew rips it all around still, but he has grown so fast that he will be passing it down to his younger brother soon. Ps I just started to work on the old XR100 left over frame. It’s going to be a fun simple motor swap to bring that old frame back for some trail fun again, so keep an eye out for that video soon! Take care :)

[@joshuwahhhh7404]

@@Mikefestiva Sweet! I will check it out. I just started getting a 06 crf100f back from storage and love the small bikes especially for the kiddos 11 and 12 but I still love riding the small cc bikes its great fun up rocks and mountain terrain where you can whip it around and really use the low gear 4 sttoke power. 1st gear is a lot of fun it's like a granny gear in the older Chevy 4x4.

[@sethjeffreys3055]

Great job ! I love doing conversions ive got a 2001 yz 125 frame fixing to get a 220 kdx engine or maybe a 350 twin banshee engine.

[@Mikefestiva]

Thanks for commenting! That sounds like a fun bike project your working on, I hope you post a video of it! I would love to see it :) take care

[@patnaty]

Nice craftsmanship in that shop

[@carsonmiller9658]

I started on an XR80 and moved right on up to a yz 85 in the same month he could definetly handle the 2 stroke if he is skilled enough

[@maultsmayhem2578]

I bought an 2003 cr85 for my son to do the same thing. Ended up just swapping xr100 suspension on a crf80 then putting cr80 rear shock on. It's awesome. Just need an xr100 engine. Awesome video thanx

[@MWhite-dv1uu]

Cr80 suspension bolt on to the xr frame?

[@Maults_Mayhem]

@@MWhite-dv1uu yeah from 1980-1986 front forks. 1986 being the best cause they switched from drum to disc brakes. You have to get the "All BALLS crf50 head tube taper bearings". The swing arm from the xr100 bolted right on but I had to cut the rear shock mount and relocate it. All the way up as high as it could go in the frame. I used the mount that I cut off of the frame. Xr crf80 frame is the best to use way less of a head tube angle. The xr100 xr80 are all interchangeable. there is a bunch of threads on this on thumper talk.

[@MWhite-dv1uu]

@@Maults_Mayhem I've been looking trying to figure out what's feasible. I've got a 99 xr80 and a 1996 cr80r (with a scored cylinder)

[@Maults_Mayhem]

@@MWhite-dv1uu I went with what would be best for the kids. My son has a cr85 but having the xr80 all tricked up has been awesome for the kids. Every time I go to the track my son makes a friend and they end up riding the xr. It's a mellow motor with suspension. The xr100 swing arm is the same length as the cr80 and the cr85 swing arm.

[@rileymassie1369]

Love the build man!!!

[@Mikefestiva]

Thanks! I appreciate that :)

[@YaseenAli-zn9ej]

I love how the cr80 is soo loved

[@bhop1337]

Good job on the swap man! xr100 are a great engine that are way more ridable then an 80 2 stroke especially for a kid that not using all the top end power. People who have ridden both types of bikes understand why people do the conversion.

[@Mikefestiva]

bhop Thanks for your nice comment! It’s nice to know some people like your self get this bike build :) Take care and thanks for checking our project out!

[@dickeredrides1261]

I had my xr 100 for 2years and haven't rebuilt it I rod it almost every day except for winter it's just my pitbike know but so easy to wheely

[@acuraintegrar5]

Thats pretty sweet! reminds me of when bbr built a bike like this. I cant remember the specs but it was pretty sick back then!

[@Mikefestiva]

Right on! Yes this swap was fairly popular years ago but now days most younger people have no idea about it. Thanks for commenting 🙂

[@andrewhart9941]

Sounds good, healthy lil 120

[@boonedalton6201]

Used to trail ride out by elbe when i lived in lacey, awesome country, not sure where you were but always beautiful no matter where you are in washington..

[@Mikefestiva]

Thanks for checking out our bike build Boone! We are out in Western Washington :)

[@patnaty]

Love to see it on a race track fun bike for sure love it

[@charvisgl]

Great video I just became a subscriber great job on a four-wheel truck to that's pretty cool

[@Mikefestiva]

Thanks! I appreciate your comment and that you subscribed! Take care

[@tylerseely]

Great video! I only ride street bikes but this video made me want to buy a trail bike. For 80cc's that thing does really well! Hope to see more videos like this one in the future.

[@Mikefestiva]

Right on!!! This bike is a lot of fun for my nephew, I'm glad we built it for him. It's got a 120cc high compression kit with a bigger carb, cam and exhaust, so it's got a few extra ponies in it :) What kind of street bike do you own? I had two street bikes but I gave my nephew a old 72 Honda CB200 twin that I modified, but I still have a old 73 Honda CB350 four, It's not crazy fast but it does sound amazing at 10,000 RPMs :) Thanks for watching.

[@tylerseely]

Mike festiva Currently a 97 Yamaha Virago 750 but thinking about getting a xl650l so I can commute and also hit up the hills on the weekends.

[@Mikefestiva]

I have a 97 XR650L they are great bikes! My brother and two of my friends also own them. I have taken mine loaded down with tools and camping gears from Western Washington into Idaho and Montana many times, It's never let me down on any trip. It's a great way to get out and explore the back roads and trails, It's held up going 75 to 80MPH all day on the highway, going over 10,000 foot passes on motorcycle trails in the mountains. My brother took his down into Baja last fall and rode a lot of dunes and his did great, I guess what I'm getting at is there great all around bikes, maybe a bit heavy but fully capable of doing most things :) PS get one :)

[@tylerseely]

Mike festiva XR not XL! Thanks for that. I live in Boise but grew up in Coeur d'Alene and there are so many places to ride in our neck of the woods. You might have convinced me!!!

[@tylerseely]

Mike festiva I have one question about your XR. Have you heard of anyone having issues with the top-ends on these motors? That seems to be the only issue that I’ve ever really heard about regarding these bikes.

[@MeGuess_Adventures]

Sweet, I’ve got a 2005 CR 85. I’m thinking about doing a swap with.

[@rowangrayvlogs5355]

Hard to watch a 2stroke get turned to a 4stroke, but better than seeing a bike get parted out, nice build.

[@Mikefestiva]

Rowan Gray Vlogs haha I know some people are really into 2 strokes, I like them too but this bike really got messed up from the previous owner, we bought it with a locked up crack and sat for 5 years with the spark plug out.

[@rowangrayvlogs5355]

Mike festiva yeah hearing That makes it make a lot more sense, and the xr100 motor surprised me in the video, it was honestly pretty powerful. Very nice build.

[@dirtshart]

But thats a 4 stroke that was a underdog bike like two strokes. I call them old world four strokes.

[@BenGallou]

Wonderful build!

[@Mikefestiva]

Thanks Ben! It’s nice to have a comment on this video where someone actually understands and likes what we built. Take care :)

[@nyc_road_glide331]

Amazing. If I was that kid I would never get rid of that bike

[@Logjam5]

For you younger folks, that was the voice of William Conrad in the advertisment. Great vid on the build: WHAAAAA...WHAAAAAA... WHaaaaa. Sweet place to ride; mountains, ocean, timber - hard to beat that!

[@Mikefestiva]

Thanks for checking out our project! We do have some great places to ride, plus the snow is seldom in the lower foot hills around here so you can ride about 11 months of the year, that is as long as you can handle some mud in the winter months :) Take care

[@gavinmcvey8177]

Good job but round pipe is better u can slip a wee bit of tube inside it for strength 😎😎😎sounds good good project 😀😀

[@deepbludude4697]

You should repower the now empty XR frame with a $100.00 side shaft motor, I know the purist will flame you but I love seeing and doing builds like this, that is if your looking for new projects haha...I appreciate the time and effort required to not only design and fabricate these builds but to video them and upload!

[@Mikefestiva]

Thanks I appreciate your comment! Especially the part about taking the time and effort to video and post these kinds of projects, man out of almost 2 million views and thousands of comments on my channel I have only had a hand full of people ever really acknowledge the amount of extra effort it takes to not only finish a build but to also make a video of it for KZbin. Thanks you! Take care :)

[@deepbludude4697]

Mike, I hear you I just don't have the patience, bandwidth, camera skills and editing skills to upload videos, not to mention my distraction issues haha your time is definitely appreciated.@@Mikefestiva

[@vinmangt]

Great video. I should have done the same thing for my daughter. I rebuilt the CR80 and that 2 stroke with no torque and insane pwr band intimidates her.

[@Mikefestiva]

vinmangt The little 80cc 2 strokes can be a bit crazy with no low end and real peaky top end! One thing that can help a bit with the low end torque is adding a flywheel weight. It’s not going to transform it completely but does help it out for trail riding. Thanks for checking out our project 🙂

[@vinmangt]

I run a 10oz on my 01 cr250. But she is overwhelmed by a 2 stroke in general.

[@MWhite-dv1uu]

Would gearing it down help or just make it worse?

[@Propaniac-ru5yf]

I really like this! It's not my money so not my business so who cares it's probably a super fun little bike and well worth the time invested in it, I would just get an xr 200 but that's me and this is cooler

[@endurotruckererniedesjardins]

I like this idea, awesome rolling chassis with a rock solid engine that will run till the end of time. My wife rides a xr100 and soon she'll start to want s better bike. Shes tiny so a big bike ain't a option. I do have a line on a cheap cr85 expert with big wheel kit. Hmmm lol

[@Mikefestiva]

Thanks for checking out our project! It’s been a great bike 🙂 I’m glad you get this build, I’m really surprised how many people can’t understand this bike and why we built it. I think a bike like this would be great for your wife. Take care

[@endurotruckererniedesjardins]

@@Mikefestiva thinkin,,, crf150f trail bike engine would be a good choice. Electronic start would be sweet. I totally get the build, I like to build what I drive, I lift my trucks, mod my stuff for me. My toy is a 88 bronco on f350 straight axles, 408 stroker Windsor, np435 4spd, welded diffs, off rd bumpers, deaver desert long travel leafs of back n coils up front, sits on 39.5 tsl up front and 18x39.5x15 boggers on the rear. I daily drive it often.

[@reddogdigital7538]

rad swap. nice work!

[@Zzeke]

Awesome job.

[@xnotx2]

Found the video! :P Awesome job. I'm so jelly of the riding area! Been living here in PA for about 8 years now and I hate it lol Dirt bikes are essentially illegal here, you cannot register them for use on state land because they won't even title a "Dirt bike". They have no problems titling a vintage 3 wheeler....but nope, no two wheel dirt bikes *@$&#% I'm leaving this state in a few years and am honestly heavily considering Washington.

[@alexanderknapp319]

What a brilliant video

[@Mikefestiva]

Thanks 😊

[@evie8143]

Nice job !

[@Mikefestiva]

Thank you :)

[@williampeckham9838]

I used to see that alot back in the day. I never understood why people wanted to downgrade. Unless you had a rolling chassis ofcourse.

[@jeffjones4071]

Nice build

[@Mikefestiva]

Thank you :) my nephew it still having fun with it, but he’s getting close to moving up to maybe a KTM or kdx 200. Then this bike will be passed down to his little brother :) Thanks for checking out our project!

[@rickyfg17]

Nice job I like it

[@p.t.anderson1593]

Looks like some good riding places. I've probably been there or nearby. Is that up by Walker Valley? Do you know the Dirty Mountain Goats? It would be cool to, figuratively speaking, bump into you out on the trails someday.

[@myalsdobie6995]

Great video I own several bikes including a 96 cr80 with a borekit. And I have a friend with a xr100 for a pitbike. Mines obviously faster but. Both are amazing and do there jobs so well with no problems, but I like mine more mainly cause it’s a 2 stroke but that’s just a opinion. Again great video.

[@Mikefestiva]

Rc Redneck Thanks for checking out our bike build! I would have liked to try out the CR80 with the stock 2 stroke but we bought it knowing the crank was seized, it was just bought for the rolling frame, it is amazing the top end power on those small 2 strokes!!! Take care and thanks for commenting :)

[@datkid8563]

But good job it takes a good amount of skill to do stuff like that

[@paxtonspeed]

Awesome man!

[@Mikefestiva]

Thanks!

[@dutchschultz3076]

AWSOME& EDUCATIONAL! THX

[@Mikefestiva]

Right on! I'm glad you enjoyed our project, I figured if we were going to build it we mine as well post a video on how we went about it. Thanks for watching :)

[@acuraintegrar5]

Hey mike watched this vid a long time ago but just revisited it. This was a great vid! So what did you do to mount the motor to the swing arm? Was that the white bracket on the back of the motor? I wanna start collecting parts now to build my son one when he gets bigger lol

[@StevenRicketts]

That’s pretty cool

[@allen4779]

Very nice work thank you for a nice way to enjoy riding when I have a broken neck and shoulder good luck 🍀

[@Mikefestiva]

Allen Thanks for checking out our project! Sorry to hear your broken and not able to ride for a bit, I hope you recover quick so you can get back to riding. Take care and get better :)

[@bananasrotate7821]

Nice video too I'm gonna subscribe now.

[@boonedalton6201]

Hey mike, i put up my first video on my bandsaw , its just explaining the frame...kinda curious what you think of the carriage frame...happy easter

[@kevinbenware7096]

Great job guys. I did a similar swap for my son only it was a yz 80!

[@Mikefestiva]

Kevin Benware Nice! I bet your son has a great time on his dirt bike :) It was a bit of work, but it was a good project for my nephew and I to work on over the winter. It’s well worth it to see him having fun on it! It’s the kind of bike I would have really liked to have when I was his age.

[@bananasrotate7821]

I might buy a cr80 with an xr100 engine. Same exact swap as yours but different year and it has custom cr500 paint job. It's only like £570. The only bad thing is that it's in the UK.

[@64maxpower]

Good work

[@hoosiertrailrider]

Very nice mod. 👍

[@allanperryman388]

Nice job

[@oceantri]

Well done!

[@Mikefestiva]

Thanks 😊

[@yakacm]

Nice job, the round section tubing is stronger than square section, do you think this will make much difference in the long run?

[@Mikefestiva]

diecast jam good question, I was just working with what I had, I did not have round tubing or a way to bent it easily. My nephew has been riding it a lot since we built it with no problems so far. One thing to keep in mine is the XR motor is designed to be the frame on the bottom of the stock xr, so I feel it’s plenty strong utilizing the XR motor and it’s mounts along with the lower frame rails we built. We also plan to build a skid plate. Thanks for checking out our video.

[@vintagetintrader1062]

I am in the process of doing this right now, using a few donor CR85,. Question can you get away with leaving the rear engine lower mount in place, can the engine be placed forward another 10mm/ 1/2”?

[@walterdavis5380]

Outstanding 👍👍👍

[@Mikefestiva]

Right on Walter! I really appreciate it 🙂

[@tony7117]

very good job👍

[@Mikefestiva]

Thanks!

[@curtisj6349]

Nice build, you're very crafty. "but dude you got to consider what your money worth of your time." Im just kidding! Lol Nice bike!

[@Mikefestiva]

Haha! Thanks for commenting and checking out our project :) Take care

[@curtisj6349]

@@Mikefestiva i just that sub button! 🔴👈

[@redpillforreal3053]

Really cool

[@SteveHacker]

Cool! I have a hard time believing, though, that even a modified XR100 engine, being a 4-stroke, would actually outperform a 2-stroke 80, especially if rebuilt well...

[@Mikefestiva]

Steve Hacker No it’s probably never going to as fast as a running 2 stroke but I definitely can say it will outperform a old 2 stroke that had been sitting for years with a locked up crank, Haha 😂 we bought the cr 80 for cheap because the previous owner never knew how to mix gas. It turned out to be a great bike for my nephew and we had a good time working on it together and to me that was worth all the effort 👍 Take care Steve

[@shanehutchinson9387]

Xr would on top end

[@jasonpearson4983]

Hell yes. Now rebuild that 80cc 2t and throw it in the xr frame!

[@TheTruthBeToId]

I'm actually trying to do a build like this with a 2003 honda a cr80r that came with a yamaha cr85r engine that doesn't even fit. I have a 250cc I wanna fit in it but, still thinking about how ama go about it because the engine frame space is just small and I'm limited on the proper tools.

[@kellyevansbajabrahs9179]

How much would you charge to do another one ? I have a cr85 and a xr100

[@dalerogrrs7787]

It's worth it, teach boy something to.

[@BOB-rr5fe]

Good job 👍 👏

[@Mikefestiva]

Thanks :)

[@leroyadrianesbernardoadria3320]

Nmodel cr 80

[@myass5964]

That's kinda cool, less weight, more power

[@XavierSmithbuilds]

Less power lol

[@AmericanThunder]

cr80 stock = 21 hp, 160 lbs. XR100 with 120cc/26mm carb/exhaust/cam = 13 hp, 175 lbs. I think the project was just for the fun of building it with his nephew, not for more performance over the stock cr80.

[@Toxic2T]

@@AmericanThunder the CR80 has 26 HP actually. At least the ones sold here in Argentina.

[@jamesstacey529]

Be nice to see you put some vintage KTM 2-stroke Motors into some newer KTM 4-stroke chassis Vintage 2-stroke Yamaha engines into 4-stroke chassis..🤓

[@deepbludude4697]

Awesome!

[@mattproud8898]

I wanna do that with my 100

[@BenGallou]

Hi Mike, for my XLR125RW Project I will have to adapt a XR100 tank to my frame. Do you remember how long you had to heat the plastic with the heat gun and what temperature you used? Thanks from France.

[@Mikefestiva]

Hi Ben 🙂 I would suggest trying to fill the plastic tank with really hot water to help warm it up, do this a few times to really soften the plastic, keep the hot water in there and try to heat it with a heat gun I cannot remember how hot I was running the heat gun? I do know it was a bit tricky to get the entire area hot to mold without making the tank mushy on the surface, use something smooth and rounded this will help with molding it. Take your time it’s definitely something you don’t have to rush, when you cool it down with cool water make sure to keep pressure on the places you molded to make sure they stay that way as they cool off. Hello from the Pacific Northwest in Washington 🙂

[@BenGallou]

@Mike festiva Thanks Mike that will help a lot. The point is to lower the entire tank about 3cm. So maybe I can use the frame himself and pressure the soften tank on it? Did you use some metal or wood the press the plastic?

[@Mikefestiva]

Ben G. I would suggest using wood or metal, I think ether would be fine, if you use the frame it’s self try adding something around it to build it up a little, that way once you get it shaped it will have a little clearance once it’s bolted on, this will cut down on rubbing a hole in it later on down the trail 🙂 take care

[@BenGallou]

@@Mikefestiva I will try this and post a video in my project series as soon as possible. Many thing to do on this bike

[@samuelmcbride]

What about the gear ratio? Are you going to stick with it?

[@davidhelgeson6997]

I wonder what kind of a project you could dream up with an old vx800 ???? :)