We offer the entire line of CP Pistons brand forged high performance and racing Yamaha Raptor 250 piston kits. CP pistons manufactures premium quality Raptor 250 pistons for all model years of the 250 Raptor four stroke quads. On this page you will find listings for Raptor 250 pistons in standard bore size and also Raptor 250 big bore piston kits which build the engine into a 270cc displacement size. Raptor 250 pistons are available in 74mm and 77mm bore sizes. We also have several compression ratios available including high compression Raptor 250 piston kits.
These forged 250 Raptor pistons will work with stock size and oversize intake and exhaust valves. They will also work fine with stock or high lift camshafts as they include oversize valve reliefs. They incorporate a "X" style forging for more strength, endurance and lighter weight. These Yamaha Raptor 250 pistons feature full radius dome designs, high performance piston rings and lightweight piston pins. CP Pistons Yamaha Raptor 250 piston kits and Cometic Raptor 250 gasket kits offer superior quality and are designed to provide maximum horsepower and outstanding durability.
CP Pistons forged high performance racing pistons are used by top professional riders and teams.
|Standard Features included with each Yamaha Yamaha Raptor 250 CP Piston Kit:|
|Double forced pin oilers||Fully CNC Machined|
|Accumulator groove||Pick lock removal grooves|
|Anti detonation grooves||X-style forging|
|Light weight pins||Balanced to + or - 1 gram|
Each of the below kits
Raptor 250 top end gasket sets made by Cometic are available separately, but are not included with the piston kit. The matching top end gasket kit for each application is listed in the table below, along with the individual piston kit info.
If you need bore and hone work done, a sleeve installed, or a new cylinder, we can help you with that also. Please contact us for assistance.
2008 - 2013 Raptor 250 Pistons
|Compression||Installation Notes||Piston Kit Part #||Top End Gasket
|74mm standard||249cc||11-1||deglaze cylinder||cp m1060
|74mm standard||249cc||12-1||deglaze cylinder||cp m1061
|74mm standard||249cc||13-1||deglaze cylinder||cp m1062
|+3mm oversize 77mm big bore||270cc||11-1||bore and re-plate cylinder||cp m1063
|+3mm oversize 77mm big bore||270cc||12.5-1||bore and re-plate cylinder||cp m1065