I am working on my aunts bike,it's a 1988 350 forman with very low hours on it. the problem i have is i think the rings are stuck around the piston,i checked the valves they are fine no bad gaskets. the way i always check for compresson is stick my thunb over top of the plug hole and it should blow it off . the bike sit for 10 years ,do you think kerosene would work by pouring it down the cylinder!

thanks davey

 

or tbps of oil