buying an motor from ebay

Discussion in '2-Stroke Engines' started by gabe11501, Mar 2, 2016.

  1. gabe11501

    gabe11501 New Member

    so my father ends up buying the 80 cc engine kit from ebay...i put everything togeather and everything worked it just doesnt has spark and compresion..should i get a racing carb?

  2. bakaneko

    bakaneko Active Member

    Not too often do these things start up right away unless you had small engine experience. I am sure folks here will help get it going. When you release the clutch does the motor turn over? Also remove the wiring for the kill switch if you haven't done so.
  3. crassius

    crassius Well-Known Member

    a new motor is dry inside & can suck up a lot of fuel/oil before it finally starts
  4. gabe11501

    gabe11501 New Member

    i had the motor running great but i just stoped working lol..maybe i blew the bearings inside???lol

    i am going to remove the kill switch..

    The motor seems to be having alot of gas running through it because the spark plug has tons of gas on it.

    yes the motor turns over .as i pedal its like it wants to run but it just doesnt..

    i was thinking at first maybe these cheap carbs suck .but i see so many people with them lol..
  5. bakaneko

    bakaneko Active Member

    Yeah, the carb is simple but does the job. I suspect that it is either improper or dislocated wiring (they do fall out, i have to tape mine...) or the kill switch. Let us know what happens.
  6. HeadSmess

    HeadSmess Well-Known Member

    of course you should!!!! a racing carb will fix everything and let you blow corvettes and mustangs away every time you touch the throttle...

    thats being sarcastic, if you cannot tell.

    save your money, try dismantling the carb you have and learning something.

    sounds like one of two things happening...

    the needle valve in the float bowl has gunk in it, and isnt closing properly.

    or, the jets come loose.

    there could be other issues, but for now, with what info you have given us, assume its one of those things.

    you could just rip the carb off, pour a bit of fuel down the intake, attempt to start it... and if it doesnt start, you know that the carb is fine, its something else being annoying instead. which could be anything from a lousy plug to a popped crank seal...

    you have to look at them as three separate systems, and tick each one off the list systematically. starting with the carb/fuelling.
  7. gabe11501

    gabe11501 New Member

    its starts a little bit and shuts off while in still pedaling..i checked the carb fully did a cleaning even though it wasn't dirty..the float ,jet needle..i have experience in this field i mean i had so many gopeds ,,,pocket bike gokarts,, finishing up my chopper bike... at this point i really think i poped the crank bearing out because i did run it my next step is to do a fully inspection on the motor inside..i will probably port it ..make a legit muffler and buy a racing carbb..i really want to make this a nice bike for my father after all i am using his garge lol...
  8. gabe11501

    gabe11501 New Member

    i am taking a kill switch off ..makes no sense for a kill switch..
  9. gabe11501

    gabe11501 New Member

    the motor was running fine then the next day it doesn't want to start ..hmm that just doesnt make sense??
  10. bakaneko

    bakaneko Active Member

    Double check the wiring and take off that kill switch and then try it again. Let us know.
  11. gabe11501

    gabe11501 New Member

    thanks for the advice will do thank you bakaneko
  12. Joshbus

    Joshbus Member

    I know it's a year later , but if it ran fine a day before it's probably a weak magneto , or the float is out of adjustment , so it's just flooding out on you. If you never changed the stock jet drop it down to a 64 , I've had great luck with 64 on a few stock motors. Play with the carb needle too start with the clip on the second notch from the top , and work your way down until your plug is showing a tan color.