2 stroke

  1. J

    Bucking bar sticking out too far......?

    It started yesterday, I put around 20 miles on the bike throughout the day, everything was running perfect. When all of a sudden the bike began to high rev and I lost power. The clutch would not engage with the handle released ( and all was adjusted fine). The rear wheel was free spinning...
  2. J

    Missing clutch cover spring....? needed or not?

    So I've put near 2000 miles on this motor in the past. It has been sitting for about a year until this new bike build. I opened the clutch cover to grease and adjust the clutch as needed. And I noticed the spring under the clutch pad cover is missing. Now obvously, the spring is not completely...
  3. Will'smotobikes19

    Best carb for 74cc stroker engine?

    Hey guys just wanted to ask what carb setup you guys recommend for a 48mm bore x 41mm stroke engine I'm building. The ports are 40mm. Would a 19mm delorto clone with a #90 jet be good? it is a iron lined cylinder.
  4. Will'smotobikes19

    New performance build questions

    Hey guys I just purchased some parts for my next bike build. I got a 48mm iron sleeved cylinder, windowed flat top piston, 3mm stroker crank, an ebay 66cc/80cc kit also the smaller saucer style high compression head, regina chain #415 and some cnc aluminum grips. An ngk b5hs as well. Since I'm...
  5. K

    Engine Trouble Cylinder coating question

    Can anyone tell me whats going on here what is that residue on the cylinder ,also is this cylinder coated, and if it is how thick is it, can it be bored to remove the old coating and re-coated ?, its a Kawasaki cylinder from the 70s , were they originally coated from the factory ?
  6. Will'smotobikes19

    Belt drive 2 stroke budget build

    I've just been going through ideas I had after looking at a few old weedeaters, of course these engines are very small I wouldn't go under 25cc and pedalling would be neccesary. If you could attach a pulley to the shaft while still keeping the pull start then you could build a mount for the...
  7. Will'smotobikes19

    Inline twin 132cc 2 stroke

    Hey guys I had another idea in the area of frankenstein engines, take 2 regular 66cc jugs and make a new crankcase and crank from a homemade mold based on the regular crankcase only wider and meant for 2 cylinders, therefore having a 132cc monster! or even use the 48cc cylinders that would be...
  8. Glenng

    is the rear wheel supposed to move with good force when clutch is engaged

    Is the rear wheel supposed to move with good force when clutch is not pressed? when i push the bike with good force without pressing the clutch it moves forward an inch or two and makes a burping noise. Is this normal i think i remember the rear wheel being totally locked and unable to spin at...
  9. Will'smotobikes19

    50cc inline twin 2 stroke

    Hey guys just want to talk about an idea I had. They make snowmobile engines that are multiple cylinder 2 strokes right?. What if you could scale one down and have an inline twin 2 stroke say 50cc so 2 25cc cylinders wouldn't that be cool? should rev really high too. Has anyone attempted to make...
  10. Will'smotobikes19

    49cc Pocketbike engine on bicycle?

    Hi guys I was just wondering if anyone knows if the huasheng 49cc 4 stroke gearboxes will bolt onto the 2 stroke pocket bike engines. I know they're a bit under powered but they're pretty cheap and you can get an upgraded version of them and they have a centrifugal clutch too. I've seen 2 or 3...
  11. Will'smotobikes19

    Tips from what I've learned

    Hey guys just wanted to let anyone that needs some tips have some. * Don't use rag joint sprockets they always become untrue and are dangerous use the cnc adapters or hard mounted sprockets instead. * Don't skimp on China chain there is a company called Regina chain that makes #415 and it's...
  12. Q

    Break In Proper carburetor tuning during break in.

    Hello everyone, I would like to ask you about my problems with 80cc engine I have. I am trying to break it in properly, as instruction says. I use 1:16 semisynthetic oil mix with 95 unleaded gasoline. Problem is low top speed - about 20mph(30km/h). Engine starts four stroking above that speed...
  13. 6

    What else can be done to maximize shitty Chinese engines

    So far I’ve replaced every shitty, self stripping nut and bolt I can. I live in the US so finding metric bolts is sometimes a challenge. I reinforced the engine mounts and chain guide and placed make shift rubber shocks between the frame and the engine to stop it from shaking so hard the chain...
  14. J

    Wet magneto coil

    I'm new around here, is it possible for the coil to fail when it gets wet. (i am getting no spark) I was driving around in the rain and the bike was fine, the next day i got start it and nothing. I replaced the plug checked resistance on the cdi and on the coil and there was resistance showing...
  15. Baconator101

    Bewildered and lost, 2 stroke china girl

    I was lost for a while in the labyrinth of videos that is YouTube when a thought occurred to me. Have any of you folks used the Common 2 stroke 66cc for anything other than means of tinkering and transportation? Would it be good for anything? Generator? Pressure washer? Im not talking about...
  16. Baconator101

    Centrifugal Clutch Fix?

    My clutch bell just detached itself from the small gear cog. It seems as though it was just pressed in, no solder or weld marks on it. If not fixable anybody have any luck on purchasing a decent quality one lately?
  17. Cooters Carport

    Nitrous

    How many people have used nitrous on these 2 stroke engines? If so how did the engine take it?
  18. C

    What is the fuel oil ratio to run E85 in a 2 stroke bike motor?

    I want to run my bike on E85 but idk what the fuel oil ratio to run it with.
  19. Matt Barrack

    Chainsaw VS Kit Engine

    So I got an old chainsaw that works very good. I also have a motoried bike with an engine from one of the kits you can buy. Would the chainsaw engine work better than the one from the kit? I know I made a thread like this earlier but this is more specific to my build. The current engine is a...
  20. S

    Engine Trouble Will start for less than 5 seconds

    I will start my bike, it will run and keep going slower and slower over 3-5 seconds and get really rough then when I pull the clutch it shut off. What could this be? I just bought it and it's brand new bike. When I got it running, if I pull the clutch or let go of the throttle it will also...

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