1. S

    O ring keeps popping off rear wheel hub

    Hello, I have a 66cc two stroke engine on a hyper cruiser bicycle. It went great for the first few miles but now the o ring keeps popping off the rear hub releasing the bicycle sprocket and I can’t pedal or stop (using coaster brake). I reseat it and it pops off within minutes anyone have any...
  2. J

    I've done everything and still no start

    I got a 2 stroke, 80cc kit a couple weeks ago and built it in a day or so but for the last 2 weeks I have been trying to start it almost everyday and I get nothing. I pedal, get some speed, ease on the throttle and pop the clutch and there is not even the faintest semblance of engine combustion...
  3. N

    My clutch used to work, but it doesn't now!

    I have a motorized 2 stroke from bikeberry, and the clutch on it used to be totally fine! Once I decided to remove the clutch cover, and gear cover, I decided to re- assemble everything back together. I noticed that after I put the ball bearing, and bucking bar back in, it stuck out way to far...
  4. N

    Engine failure and Wont start

    I've run almost 5 tanks of gas and it's well broken in and been running great. I was about 15 mles into a trip going around 30mph and the bike lost power (full throttle got me 20 mph). I tried to shut it off but nothing happened so i braked to a stop which cut the motor off. It then smoked (from...
  5. S

    Bike not starting

    Hey all, So i'm not sure if this is the right forum for this so if its not direct me elsewhere… anyway, I'm having issues with my motorized bicycle. I peddle it to get started but when i release the clutch and give it throttle nothing happens. It sounds like the engine is going but it's...
  6. TheNecromancer13

    Chainring Bolts Unscrew Themselves Like Clockwork

    So I have a rear sprocket attached to an adapter that mounts onto a disc brake mount, and the chainring bolts that attach the sprocket to the adapter keep unscrewing themselves no matter what I do. I used threadlocker on them last week, and they still unscrewed themseves! They do it within a...
  7. Target

    Engine Doesnt Engage Drivetrain

    Hello, just want to ask for some help. I've had numerous chain issues and the wheel locking up when the motor is running as i'm still working out the "kinks". It seems when i let the clutch go, the engine starts but doesn't move the bike anywhere when the clutch is let out at it's fullest, at...
  8. TheNecromancer13

    Spark plug wont fire in cylinder

    So my spark plug fires just fine when I hold it against something, but when I try to get it to fire in the cylinder it wont fire no matter what I do to it. Any ideas? The engine is a grubee skyhawk raw racer 66cc and I assembled it last night and now can't get it to start cause of this.
  9. Matty Skacore

    bicycle rear wheel problems

    I need help my rear wheel broke while I was riding, when i pedal the crank freely moves but it doesnt move the rear wheel. The casset moves freely instead of resisting when you push forward. It is on a single speed mountain bike btw
  10. R

    Sprockets and such. Second noob post of the day!

    Ok, so I've never built a chain driven bike before and I have a question concerning the sprockets on the rear wheel. How can I keep the pedals attached and functional while adding another sprocket to the back wheel for the engine to drive? If I just slap another sprocket on it, It would still...
  11. kdaddy1980

    Engine Bogging/Low Torque

    Ok guys, here we go again. Yesterday i went to ride my bike and it was really hard to start..then all the sudden it kicked in and ran good, but when i give it a good throttling it cuts out and wants to die. The engine revs really good without the clutch engaged but as soon as i engage the clutch...
  12. Mr. Minecraft

    Summer Job Build Thread

    Hello everyone! This summer I have planned to build and sell motorbikes for some easy cash. I am not the kind of person to constantly update a thread with everything I do, so I am only going to post when I finish a bike, and will update the post when I sell the corresponding bike. I really don't...
  13. A

    Can I Make This Work?!?!?!?!?!?! I'm new here.....

    I have a Trek mountain bike that i want to put a Flying Hourse 66/80cc kit on from I have not ordered it yet because of a little problem i might have. Now the problem i'm having some trouble with right now is the four shifter cables that run along the top of the down tube...If i...
  14. 80ccstingray

    Idle/Carb problems

    Hi everyone! I have a RAW 80cc bike engine kit with a stock NT carburetor and it idles very fast and stalls randomly. I adjust the screw on the carb and it does nothing, it still idles fast. Can someone help me? Any ideas or suggestions are welcome. -Thanks
  15. W ripoff help please?

    Aloha Forums, So i ordered a gasbike the starfire 66cc and I was very excited about it. During shipping i would watch tutorial videos & read instruction manuals so i could just put it together quick and ride it to work and school. Turns out upon shipping and receiving it came broken...
  16. R

    I cant keep it running!!! Please help

    I’m having a problem keeping my bike running. I just built my first bike with a Grubee GT5 Motor, took it out and it fired up right away with a 16:1 fuel mixture (like recommended). My problem is that I can’t keep it running. If I turn the lower petcock lever all the way to open it feeds way...
  17. merchant810

    grubee skyhawk reaches maximum rpm and revs out of control

    so this is my first post and my first purchase. I have built a occ chopper bike and everything is in position. I purchased the grubee skyhawk and am so lost on how to fix my problem. First of all my bike only runs if choke is all the way down on the gear shifter style. if i move up at all it...
  18. S

    Different type of carb problem.

    Hey all, I'm new here. I bought a used motorized bike from someone nearby off of Craigslist and I've had nothing but problems since then. Luckily the man also included a box of parts, among which was an entire new engine assembly, chain, tubes, etc. My brother found a nice mountain bike and...