piston ring id

i need to buy a piston ring or two, and i need to know what type of ring. the choice is FG or GI, the moped in repair is a Minarelli 1977 super sport with a MO-1 engine. my best measurement is 40.40mm bore. thank you

Re: piston ring id

Try www. themopedwarehoue.com

This engine must be different from the V1. My book shows that the bore for the V1 engine is either 38 or 38.8mm.

Re: piston ring id

Jason Luther /

the mo-1 is a morini engine. the fg or gi is in reference to the end of the piston rings, and what shape the guide pin is in the piston groove. check the mopedjunkyard.com. they have a nice chart that shows everything you need to know about piston rings. if i remember correctly my mo-1 has gi ring ends. but double check to make sure

Re: piston ring id

Jason Luther /

Re: piston ring id

Jason Luther /

p.s. i would buy them at ikesbikes or handy bikes. they are much cheaper

Re: piston ring id

thanks silverfox and jason, you have helped me and now i will give ike a call.thanks much!

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