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2 stroke engine

  1. D

    2 stroke 80cc bike engine kit questions

    I just mounted a 2 stroke 80cc engine kit On my bike that I bought off eBay. First, whenever I pedal and get the engine going it literally just takes off full speed. I pull the clutch back in and takes off even faster. The first time I got it running I could not brake normally but for whatever...
  2. Joshyaddow

    Which motor should i go with

    so I now have a seeutek pk80 80cc and I love it.. its my first build.i want to build another setup so im here to ask what motor i should go with i was thinking of the zeda 80 firestorm thats on Amazon or the YD 100 I have done a little research on each one im undecided at this point any and all...
  3. Ethelegend

    My 80cc motorized bike is starting but not accelerating and it shuts off when I hold

    My bike doesn’t accelerate when I use the throttle it starts perfectly fine but doesn’t accelerate at all and it completely shuts off when I hold the clutch to slow down I don’t kno what’s wrong
  4. C

    No power in engine

    I recently completed my first build, and I thought I put everything together correctly. After filling the tank with 1:16 oil gas mix, I attempted to start it like everyone does by pedaling with the clutch pedal squeezed, and then slowly letting the clutch engage as I hold down the throttle. When...
  5. J

    Regular start stops

    Hi, Due to the bikes not being strictly legal I have taken to cycling 2/3rds of the time and using the engine to blast up hills or pick up speed on quiet roads. In doing so though am I damaging the engine or clutch? When cycling I just clip the clutch in and peddle.
  6. J

    Schwinn Meridian 2 Stroke Conversion.

    Hello, I have a schwinn Meridian adult tricycle and wish to convert it to running on a 2 stroke engine. I already have a 2 stroke 80cc bike conversion engine at home that I want to use and a sprocket for the Meridians rear axle on order but I am having difficulty mounting the engine on the...
  7. xspade17x

    2 Stroke Mountain bike with shift kit build.

    This is now my 4th bike build and I wanted to show everyone as I go to get feedback. I was unhappy with my results on my last 3 builds. Also, I've found this forum to be a really helpful, friendly and informative community, anyway here it goes. So in excitement, I impulsively purchased the HD 2...
  8. B

    Occ Chopper speedometer

    I have a schwinn occ chopper, that I am currently doing a 2 stroke engine kit conversion. I wanted to put on a speedometer (the retro style). But all the newer version ones I see fit 26" and 27" wheels, but my front tire is 24". Does anyone know were I can get a cheap retro style speedometer for...
  9. S

    Performance Carb Jetting

    I bought an HP Performance carburetor for my 2-stroke motorized bicycle to replace my NT carburetor. As of right now, my NT carb blows the performance carb out of the water. I'm guessing a jet issue? It cranks right up but, lacks power, torque and top speed. Anybody have ideas about what jets I...
  10. S

    HP Performance Carburetor Jetting

    I bought an HP Performance carburetor for my 2-stroke motorized bicycle to replace my NT carburetor. As of right now, my NT carb blows the performance carb out of the water. I'm guessing a jet issue? It cranks right up but, lacks power, torque and top speed. Anybody have ideas about what jets I...
  11. R

    Chain slips off rear sprocket

    I'm am desperate for some help here and need some advice. I have a 49cc 2 stroke bike motor attached to a 26 inch giant beach cruiser bike. Everything is hooked up ready to go but no matter what I do my chain continues to slip off the back sprocket. I bought a spring chain tensioner which helps...
  12. B

    Engine Trouble Conrod bearings

    Im wondering if anyone knows some better quality little end and big end needle bearings for a 48cc motor, I've just had another one blow up due the big end splitting up and im in the process of pressing my crank apart to hopefully replace the big end pin and bearing with one from a ktm 50cc but...
  13. kuliffix

    How to Motorized Bicycle

    Hello guys, I also built a motorized bike. In these videos is a sort of guide on how to assemble a engine kit for a bike, In which are shown issues that I had to deal with during the montage and their resolves. The bicycle rim was a testing one, to test out how the engine and all the parts...
  14. Eddie Medley

    Engine Trouble Make engine shiny

    How was wondering if I could make my 80cc 2 stroke engine shiny I was going to buy a black one but and take the black paint off and make it shiny or chrome like if you know how or lead me in the right direction. That be greatly appreciated.
  15. J

    Help!! I don't know what to do!

    Hi, I am a beginner to all of this kind of stuff, so excuse me if I have to describe what something is if I don't know the name. So I bought my bike off a guy who builds bikes for a living (he has done it for 8 years so he knows what he is doing). I texted him about this issue and he doesn't...
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