... &positive feedback... 3.Alloy spring steel. 1. Motorcycle piston ring 2.we can supply all kinds of SIZE ... , +1.0mm ,+1.5mm etc.3.we have other motorcycle rings .for example : CG125 ,CG150,CG175. EN125,GS125 ... 50,GY6-60,GY6-80,GY6-125,GY6-150 ,AX100,CG200,CBT125,QJ150J,CA250,XV250,QJ50-18,QJ50-10A ... international market. 5. There are all kinds of generator piston kits in my company : Such as : GX390. GX200 ...