There should not be a difference, they are both 105cc. As for the gas in the oil, you have gas that is not being burned going around the rings. However, I would take the bore to a machine shop and have it inspected. It may already be bored. On my 110, I had pitting in the cylinder and its at a machine shop now.
If I can restore this piece of junk, anything is possible.
My 83 (Well, now 85 thanks to a warped frame) 110 Build Thread http://www.3wheelerworld.com/showthr...3-ATC110-Build
My 1981 110 Build Thread http://www.3wheelerworld.com/showthr...44#post1179444
Thanks for the info. Also what should i be looking for to determine if the valves and valve guides are bad
Piston and rings were different between the 110 years but if you bought a new piston kit it will work for all years , ring thickness is the difference !!!!
Gas in the oil is telling me your float valve is leaking fuel into the motor , time for a carb rebuild .
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Thanks for pointing out the fuel in oil, didn't think about that.
If I can restore this piece of junk, anything is possible.
My 83 (Well, now 85 thanks to a warped frame) 110 Build Thread http://www.3wheelerworld.com/showthr...3-ATC110-Build
My 1981 110 Build Thread http://www.3wheelerworld.com/showthr...44#post1179444
thanks for the help