Honda GX 120cc Motorized Bike Part 3

This is my last video of my three part series on building a Honda GX 120cc motorized bike. I am so exited for this build to finally be done and I'm sure you are too, so stay tuned for the video where I will explain how to do the break-in period for the engine as well as a test ride.
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Check Out: Torque Converter Install Video • Predator 212cc Torque ...
Parts I used to build the bicycle are in the description of this video: • Building an 80cc/66cc ...
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Instagram: / carano_cycles

[@aaronlarsen7447]

I was interested in motorized bikes but, I hated the sound of the cheap engines and no suitable muffler. I knew a Honda would be the way to go. So i found this video. Your build is awesome!

[@BenCarano]

Thanks!! Yah it’s definitely reliable

[@lincolnweller9123]

I put a 31/2 Briggs on a bike . Took it cross bc many miles . But your bike is the way to build them and good power . I had to peddle up dozens of summets . I can see your bike would do well with any hill . Thanks , been looking for years , for one better than mine . Found it .

[@user-wk5vn1ry7p]

Great job! The three videos were really interesting. I realize that a 2 stroke has advantages as far as weight and fewer mods to fit inside the frame and other considerations, but the 4 gives you the reliability, a greater sense of security, and real feel of a motorcycle. Your ride to the mountains was great and your comments were clear...it felt like I was riding with you! I only wish your camera was more pointed towards the front to get the panoramic view as you saw it.....Great job!!

[@BenCarano]

Glad you enjoyed the videos! Yah the camera was tough since it was my very first very cheap camera at the time of this video haha. I've since got a much better gopro for this kinda thing, but glad you could still follow along! :)

[@tritonalabaster6269]

Holy crap dude, you take real good care of your engines. I appreciate your dedication and due diligence with the break in periods of these motors- a less patient mind would add oil and gas and think nothing else of it

[@BenCarano]

I love that you recognize that! Some people don’t care, but I definitely try to keep them running as long as possible. As of now I have over 10,000 miles on that engine, and it’s running like brand new starts up on the first pull and I’ve never had to do any repairs

[@greenghost6416]

@@BenCarano Nice

[@chrisstokley7687]

yup, sleeves/bearings/built like a car!!! last forever! or until some1 runs you over ! lol.

[@nickhersheys2706]

Nice handlebar! 100% vintage approved !

[@paleinpaler2452]

Chisle

[@lawrenceregan2830]

I've been riding 2 stroke motors for about 2 years, considered getting a 4 stroke, you helped me make up my mind, think I'll start with something small though, beautiful ride by the way.

[@chrisstokley7687]

little bit slower per hp.. but sleeves/bearings/built like a tank.. last longer.. quiet 8-to10x -...new torque belt transmition.. for 3/4 or 1 inch shafts.. last like 15 yrs if dont raw dog it! dads made it 27 yrs ..klutch :>).. amazeing! im was building the 212 preditar... but i thinking the 79 cc looks plenty powerful enough... my 49 cc is ok at 28mph.. 250lbs< .. thinking i want 35mph.. lol .

[@Erik-le3fn]

I'm inspired, thanks. I'm getting a Phatmoto 2022 on 6/20/22. I'm going to get the GX 120cc along with a torque converter as well

[@InHisName999]

That is just plain Bad Ass! Simple and cool.

[@InHisName999]

I love it and want to build one right now. Great job my friend.

[@russbilzing5348]

While I have tremendous respect for the work I've seen you do, I must state that that is NOT a torque convertor. There is one company who mislabeled their Constantly Variable Transmission (which is it's proper name), or CVT, as a Tork-A-Vertor (sp?) and started all this confusion. So, now you know. Keep up the good work.

[@nickhersheys2706]

Please put a front suspension fork. It will take 50% of the stress on the frame, given the weight of the engine and your body. And a spring saddle will help too. Ha ha I know the cops wont open up the engine and measure the bore and the stroke lol. Put a 49cc sticker on the engine. That's what I did :) Awesome build by the way. Keep cruising ! EDITED - Don't forget to put on the transmission cover so your shoe laces don't get caught in the belt. Ride safe.

[@TimpBizkit]

It's odd really as it's quite a low revving 120cc and thus is quite a relaxed tune. There are 50cc engines with way more power. The engine in a Piaggio Zip is probably one of them.

[@ronalddaub9740]

@@TimpBizkit maybe more power on the pipe but not torque a four-stroke has, it can just relax and do its job , a two-stroke has two definitely scream depending on how it's tuned...

[@dmoore0079]

Nice clean build! The torque that motor has is impressive.

[@kirstenspencer3630]

Nice build for sure. Glad you left the motor stock for Longevity and economy. Thanks for sharing. Like the appropriate 1 hundred pound weight. Fine job...

[@BenCarano]

glad you like it! yah I still have the bike to this day and still starts up first pull, definitely worth caring for mechanical parts and they'll care for you!

[@NoBaconForYou]

Thanks for sharing your experience Ben, I have decided to do a predator build from scratch instead of buying a kit.

[@Jz-sv1ju]

Nice bike and congrats on your build benjamin.

[@tedcater9624]

Wow nice video beautiful place to ride I have a 212cc motorized bicycle I love it fast plenty of torque and reliable. Enjoy the ride

[@anthonypeters44]

Start everytime

[@benjibarnett1962]

Me to p212cc

[@chrisritchie2996]

What kind of bike do you have the 212 on

[@YoLo-dc1uy]

When breaking in a brand new kart engine your doing exactly that. Breaking it in. When assembling it you would use a molly based assembly lube on the internals. Then run a thin cheap 5w-20w to initially break it in on. Before firing the motor for the first time. Rotate the engine assembly 360 degrees side to side and front to back with oil in the crank case. This will ensure everything inside the engine has been pre lubed. Run it for about 15-20 minutes. Breaking a engine in is essentially seating/wearing/lapping every metal mechanical part to a Match. A thick oil with a bunch of additives like the Lucas will actually prevent the engine from breaking/seating the rings and all the other components to each other. Once it’s broken in and ready for 2nd oil change. Lucas/Royal purple(zinc) or Shaffers7000 racing oil has molly in it. All three prevent the metal components from creating less friction and wear between metal components. In my honest opinion the shaffers racing oil is the best.

[@beckyg4860]

Well you are correct , dose only apply to all new motors or it doesn't matter if old or new can you use same persis

[@joshuarockwell2839]

Thanks bro i just started watching your videos and i will be checking out the rest of them

[@TimpBizkit]

I'm wondering if these can be adapted to run off a broken Bafang BBS.. transmission. It might be worth searching for any with blown motors. That way you'd have the freewheel and bike transmission built in. I think the reduction is only 15:1 though so you might need a mini belt reduction.

[@james1intel55]

Awesome video man you did a good job👍

[@seansollars70]

Nice job on your bike. I will switch to teflon grease for wheel bearings.

[@anthonypeters44]

Ben you did an awesome job that is plenty fast enough.

[@thompsonbrian8791]

More speed man.

[@meco72104]

Awesome bike build.

[@user-ps8fy1te6p]

Nice job sounds & looks Great

[@thadnipper9411]

Nice job well done!

[@ddh3098]

Awesome build

[@bsatrialsguy9095]

looks cool great job

[@noahgrady3628]

Very cool. Try gears? On flat ground you’d be at 55 mph with no excess wear…great video. Great job.

[@barnstorm100]

You inspired me to build one. I was having a problem aligning the chain. I now see you have narrow tires, That's my problem, my tires are too fat

[@trecon8296]

I feel good enjoyin the ride witchu. I no longer have my lil brother with me anymore im sure he woulda enjoyed a 2 guy ride like this my guy great vid👍 i got a phatmoto rover 79cc (matte black) stay ridin👍💯

[@BenCarano]

Heck yah man!! Glad you like the vid!

[@trecon8296]

@@BenCarano im impressed 💯

[@SethLevy1]

This is great, thank you for the video

[@FMonster1550]

I love it man I really thinking about getting me one also

[@SB-fe4gt]

Nice job...appreciate the videos. One recommendation when breaking in an engine, change the rpm/load.

[@BenCarano]

Thanks! And yes definitely, I didn't mention that but yes!

[@hatman-fo9uk]

sweet bike bro! that thing is awesome!!! U have a great and genuine commentary for your vids. I wish i was handy enough to build one of those, if you would build me one id pay you for sure, that bike is just amazing u did a very ingenius build. cheers bro

[@BenCarano]

Thanks!! So glad you enjoyed the build! i thought about getting into building more and selling, but decided to take the mountain bike rout instead

[@hatman-fo9uk]

@@BenCarano awesome dude, if you ever want to build another id be first in line. once again i thoroughly enjoyed your video and the bike is phenomenal, Plz build me one,lol

[@user-ys8yh9bj8m]

I do the same thing it's Kool to see someone else who does this to

[@FireElectrick]

What measure is the screw on the motor shaft where the centrifugal clutch goes?

[@robletto841]

Great job!!!

[@mickeycab1]

Great job 👏

[@martinpanks992]

If your worried about wear on it’s first run, put some 2 stroke oil in the fuel maybe @ 70-1

[@mikesbarn1858]

My break in regimen is Lucas motor kote and full synthetic. Run for no more than an hour and change. I also run a 1/2 quart of premix 50:1 then switch to premium no alcohol. For oil changes I install an oil drain hose. Much easier and cleaner.

[@bobbyjohnson4734]

You did a great job on your bike *****

[@offgridlivingstlucia8865]

This is awesome

[@albertmichall5732]

Really nice Ben , I like the silver (Maybe you could name it "Silver Streak")

[@BenCarano]

Yah that’s a good one! Glad you appreciate it!

[@timdodds213]

Good job

[@bobgrim6735]

Good work👌

[@gersonpapis2226]

Very cool, well done, congratulations. I would like to ask you one question. Where did you buy the tork converter ? thank you !

[@BenCarano]

Thanks! as for the torque converter I am sorry to say that the company I bought it from stopped making them with the gear on the opposite side from the pulley. Some of my subscribers said they found them from third party sellers on eBay but I haven't found any.

[@BuildBreakFix]

What and where do you find that engine mount for a motorized bicycle gas tank frame! ?

[@BenCarano]

I made it

[@twowheelrodeo]

The motor seems very smooth compared to other bike motors.

[@BenCarano]

it runs very well!

[@TheOzthewiz]

@@BenCarano It's a Honda! I have a 43 yr old Honda HS55 snow thrower with the slightly larger GX 140 , also starts on the first pull even at -10F. Engine is ALL ORIGINAL, down to the Japanese carburetor. THANKS for the video!

[@BenCarano]

@@TheOzthewiz Amazing!! yah they definitely go forever! I've got a compactor as well that's over 15 years old and always stored outside and submerged in mud half the time when I use it. Keeps on going like new haha

[@benjibarnett1962]

Hi im doing the honda gx 120cc motor with the same frame can you give me the specs on the motor mount

[@coburnlowman]

Is the 120cc in the same family as the 160cc , 196cc ,212cc. I'd like to put one together with the 79cc sized engine. But not sure if the 120cc is the mid sized or the 79cc sized engine. If it's the 79cc size a person could squeeze it in under the radar as a 49cc , especially if you had a Laser etch the bock crankcase. My scooter 🛵 is a 125 but had professional decals made in the same script of the other writing that say 49cc. Anyway haven't had any problems yet.

[@JK-zl7vv]

On your engine braking, it's not something that is favorable, because if you had to pedal the bike, you would be fighting against the CVT, even if the engine if off, so it would be best to put a one way bearing in the sprocket that is at the CVT that goes to the wheel, This way you can Coast down hills as well as pedal the bike like a normal bike with no resistance from the CVT drive components. As far as noise goes, had you ever thought of getting a rear bike rack (the type to hold saddle bags), and put a much longer quieter muffler between the bike rack and rear fender, this will make it quieter and the rack will act like a muffler shield so things wont be able to get burnt on it. Great job brother 🤠🙏💖

[@BenCarano]

the engine braking only is effective with a bit of throttle applied to the engine, otherwise it's like you said being no resistance to pedal which is nice. i do have another seat for it and luggage rack, just usually prefer the look without it. Not too loud but i could be a tiny bit quieter at times. Obviously I don't hear it cuz I'm the one riding it, but to others who aren't always going fast in front of the engine it would definitely sound louder haha. Glad you like the build!

[@rebuildrcs538]

will your engine mount work on other frames , if so can u make to sell ? , love this build want to build my self one but im a big guy 6"5 touch over 295 need bigger frame .

[@BenCarano]

Unfortunately I’m not selling these yet, you aren’t the first to ask though haha

[@63phillip]

Really cool , not sure I would like the clutch that close to my leg though.

[@KB_Joys]

Im really liking what im seeing with these higher powered 4 stroke engines on bikes. You said that initially you were going to get a gx160, i see those widely available, and lots of clones as well. I have a felt faker gas frame and id say that its pretty similar to yours, but im not sure about dimensions for motor fit. I like your idea about using a torque converter. One if the things that has made me shy away from the 4 strokes is how wide they seem to be on a bicycle. Have you run into problems, such as inconvenience, or uncomfortable about how wide they are mounted into the frame of a bike? Id say that i want at least the power you have with your motor. I wonder how big i could go before running into any clearance issues with my felt faker gas frame? Nice bike and thank you for the video 🙂

[@BenCarano]

Glad you like it! Yes the width is definitely pretty wide, I had to have a special axle made to clear it and still be able to use the Cranks I wanted. I think they make special Kranks now that are wide enough though. Not sure how good quality they are though

[@jeremiahfogg4836]

Wherd did you get the motor mounts

[@larryshaver3568]

that really has good power!

[@BenCarano]

Oh yah, it has a lot for a motorized bike

[@JesusRoseAgain]

Nice bike and video

[@BenCarano]

Thanks!

[@MrBeracah]

Hi Ben how much was the total cost of putting this bike together thks. Also what is the law in your state regarding motorised bicycles

[@joneserupinsmoke9161]

It's a cool build though bud👍👍

[@rbdobynes]

How was the brake time to slow toa stop?

[@rusty-oc2tj]

that honda sounds so nice, i just found your chanel, new sub

[@BenCarano]

Thanks! I appreciate it :)

[@dmartinnj]

Did you ever get a speedometer for it? Love the build and very interesting. It's been 3 years now, maybe give us an update on it???

[@BenCarano]

i suppose I could do an update soon! I'm more into mountain biking now, so I haven't been riding it a ton this year, but I still have it haha! Glad you enjoyed the build!

[@lukerogers6273]

Hey Ben! Nice build man. I have the same frame and am thinking about putting a honda on it. Was wondering where you bought that transmission plate from? Or do I still need it if I use the torc converter ?

[@BenCarano]

If you use the torque converter it should come with everything you need!

[@lukerogers6273]

@@BenCarano and you say I need a predater 212 torque converter? Hey thanks for responding man. Beautiful place you live.

[@BenCarano]

@@lukerogers6273 Yes that is the one I used, there are a few other video on my channel about it with more detail on it. Hopefully it is still being made, production has been on and off lately!

[@richarddevaottien7724]

Felt like I went for a nice ride 😁

[@JoseDiaz-ug1xo]

Do you sell them mounting bracket ? I'd buy one 1

[@reyarturo9536]

What kind of converter it`s?

[@beckyg4860]

Hello thank you your information On how to take care of motor, ; but not sure about fort or tin wheels would be safe for a motorbike my opinion is because of all the bamps and dart est...!. But all due cool looking bike, I like the bike frame with built in tank and no external tank hope to see more up grade or improvement . Good luck from highway control safety !.

[@BenCarano]

Yes the road bike wheels were for when I had a smaller engine on it, but if I did this same build again I would definitely use bigger tires! The bumps are bad

[@person-ce8cr]

How many teeth in sprocket. What are advantages of torque converter?

[@BenCarano]

My rear sprocket is 36t the biggest advantage to a torque converter vs a centrifugal clutch is that it goes faster as the pulleys chang size as the engine speeds up. It also has a lot more initial torque when starting from a dead stop. But I'll also do a video explaining all that in more detail soon and why I decided to switch.

[@geralddeitz9169]

Awesome build! I have many motorized bicycles I built myself. I think I'll try this as I have a few of that Honda engine still in the box...

[@carlosberrio2206]

Could you please send me pictures? I’m in Colombia SA . Next summer’s planning to crops country from east west USA or west East but would like to buy a 4 stroke silent bicycle like pathmoto all terrain but rather have it from an American all around mechanic of course garage sale price 😝

[@benm2046]

And believe it or not every 2 days I will go out for 30 miles on a two-stroke bbr tuning. I definitely run this little motor to the fullest but I do want to try 4 stroke what is a good four stroke brand you can refer me to

[@BenCarano]

Honda is obviously the bullet proof one, but if you want cheaper then the preditor engines are the most common

[@japanesemickeymouse6694]

were do you get the motor is it a lawn mower motor

[@raulcruz6601]

EXCELLENT

[@ronalddaub9740]

Break in is very important.. don't let anyone say otherwise..thanks

[@motorbikemadness5773]

Awesome Bike! Video editing suggestion: No music when you are talking.

[@joneserupinsmoke9161]

So what type u like better two stroke or four .me I'm more of a 2 stroke dude.i just like how they get up and go with small engines. Four strokes u have to do all types of mods to get em to pick up like q two stroke. But I like the rumble of the fours with straight pipes

[@BenCarano]

I love both honestly! I like 4-stroke for reliability because they never die, but I like 2-stroke for small light vehicles that need lots of power and toque

[@carlosberrio2206]

@@BenCarano hi Ben , any 4 stroke pathmoto all terrain type with your wisdom in it , build by you , for sale next summer? I’ll be going to the states to follow itchy boots trails in 2023 but in bycicle. Of course I’m in 👨‍🦼🚵🏼‍♀️a tight budget

[@BenCarano]

@@carlosberrio2206 I’ve moved into the mountain bike world now but maybe someday I’ll sell them :)

[@benpenguin1189]

Damn live in Colorado too, id be dope if you did i meet up to go riding!

[@BenCarano]

that would be fun

[@RemyRAD]

Great video! Great review! I'm sold! Got to get me, one of, them thar, 4 stroke, bicycle engine kits. I've been watching and waiting. I really want to look into a, hub Drive. I've got a 21 speed,, Dan Fisher, mountain bike. With new knobby tires. And I think, it would look really fine, with a motor. And great for an old codger like myself. At 67 years of age! Woo hoo! Actually it sucks. Oh to be young again. Zoom zoom! RemyRAD

[@BenCarano]

Heck yah :)

[@ronalddaub9740]

I'm not anti 2-stroke it's just the fact when I'm rideing something I like for the spark plugs to last almost indefinitely. AKA 4 stroke When I built my motorized bicycle I cut a Puch moped literally in half and used the rear half with pedals and sprocket bigger spokes rim and better sprocket. Welded that to the front of the bicycle then the rear end could take the punishment I even have rear suspension.

[@carlosberrio2206]

Hi Ben, Carlos from Colombia S.A. Are you Planning or thinking on open up a factory shop? E bikes are pretty good ,but it is hard to find a charging station high up in any mountain , in any. country. I believe gas bicicles are going to be the way to go for most of us ,since e bikes prices are way too high.

[@BenCarano]

i've definitely thought about it! you aren't the first to ask. However I don't plan to sell them yet, i have transitioned to the mountain bike world and I am starting a business selling those but not motorized bikes specifically!

[@shyamlisardar23]

I had a question can this bike made with any honda engine like gx270 or gx160 using the same process

[@BenCarano]

It can but you would need a bigger frame. I actually tried it with the gx160 and it was too big by like an inch. So it is possible with the same process, just not with the standard built-in gas tank frames.

[@zedee2000]

@@BenCarano can you still pedal the bike without your legs hitting, rubbing pull start cord, the torque converter or burning?

[@BenCarano]

@@zedee2000 you can, but it is a little more difficult and less comfortable with the big 4 stroke than the small 2 stroke!

[@rustyshackleford3132]

please post fuel mileage, top speed and 0-60.

[@wilfredlinares9755]

What are the dimensions of the engine (L,H,W)

[@shantanusardar4378]

Can you please make a video on how to connect a kill switch

[@BenCarano]

Yah I could probably do a quick video on that soon! It's very simple

[@maxbritain1380]

What frame is that.

[@patdabarber118]

What motor mounts your using, if you don't mind me asking? Sweet, looks pretty solid.

[@BenCarano]

Thanks! you can watch part 2 to see how I did those

[@patdabarber118]

@@BenCarano thanks 😊 🙏

[@johnnyarnett4904]

Nice

[@X1GenKaneShiroX]

Having high torques makes all the difference because on a regular bike you would realistically take 3-4 hours doing 25 miles but on a motorized bike it would take 1.5 hours doing 25 miles.

[@garydorsey6769]

How much was you total price on it

[@888gdc]

what road is that???

[@seansollars70]

Nice bike lanes there

[@BenCarano]

Yah I'm definitely lucky to have good bike routes around town

[@YoLo-dc1uy]

I have a 212 predator on my bike with a cam heavy springs header and airfilter adapter. It’ll run 40 mph with the governor mech set at stock to act as a rev limiter

[@Nostalgik64]

tell me where you got your parts please i'm tired of bike berry

[@BenCarano]

Same! I definitely don't trust bike berry with anything good these days after the quality of my last engine and parts! i bought from harbor freight, honda, CDH and other cnc companies that make the sprocket adapters and all

[@icco3351]

I like your frame bike

[@duaneopczynski2384]

awesome build. bbbbuuuuuuttttt those rims will fail with just the right hole in the road. take it easy brother

[@BenCarano]

The rims are velocity rims. Some of the strongest in the world. They’ll hold up just fine and have for the past 6 years even after getting multiple flat tires and rising on just the rim to the roadside and then to walk it to a bike shop

[@BenCarano]

The cheap normal rims this size would definitely fail though, I took that into account when building it

[@deej7783]

Where did you get this kit??

[@BenCarano]

Amazon, velocity, eBay, harbor freight, a machine shop and the hardware store haha

[@johncorreia9041]

what frame are using?

[@BenCarano]

a CDH power one

[@bartsshorts]

what is th epoint of leaving it idle for 30mins? why not just use the thing gently? it will have same results of running in

[@BenCarano]

Good question, using it will pretty much do the same thing, idling it is just going the extra step as it is the easiest on the engine for the break-in

[@marcs4091]

Hm I wonder if that engine would fit on a Phatmoto. I have looking to do a engine swap.

[@thadnipper9411]

me too

[@thadnipper9411]

I have a Phatmoto all terrain with 4" fat tires brand new but it's crying for a honda engine

[@BenCarano]

Hey everyone! I'm sure it will fit just fine, but you might have to make your motor mount to slightly different dimensions specific to your frame and rear wheel

[@zedee2000]

@@BenCaranoI thought with that short exhaust pipe and small muffler it would be loud. Wow it seems to be very quiet like my 2200 watt Honda inverter generator on propane! Is that muffler the straight through type? For trails I like very quiet so no one calls the law. So far for a few years on side walks and trails. I always wave at people, I go pretty slow, I keep pedals turning with engine off most of the time. When engine is on and riding on trail or sidewalk in city. I"m coming up on someone I see I always try to cut the engine off ahead of time wave and pedal around the person with plenty of room. If person doesn"t move over I go off side walk or in grass. Keeps them from calling law.

[@BenCarano]

@@zedee2000 Yah it is very quiet with the muffler! I usually just turn it off when i go on sidewalks, but i'm on the road most of the time

[@stevealacavage2321]

How many MPG ??

[@davidanderson4500]

brill.

[@FireElectrick]

Con el clutch centrifugo a cuantos km/h corre?

[@BenCarano]

64 km/h velocidad máxima

[@FireElectrick]

@@BenCarano Exelente proyecto felicidades.

[@BenCarano]

@@FireElectrick Gracias!