Scooter wont Rev

Discussion in 'The Workshop' started by Andy Collins, Jul 20, 2019.

  1. Andy Collins

    Andy Collins New Member

    Messages:
    27
    Hi Guys,, Im starting to get desperate. I cant get my mickey mouse chinese gy6 scooter to rev. So far its had a new carb, new cylinder head . new piston and rings , new stator. New vario pulley, new clutch. New plug.

    Other parts ive swaped are the coil and CDI unti nothing is making any differance. The tank fuel filters and tank vacum valve are working fine. It starts fine ticks over fine.. but u reach a fw 1000 revs and it starts how can i put it no longer run clean ? its struggeling... go back to idle and its fine... rev it its not...
     
  2. apriliars250

    apriliars250 Member

    Messages:
    101
    Does it rev OK with the rear wheel off the ground ?
     
  3. Stevep

    Stevep Well-Known Member

    Messages:
    5,898
    I'm guessing it's a 4 stroke? But what cc? 50 or 125?
    Either way, are you trying to run it with the airbox off?
    They won't play with the airbox off.
     
  4. Andy Collins

    Andy Collins New Member

    Messages:
    27
    Yes sorry 50cc four stroke... and the air filter was cleaned and replaced and is back on the scooter.
     
  5. Andy Collins

    Andy Collins New Member

    Messages:
    27

    No not really..... again reach a certain speed of revs and it starts to play up...
     
  6. apriliars250

    apriliars250 Member

    Messages:
    101
    You have seemed to replaced most things. Could possibly be a air leak around the carburettor intake manifold. Spay some carburettor cleaner around the intake when Idle if revs change then u would have a air leak
     
  7. Andy Collins

    Andy Collins New Member

    Messages:
    27
    Sounds logical ill give it a try !!! cheers for the tip
     
  8. Andy Collins

    Andy Collins New Member

    Messages:
    27

    That was it..... found a split in the gasket plus the O ring was damaged and not seating correctly. Repaired and now its like ive got a brand new scooter.... thanks a million !!!
     
    apriliars250 and Stevep like this.

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