4 stroke

  1. C

    How to set up 4 stroke carburetor - what do these hoses do?/how do I hook up these hoses on my engine

    Hi, I am new to building motorized bicycles, but have been doing fairly well following the instructions and finding information for my first build, but I have been unable to find information regarding the carburetor for my engine. I have added pictures with my questions, I hope they will be...
  2. 79cc 4 stroke huffy Cranbrook

    79cc 4 stroke huffy Cranbrook

  3. 79cc four stroke Cranbrook

    79cc four stroke Cranbrook

  4. B

    Bikeberry Builds Complete Motorized Bike Giveaway

    Welcome to BikeBerry Builds! The show where we take new or old bicycles and overhaul them with the latest engine kits and performance parts. But that's not it, don't miss out on this awesome opportunity to take home your very own Micargi Pantera Motorized Bike Build because at the end of the...
  5. RocketJ

    Gas and brake pedal

    So here's an idea. Most older motorcycles have a foot brake. What if i were able to attach another pedal next to that brake and wire it to the carb, creating a gas pedal? Aside from being a bit wider, i think it would work pretty well. What are your thoughts?
  6. A

    Centrifugal clutch 49cc

    I’ve been looking for a solid company to buy a 49cc centrifugal clutch engine kit. Any suggestions please leave links or names please also do they have engines with electric start just curious. Drop best bikes to possibly buy to fit the engine thanks
  7. RocketJ

    Running a 420cc predator in upright position

    Is this something that can be done? I've heard that predators suffer from oiling issues if operated in an upright position.
  8. Will'smotobikes19

    Miniature v8 or v6 on a bike?

    Time for another think tank on these ideas I have lol jk. But I saw a homemade 394cc v8 bike on youtube made by a guy named Dennis Franz. He made the aircooled beast by hand without any plans of course his didn't have pedals and I don't really think there would be any room for pedals either. HE...
  9. Will'smotobikes19

    GX160 bike

    Hey guys I just was wondering what you think about building a gx160 motorized bike. I saw a vid on youtube of a kid passing cars on a bike with a gx160 and apparently he can go 50mph! Thats as much as a 212cc but with smaller displacement of course he did remove the gov but I think they do make...
  10. Will'smotobikes19

    First ride on 79cc predator

    Hey guys I rode my latest build for the first time today and ran into a few problems first problem was the motor seemed to be shaking for some reason and then I always had to pedal to get the bike going or it will just vibrate the whole bike violently I dont know if its the way the throttle is...
  11. Will'smotobikes19

    My 79cc predator bike

    My 2nd build a hf 79cc on a micargi predator with front suspension, 180mm front disc, American 5/16 bolts on the motor mount and chain tensioner, Italian made #415 chain, NGK bp5hs plug, wrapped exhaust, cnc 40 tooth sprocket, rear coaster brake, 3L gas tank, cnc grips/throttle.
  12. Will'smotobikes19

    118cc lifan build

    Hey guys first post on here I was intrigued by the idea of using a lifan 4mhp engine and was wondering if anyone knows anything about it. Is it a Honda clone? Can racing parts be used in it? (Gx120 parts) I already know it is a 0.75 in or 3/4 shaft. It may be possible to use the 79cc...
  13. RocketJ

    4hp cruiser progress

  14. RocketJ

    4hp briggs cruiser project

    We finally hit a break in the weather in upstate New York, so I took the opportunity to work on my btr/powerplus bike. This bike originally started out as a sportsman flyer with a cheap china girl slapped on, but I soon realized that it just wasn't doing the bike justice. I ripped out the old...
  15. RocketJ

    In need of a belt drive shifter

    Hey guys, I'm looking for a shifter similar to what you would see in indian powerpluses or very old belt driven harleys. Arien snowblowers have a nice speed shifter but there are none for sale cheap near me. I live in new York's capitol region. If you have one please let me know.
  16. C

    My motoped Frankenstein

    So ive been reading these forums for years for insight into my builds( ive done 6 or 7 66cc 2 strokes) but i have had more issues than i care to think about. Mostly needle bearing failure, and a couple stripped crank studs. So ive been debating a four stroke build like a 79cc predator but for...
  17. RocketJ

    Let's build a morgan 3 wheeler?

    I'm sure you've seen it at some point on tv or the internet. A 3 wheeled, v twin powered trike with a hundred year old history. Usually, these beautiful machines would go for 30+ grand, but what if they were built out of bicycle parts instead? My idea is to use a 212cc predator, 2 front...
  18. H

    79cc predator build.

    Hello, I am looking to build a 79 cc predator bike. I will be using the EZ matic transmission for the build. I think I will be using the gas bike motor mount, unless you guys/gals recommend a different mount. Some questions I have about the 79cc hf motor is. What's the rough mpg like? Will...
  19. B

    best oil for a 4 stroke

    I have a huasheng 4 stroke and I'm trying to figure out what oil to use can someone help me out here
  20. CrazyDan

    7/8" flex pipe for 4 strokes

    I found a cheap source for 7/8" galvanized flex pipe for exhaust sold by the foot...