2-stroke engine head troubles?

Discussion in 'General Questions' started by Kabs, Apr 17, 2015.

  1. Kabs

    Kabs New Member

    So i've been running my bike for a few weeks now, and it was starting to make a loud "spitting" noise when i went above half throttle, so i was testing my electrical but it's all working fine and then I realized there was air spitting out of the left side of the motor so i tightened the 4 nuts on top of the head which caused the spitting to stop, but only lasted about a minute before stopping itself. I've been playing with the tightness of all 4 nuts but it keeps trying to catch but wont, Ive almost made it catch with tightening the nuts. I'm pretty sure it has to be the engine head, any thoughts please? Thanks a lot!!

    Using a Grubee Skyhawk 66 cc

  2. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

    Your aluminum head gasket is blown.

    No amount of tightening will fix it.
    If you tighten the bolts too much you may cause damage.

    Get a new head gasket and replace it.
  3. jaguar

    jaguar Well-Known Member

    the head mating surface is not perfectly flat.
    Use sandpaper on glass to grind it flat.
    buy gasket material from the auto parts store and make your own gasket.
    that aluminum gasket is now warped to match your warped head. throw it away.