BBR Lock And Load 49cc

Today we attempt to use the Lock And Load friction drive kit from bikeberry.com
We got it to work, but it was a headache!
We upload motorized bike videos every week (sometimes more)!
Music: RYYZN - Flood (INSTRUMENTAL) [Copyright Free]
FAQs:
Oil: 32:1, semi synthetic, random brands.
Gas: 87oct
Spark Plug: NGK B8HS (yd-100), NGK B6HS (pk80)Parts: I buy mostly from Amazon.
Favorite Motor: Zeda (Firestorm) Triple 40
Favorite Carburetor: NT Speed
Favorite Bike For A Motor: I don't have one yet.
To contact me directly find me on Discord "LA Hover#1036"
For motorized bike help, join the server / discord

[@ryansrides9490]

I’ve had so many issues with bike berry. I’m done buying from them

[@vmoya6631]

Dude you picked a different bike from the one the kit was created for. Then you cried like a sissy throughout the video. You stated the problems you saw, but bought no hardware to compensate for the bike you have. In effort for a smooth install. Based on what I saw in your video. Not sure why anyone would ever watch another one of your videos. Or even finish this video. Get a life dude.

[@ryansrides9490]

@@vmoya6631 what are you talking about? I’ve never purchased the exact product he showed. I’ve only ever bought 1 bicycle and 3 80cc 2 stroke engines. What video are you referring to anyway? Just curious

[@vmoya6631]

@@ryansrides9490 My comments were for the sissy that made the video listed above. My mistake...that was not directed to you. Video name is bbr lock and load 49 cc

[@Farmtractor]

Thanks so much for trying this out!!! Love the out of the ordinary videos!

[@gta5grindzxb145]

8.5 ounces of oil is what those engines carry. I've got one. Not friction drive, belt drive transmission and 415 chain to the rear wheel. Ebay kit.

[@Bt.Gang.Activity]

Same

[@Brian81-207]

I think you mean 3 oz 2.8 to be exact

[@joeMW284]

I have the 49cc huasheng in frame kit with a 7g trans. Been running it for almost three years now... Thousands of miles. I much prefer it to the 2-strokes because it's waaaay more reliable. The 2 strokes are fast and fun to tinker with, but it's always something. Using it as reliable transportation is questionable.

[@LAHover]

True, and good to hear yours is solid :)

[@person-ce8cr]

whats yuor opinoin on the 7g transmission?

[@samsuarez5833]

Where you get the frame kit

[@Brian81-207]

Why would you want a 2 stroke fake Chinese motor they are all trash

[@ChuckHaney]

LOL. I love the text wall at the beginning. Sets the mood. I can already imagine what is coming.

[@williamhaskellhaskell3162]

Have they improved quality? Are Stanton kits worth the extra money?

[@MrBri_Guy]

Love your vids dude. U know a ton about these bikes.. real entertaining vids

[@cadesdripp6858]

Your video are enjoying and relax keep them up bud 👍

[@Everatti]

Maybe try the “in frame” two stroke style like you always have, but with a four stroke.

[@kenngobrap7077]

Yea Hover put a centrifugal on that shaft and let it fly

[@EstebanArias93]

The problem with this is that you lose the pedal angle and need wide pedals instead. This is totally bummer as a person who is used to driving a bicycle will keep hitting the engine with his/her foot. Putting the engine on the back was a really nice approach, gg

[@kenngobrap7077]

@@EstebanArias93 Huasheng....

[@keeganhache6667]

Hey I looked at your channel it’s great! Please upload more motorized bike stuff and you will earn a sub or two.

[@Everatti]

@@keeganhache6667 Wow thanks! Didn’t think anyone would see it lol. I plan on making a couple more vids. It looks like it’s getting a lot of viewing traction (for me at least), so thanks for the suggestion!

[@4thebest-ever]

Hello I came to the comments at the 1.26 when you spoke about bikebarry. At the time of this video all my experience with them trash 🗑:( I been watching your videos and boy o boy I love your videos. I love your explanations the fun rides. Love your personality. This community is small but I see you and this Channel doing something big and fun for the motorized bicycle community. Much love from Washington DC

[@sketchydealer]

I almost bought this thank you for explaining the issues I might encounter before I spend the money

[@justinwhite4057]

Love the kent bayside frame, a really sturdy frame

[@LAHover]

The Piston has been found. Contest is over, look for more hidden pistons in future videos ;) Discord Users "adorius" 11:50 on the glass table "seanbbolson" 13:30 on the windchime

[@valentinmelendez8650]

You should get the same kit but from either eBay or Amazon it would have been better

[@valentinmelendez8650]

Also sorry that bikeberry runied the 4 stroke kit but I would much buy it from somewhere else just saying I have a 4 stroke but not friction drive and it works fine and is cheap on gas and starts up every time I'm just disappointed they gave you a crappy 4 stroke

[@motorizedbicyclerider5296]

Cool fiction drive motorized bicycle, and good information on this motorized bicycle friction kit, you have to find a sweet spot and I'm sure when it's broken in it'll ride better 🚲💨💨💨💨💨💨💯👍

[@rcstuff7718]

Friction drive looks dumb engine hanging out on the very back, and it wears the hell out of the back tire they’re a bad design.

[@dixiekayaker805]

Cool video! Very descriptive and the video quality is pretty good. Thanks for sharing your experience with the 4 stroke outfit. Your wife is a knockout! Please ask her to put her pretty ponytail inside of her jacket. I was cringing at the thought of her hair getting caught up in the works!

[@shelbertoswaggapants873]

Yeah I ordered some wheels from bike berry working fine so far and liking them, thing is when I ordered the wheels it was just supposed to be the wheels and a sprocket. I ended up with the wheels, sprocket, and it came with rotors and calipers(no instructions no cables or levers). About a week later I seen the ad on my phone and they changed the picture to include the calipers and rotors. That's cool but it would've been nice to know. I'd just say if you're using bike berry you're definitely rolling some dice. The reality edit was perfect.

[@b-ill2195]

I just watched a video where this guy took a friction drive then put a tiny gear on the top end and a sprocket on the wheel seemed much better and a greater rear mounted engine then a Lot I've seen Nice Video 👍

[@williespears1104]

It is setting on top of super clean!!

[@umaxen0048]

I bought a friction drive kit from another company. They gave me MANY options including MANY RUBBER DRIVE WHEEL SIZES. 5 years, no issues, was however $150 more expensive since it's either a Subaru or Honda engine in 2 or 4 stroke...

[@citizen9790]

What company did you buy from?

[@Slenderman63323]

@@citizen9790probably Staton Inc or GEBE

[@Tom-zv9fl]

Can you please do a video on the "thunder" (from gasbike) or "BBR tuning stage 2 performance CDI"

[@HughesMotorized]

I found most of those friction drive housings have the holes for the roller misaligned. That is what causes the clutch issues. I had to cut the steel in the housing bracket and reweld it to get the roller aligned. Plus the clutch bell/drum is a weak point. They fail early and oten. Easier to make your own if you want it right

[@normandgallant8106]

After watching this vid , I''ll be getting a honda 35 cc friction drive from Staton Inc . Thanks for the video .

[@Meatnyancat22Gaming]

2 strokes will always be the coolest

[@billdunbar197]

Yeah that's awesome You guys built her bike. I always wondered about those friction drives. I'm only halfway through the video right now but I had to giggle. I was thinking, Oh God he smoked the clutch And hasn't even got it to fire up yet haha . Maybe just oil off the exhaust from the factory or something? I had a lot of problems like that with my buddies 49cc 4-stroke on the Cranbrook. I'll tell you what though that thing surprised me it keeps up with a stock 2 stroke . Had a bunch of trouble with the clutch the bolts were too long that hold the pads in Oh, it would keep engaging By itself. The bronze spacer On the flywheel with bad that's a special thing you have to soak in oil overnight haha . I think it would be cool on a BMX bike or something small Or Add it to one of your two strokes And probably never have to Pedal again . She would probably like the 49 4-stroke It's super simple , easy to ride and fun . I'd probably look at a 79 but I'm not familiar . I'm glad you did this thanks

[@123edwardzpad]

Cool build!

[@mateoruiz7161]

Hey man I was doing some research as I intend on building my own motorised bike using a 66/80cc bbr tuning black angle fire bicycle engine kit 2 stokes from bike berry. I was just having trouble figuring out a suitable mountain bike that this set would fit I was looking at the cannondale trail 8 microshift mtb 2021. Is it possible to motorise this bike. If not do you have any suggestions in and around the same price as the cannondale I would really appreciate it. Also I love your videos. Thanks

[@joshreed8053]

On some your other videos whats the red tank you take with you for extra gas? Where do you get something like that?

[@trevormurphy7041]

I've only seen one or two of these kits on BMX bikes I would definitely see if you can get an electric start

[@dannysadventures387]

Hi please clou you tell me the jets you are running in the yd 100 also the carb please having trouble with mine running lean or rich cant fine the sweet spot thanks

[@PlayingWithFireOutdoors]

Hey nice review! I was looking at 4 stroke kits, as I dove into the thought of strapping a motor onto a bike. Strangely enough, that issue with the friction drive bearing tension happened then also. Resolved the same way too. Didn't see the googly eyes first time though properly but, after you said it was in there. I tried my KIMS (keep in memory skills ) and thought about it and whoosh there it waas.

[@lewlewwit]

Could you use the back pressure from the exhaust to pressurize the tank? Just a thought I had as I know nitro rc's do this🙂

[@chocholo135]

Do you think using a fixie bike is better for that kit and did you solve the belt problem and how

[@chipssahhhaughey9988]

I think thats a nice looking bike, i would like to know how the bike does on gravel roads.

[@ruskifishingboyz172]

Great vis

[@sh4branze]

It mounts on the front wheel or rear. Front mounting has clamps for fork mounts.

[@GeorgiaRidgerunner]

When I was first considering a motorized bike build I was considering making a purchase from bike berry but just through videos here on youtube and reading comments I decided that I'd explore other options

[@mattparker9726]

a 4 stroke friction drive? BLEAUGH.

[@damienarmstrong5985]

On top of the super clean spray can is the googly eye piston

[@brianmccann666]

Sorry to hear your 4stroke engine was not a good experience so far. Aww i see the problem. Friction Drive 4stroke Kit. Always go with the Phatmoto 4stroke to use. Glade to hear you may move it to the triangle part at some point.

[@Robert-hf5xr]

Thought about buying one thanks for this lol 😂

[@gta5grindzxb145]

I got one, but mine is a v mount. Belt to chain drive.

[@tomthomas9910]

Found a old school l 3 wheel edger , briggs 3 1/2 hp swapped the belt pulley for a clutch sprocket used the rear sprocket 44 t" fab"d up some angle iron to make that book rack frame and slotted it 4 chain tensioning so you don't have to take a link out of the chain for fine-tuning

[@mikhailjairnisbett441]

I have the same engine on a triangle mount, I start it with choke and wait will it starts dying a bit, then switch to no choke, best way I've found to start it.

[@artofdisguy3401]

Sounds like a traction engine ready to blow, And is it me or does it seems louder than a 2 stroke

[@geraldscott4302]

A Staton kit and a Honda GX engine is the way to go. Expensive yes. But you get what you pay for. I have one mounted on a Sun women's bike, with straight (not curved) frame tubes. I'm a guy, but I'm disabled, and I can't get my leg over the top bar of a men's bike, so it was my only choice. This was a single speed bike, and was geared to high for me to pedal enough to get it going. I swapped out the front crank with one from a mountain bike with a really tiny inner sprocket, and put the chain on that sprocket. I also had to replace the front fork with one I could install a brake on. and lastly, I installed a gas tank from some kind of landscape equipment (I don't know what exactly, I found it in the junk pile at work and it fit) on top of the engine mount bracket, just slightly higher than the carburetor. The tank was designed for a vacuum operated carburetor mounted on top. So I had to weld a rectangular plate on top of the tank, cut a round hole in it, and weld in a filler. I drilled a hole in the bottom of the tank and welded in a bung to attach the fuel line to. None of this was unexpected, I had been designing it for some time. When I had it all working properly, I disassembled it and painted the bicycle frame, engine mount kit, and gas tank. It looks factory built, and over the last few months it has worked perfectly. Everything fit properly, nothing had to be rigged. I even fabricated and welded a thick metal plate to the bicycle frame to bolt the engine mount to, so it wouldn't crush the frame when the bolts were tightened, and could never move out of place. I have a Honda GX50 motor, and I expect this bike to have a long and trouble free life. It gets me to work and back every day.

[@peterpemrich6962]

That's frickin awesome man. You should see mine man it's a mad max death trap with no brakes. I got a 49cc hausheng 4 stroke friction drive on a BMX bike. It goes 32mph. I'm looking to get a station inc friction drive kit and just swap the engine to that kit. Because bike berry is absolute garbage.

[@emilsvahn657]

Hey guys I want buy a kit for my bike but my dad won’t let me. Do you guys have any suggestions to convince him?

[@devanshruggs4026]

Great video bro. I haven’t ever tryed the friction drive because I figured it would wear the back tire out faster. I only built 2 stroke but was going to build my son a 4 stroke bike would be safer with the centrificial clutch I just don’t want him to dump the clutch on a two stroke and wrecking into something. Love the content wish my gf would ride one they r so much fun when they run and everything functions fine.

[@Freecountry44]

Some Guy on facebook tested this vs the normal 2-stroke chain drive. He was only getting around 200 miles on the back tire, the whole thing was shredded. Compare that to the normal 2000- 4000 miles the normal tire lasts.

[@jeffkrauss5582]

Do they have a big bore kit or of one I can buy

[@WillB-lv1xg]

2 words: staton Inc their friction drive is made in the US in the $120 range and they have options for cable length.

[@Baldys_projects]

Meh I'll pick my homemade friction drive bike over that but I do think the regular in frame mounted 4-stroke engines with the belt reduction system is a good choice for a bike and the engine can be upgraded to.

[@corysnladventures2758]

Maybe consider getting the chain driven set up instead of the friction drive.👍👍

[@carlosdandrea447]

I had a bycicle engine installed on my bike back in 1984, it was a K&S bike Machine, someone said it was a Mitsubishi 39 cc engine and it had the same anchorage as this one, it kept unwelding my frames

[@1981dasimpson]

from the looks of it tank is to low and carb is not filling right and i would prob use from mount and have rear of engine free to allow engine wight to apply the friction

[@chriscolson935]

How u mount the friction drive

[@joshnewsome6126]

Did you ever do anything for a high elevation

[@sundial6919]

I have 4k bulletproof miles on a Staton friction kit w a 1.34" roller and kasei 1E48F 63cc 2stroke only problem was broke starter rope at 600miles upgraded that no more problems but fuel lines an filters 32:1echo red armour or golden blend . Have other bike w Staton coupled to a mighty zanoah 42cc 12k rpm 2stroke w 2.3k totally reliable miles no breakdowns at all starts 2nd pull from new till now . Kasei little finicky w sometimes 5 usally 3 pulls both show no signs of giving out . If you want to spend your money once and minimal maint , these are the ones . Quick installation too

[@ferrelli76]

Is the piston on the window looking out with Henry and another piston lol.

[@jonny6758]

almost wondering if you should of went the phatmoto route I heard those are cool too but belt drive kinda neat dang didnt know have these issues :(((

[@Jarrod_D]

Five different road surfaces in one intersection that's Louisiana 💯

[@LAHover]

lol for real!

[@cannabassador]

I have the same gxh50 clone engine for my 20in friction drive but I used a staton bracket. I run a pulse fuel pump (highly recommend) because my fuel tank is mounted opposite side of the engine. I run the pulse pump from the crank case vent port on the side of one of those 4 strokes. I never had a problem

[@timenim2284]

What's a staton bracket?

[@cannabassador]

@@timenim2284 its a friction-drive bracket made in USA. I believe somewhere in the mid west. Best bracket made bc it literally was on 4 different bikes in 3 years. I also ride thru out the year, whenever the ground is NOT slippery obviously

[@timenim2284]

@@cannabassador thank you, I actually seen it a few videos after this one lol thanks again! Hey, do you know about the rear wheel mount option?

[@cannabassador]

@@timenim2284 no worries, but I dont understand your question. Please re-word it differently

[@timenim2284]

@@cannabassador kzbin.info/www/bejne/r6GblXWKbJxojas That's all I can find on it

[@Roberto_4273]

What do you need to do to make a 2-stroke bike legal in Massachusett?

[@willardbuchanan9122]

Man I am so sorry you're having issues with that four stroke kit I was considering it also but now I think I've changed my mind

[@kenngobrap7077]

Chain drive would be better

[@stanleydograu160Fan]

*The right thing would be to put the engine in the middle of the frame, right?* 🇧🇷

[@Hamster3]

no because this kit doesnt use a chain and its designed that way

[@stanleydograu160Fan]

@@Hamster3 Got it 👍🏻

[@gui_arriaga_0332]

Mas vc ta em todos os video de motorizada? 😂😂😂

[@stanleydograu160Fan]

@@gui_arriaga_0332 kkkk quando você ler os comentários eu estarei lá 😅

[@1981dasimpson]

things id do with the kit make a solid frame mount rear above the wheel mount engine to that cut down the fricton drive plate to add a spocket then run a chain from that to the rear casset of wheel loosing a gear from the peddle system drill and tap a nipple onto the inlet manifld to run a pulse pump for the fuel tank and then it should be a nice running kit

[@remspeedwagon]

Lots of problems installing my BikeBerry motor 49cc kit. No instructions & missing parts - braces on rear - fuel line too short-kill switch line too short and again no instructions. Had to splice kill switch wires. Waiting and waiting for parts.

[@1981dasimpson]

that must be a universal kit as you have to search the universe to find the bicycle it fits surprised it does not have a tension arm so the friction drive can be lifted off the wheel allowing it to spin freely

[@mrfun6124]

Orsum video

[@orca4770]

When you start a four stroke put the choke on and pull the pull starter slowly all the way out 3 times and then you give it a fast pull

[@ajmotorsport9246]

When you clean the carpet at the end if the video the googly pistons eye was on top of a spray can if am not mistaken

[@christianscottsuzuki]

Im hating onnthe way the thing is mounted lol. Maybe if you add that alomg with a two stroke but would be nice if it fit in the frame

[@nomadnickbikehobo9598]

I bought that same exact kit from bike berry... The clutch bell broke like six times and I gave up on it

[@Brian81-207]

I know this video is Old but I’m not sure what his issues are. I’ve had two kits from Staton that both broke and now I have two kits from bike Berry that were given to me one I have been using for two years without any issues with the 38 cc motor does 33 mph.

[@harryjoe860]

I watched this before I got a kit from bike berry and was worried I’d be screwed but went with them anyways. Every thing was right except the electrical which was fixed with some pliers and a knife. To do these kinda things requires tinkering and I don’t think many realize that when they get into it.

[@peterpemrich6962]

Mine came with all the issues yours did, but get this... Where the engine mounts to the friction drive, one out of the 4 holes did. Not. Match. Up. I spent about an hour and a half hand filing it in to fit, since at the time I couldn't afford any other means to do so. It was so rediculous. And then came the issue of the big U Plate holding the friction spindle being way too thin so I had to go to the hardware store and get a thick bar cut to the perfect size and jam it in between the plates so they would stop causing uneeded pressure on the friction drive spindal bearings. It's been a year now and somehow it's holding up but I'm going to get a station friction drive kit and just put this 4 stroke onto that that one since that one is much MUCH more thought out and way higher quality. I suggest you do the same bud 😊

[@Crowdcrusader]

I am new at motorized bikes and I build my bike out of the same frame should I make a video i’ve already put around 115 miles around on it

[@ChuckHaney]

Sure. You can make a walk around a video and talk about your bike. You can make ride videos as well.

[@natester1064]

I'll skip bikeberry and go straight to Amazon. Thanks for the review.

[@larryshaver3568]

i didn't know Henry had an accident, was it bad?

[@alexanderson5749]

What happened to this motor you never gave us an update on it

[@lakesheppard5466]

I bought this kit with the bike recommended for it I hope I don’t run into to many problems

[@lakesheppard5466]

Are most of your problems related to the bike? Other than missing parts? I’m gonna probably sound really stupid but do I need a fuel filter, I bought this kit because I’m not good with engines at all and I needed something simple/reliable to get to work

[@nathanreedy4183]

i have had a ton of experience with bikeberry and their support. The website is notorious for not having detailed info and will say that the factory is the one with the info. They do not spec out screws, bolts, threaded holes, diameters of parts, lumens or anything needed to source or repair parts. They are relying on people buying entire bikes with installed motors because on many occasions with many different representatives they said it would come with if you bought the entire completed bike. The parts they sell don't even necessarily fit the frames and bikes they sell. I have an F-zero frame and i had to mod or buy new hardware for basically every part. Just be aware it is a project when starting one of these especially from bikeberry.

[@codenamethecleaner7519]

Glad I found your video man, SAME EXACT ISSUES, no hardware, the long tensioner nut they show in their video has no studs that fit it in my bag, and the quick release doesn’t fit it, absolute trash of a kit I’m glad I got it from them on eBay so ebay will give my money back

[@codenamethecleaner7519]

Also how did you fix the issue cause right now mine just spins cause the clutch is locked, so I can’t even drop the engine cause the shaft is spinning so when it hits the tire it shreds the rubber or stalls the engine…

[@LAHover]

I ditched the friction drive and bought an in frame mount. Don't use bike berry's mounting kit... It's BADDDDddddd! unless you have a welder.

[@freshjuice9352]

Why did you not use the chain and put it in the frame?

[@LAHover]

You are asking a question that was answered in the first 2-3 minutes of the video... There may be no hope for humanity after all o.O

[@mtb585fishing8]

I like the 4 stroke but I think you got the wrong one. My opinion you should have got the frame mount chain drive.

[@valentinmelendez8650]

Love four stroke engine we need more videos like this

[@samuelbrowand1614]

Bike berry was a good company years ago. The problem is they have a supply problem. Many of there high end products like the 4 stroke engines are hard to get replacement parts for. I had one of there 79cc and I burned out the centrifugal clutch. I waited over a year watching for them to have them in stock. I gave up and got rid of the motor. There crank shaft was a size that I could not find the clutch from some place else. There was also a problem with the bike they sold me and said the engine kit would fit. I had to cut and drill to make it work. Even then it was never what It could have been. Until they work out all there supply and demand problems I would only go there for small end items.

[@im_duckyx3933]

you should try mounting the fuel tank at the back

[@im_duckyx3933]

or i seen a thing before with a 2.5 tank and it was rear mounted

[@jessediaz852]

Have you tried any other four stroke options? If you haven’t I’d say try it this kit doesn’t really do four stroke kits justice.

[@LAHover]

I ended up mounting in the frame. Runs good.

[@robertpersall1485]

I ordered ebike kit from bikeberry with similar results. Incomplete kit and total lack of customer service. They actually told me to take it to a professional.

[@WhiskersTheFish]

I was looking at the windchime and didn't even see the piston lol.

[@hollowdonte]

Different oils have different consistencies and it says on the oil bottle how much you should use per gallon of gas

[@LAHover]

This is a 4 stroke. Oil goes in the crankcase, not the gas.

[@PATB-qz7mn]

I got my bike running around town nice, there is a problem though bike berry will not help you

[@mrpartridge8765]

I have a review of it on my channel as well truly a lovely experience with bikeberry

[@johnnieguzman3997]

you should go the other route with the in frame 4 stroke motor it fits in almost bicycle frames and don't buy from bike berry get from Amazon

[@willardbuchanan9122]

By someone I was informed by someone that predecessors make it in 49cc or they made one but I haven't seen one yetI have looked also because I was informed it was already made but I cannot find one either but I've heard rumors that there sounds like the plan I'm building one or they already had one but I have not been able to find it

[@savagegtalks5912]

I saw this engine on the hub with a short chain...? this is confusing.

[@marcs4091]

O man Bikeberry striks again! I Bought the other Four stroke kit that they sell. The drive gear on the transmission Wouldn't work with a 415 chain. I sent them two pictures They stopped Responding to my emails after that.

[@jaykoerner]

You can use a seat post mounted gas tank if she needs a women's bike, granted having a motor with no bar above it might be worse, your call

[@HanzelFonferek]

What brand of bike is that? It looks like a good bike for a build

[@LAHover]

A 2016~ Cranbrook

[@HanzelFonferek]

@@LAHover Thanks, appreciate it!

[@ajmotorsport9246]

I was looking for the piston

[@jessesaucedo6203]

You got a bunk one or you set it up wrong or went to hard on it while the break in. And you can put a pump on it. You just mess with it to much and end up fucking it up because you are tripping on a noise or something wired

[@robertwade625]

Hello mr. Hubber my name is Wade please take a look at my motorized bike I am very proud of it even though it is broke at the moment that is the fun of it all I follow you faithfully and watch every one of your videos you are a knowledgeable and very helpful dude I appreciate all the information that you gather and pass out to the masses

[@codelicious6590]

It seems the energy transmission between that drive wheel and the bicycle tire is very inefficient and maybe a four stroke with a direct drive transmission to the rear wheel may have better performance but then again...why? Why when you can get so much more power out of the small and easily modified two stroke options? Even when theyre absolute JUNK you can still make em decent with a little ingenuity and elbow grease. Im sure the same holds true with a four stroke kit but they havent made one cool lookin enough or with a comparable price point for me to give one a go.