how 2 fix my dna?

as m says compression is the probable cause,the head gasket consists of a rubber ring with four orings where the studs are ,a genuine gasket will last for a fair while but still end up turning to bubble gum and an aftermarket gasket will turn to bubble gum after a few weeks,check this first and after that go for the piston ,these bikes also suffer from water pump seals and cook the top end once it has lost all the water i would also suggest removing the thermostat if you do have the head off its scewed inside with two little philips screws.

adam bike doctor
May 2010

these do not have timing chain only the 125 and above do, do you have fuel? check your compression, any less than 90 psi it aint gonna run and needs stripdown, start with the easy stuff first

m
May 2010

haw to set timing chain

mark
May 2010