Motor won't start 80cc

Discussion in '2-Stroke Engines' started by Anthony_small_motor, Jul 23, 2016.

  1. Anthony_small_motor

    Anthony_small_motor New Member

    I recently bought a motorized bike that need some work. As of now after all the work i did it won't start and I'm thinking because of the clutch or spark plug. I can ride the bike normally and the engine wont make a sound.
     

  2. Frankfort MB's

    Frankfort MB's Well-Known Member

    We need more information!!!

    Is it getting spark???? Is it getting fuel? Air?
    Is the clutch lever pulled or not?
     
  3. crassius

    crassius Well-Known Member

    also, was it running when you bought it
     
  4. Anthony_small_motor

    Anthony_small_motor New Member

    No it was not running. It was not put togather enough. I put the carb. On and hooked up the throttle and choke. Then the clutch. Im still in need to buy a new spark plug but idk how to test a spark anyway. The clutch was pulled.and i opened the fuel for the brief time i was testing it to start.
     
  5. Frankfort MB's

    Frankfort MB's Well-Known Member

    When your trying to start the motor your clutch cannot be pulled.

    To test the spark plug take it out then pedal like your going to start and have your finger on the plug.
    If your plug is good then it will spark, if it doesn't then you need a new plug
     
  6. Frankenstein

    Frankenstein Active Member

    Lord have mercy
     
    Frankfort MB's likes this.
  7. Anthony_small_motor

    Anthony_small_motor New Member

    Still no start just ordered some new parts only 10 dollars. But once again there is no thud of the motor when i do anything. Which b4 l loosened some things the wheel was stuck and would only move with the motors chain and would "thud" every time i could get the wheel to move. What even would you call the "thud".
     
  8. Frankenstein

    Frankenstein Active Member

    If the clutch is out then the thud is the engine turning over. Did you torque the headbolts down to 15ft/lbs each? Maybe take the head off and check the head gasket, if it's busted or torn then the engine can feel like it's impossible to start. Recently bought a motor which has a cracked head, it wouldn't start for nothing, cost me 50 bucks for the whole kit almost new, and it was an 8 dollar fix. Problem was he never torqued the head down, just let it go out of the factory box.

    Look at head, and gasket, of they are messed up you'll need a new one of the broken, if nothings messed up, torque the head with a torque wrench, not by feel or by hand, to 15 foot pounds, there's a pattern to follow while tightening the head also
     
  9. crassius

    crassius Well-Known Member

    stop replacing parts till it is ready to ride - only then will you be able to tell what is needed
     
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  10. Frankenstein

    Frankenstein Active Member

    It's not ready to ride, he apparently can't even get it started, but a thud sounds like he can apparently turn the engine over with relative ease by moving the back wheel, if it's sealed properly then it should be way harder to do that than its sounding
     
  11. Ralord197769

    Ralord197769 Guest

    Keep it simple purchase a 2cycle manual.
     
  12. crassius

    crassius Well-Known Member

    OK, I'm confused - one must be riding the bike if trying to start it properly.
     
  13. Frankenstein

    Frankenstein Active Member

    I think what we are confused about is not the ability to physically ride on the bike, but being unable to start the bike, I say ride as in not being able to start the bike and use the motor to ride, otherwise I call it exercising.

    To be honest, I'm having some difficulty understanding exactly what's wrong with his bike, his grammar is kinda not good... If he posted pictures and described the problem like that it would be helpful.
     
  14. Frankenstein

    Frankenstein Active Member

    I still can't tell if there is a thud or no thud, then he says something about a spark plug, for all we know he put a way too long spark plug in and it's stopping the piston from turning over completely or something. Maybe his clutch is broken, maybe it's too tight and it's not engaging the motor, maybe nothing is wrong at all and he just didn't flip the kill switch to run and it's being a pain.
     
  15. crassius

    crassius Well-Known Member

    I think I'm getting this one mixed up with one in which bike isn't put together yet.
     
  16. jaguar

    jaguar Well-Known Member

    motor handicapped people should stick to non-motorized bicycles
     
  17. Frankenstein

    Frankenstein Active Member

    Bingo
     
  18. Frankenstein

    Frankenstein Active Member

    Well bingo, but actually not so bingo? My sister knew next to nothing before I built her a motorized bike, in fact she had difficulty even adjusting her regular bike brakes before it...

    Now she's riding around with a bag of tools fixing engine hassles all on her own, and it only took her 7 months to get the hang of it. Not bad really.
     
  19. crassius

    crassius Well-Known Member

    nothing wrong with being a noob - but it goes wrong fast when they fail to read & learn
     
  20. Ahmad Darwish

    Ahmad Darwish New Member

    What sort of sound it making when you release the clutch, do you hear the piston moving inside?
     
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