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CP Pistons Yamaha Raptor 660 ATV Piston Kits Standard Bore, Big Bore and High Compression

Yamaha ATV CP Pistons Logo 660 Raptor

CP Pistons, for those that demand the ultimate in engine performance!

High performance and racing Yamaha piston kits are available from CP Pistons for all model years of the Raptor 660  four stroke ATV's. Standard bore size and big bore Raptor 660 CP Pistons Yamaha ATV kits are all available here. We also have 660 Raptor high compression piston kits. These forged pistons will work with oversize valves as well as high lift camshafts as they include oversize valve reliefs. They incorporate a "X" style forging for greater strength, durability and reduced weight. Along with the full radius dome designs, high performance piston rings and lightweight piston pins, these pistons offer the highest quality and are engineered for maximum power output.

CP Pistons ATV racing pistons are used by top professional riders and teams including:

Team Suzuki Ricky Carmichael Ivan Tedesco Ryan Dungey
MDK Speed David Vuillemin Nick Wey
MDK/Lucas Oil/Yamaha White Bros. Yamaha Rick Ware Racing Team Solitaire

Yamaha Raptor 660 atv cp pistons

Standard Features included with each Yamaha Raptor 660 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 include:
Piston
Piston Pin
Piston Rings
Pin Locks

Cometic top end gasket sets 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.

Click on the part number in the table below for pricing or to order the piston and, or head gasket of your choice.

660 Raptor 2005
Stock Bore is 100mm (3.937")
Stock Stroke is 84mm (3.307")

Part # Bore Size Cubic
Centimeters
Compression Top End Gasket
Kit #
Installation Notes
cp m1015 100mm std. 660cc 11.0-1 cp c7798 deglaze cylinder
cp m1016 102mm +2mm 686cc 11.0-1 cp c7798 bore and hone
cp m1017 102mm +2mm 686cc 12.0-1 cp c7798 bore and hone
cp m1018 102mm +2mm 686cc 12.5-1 cp c7798 bore and hone
cp m1019 105mm +5mm 727cc 12.0-1 cp c7909 requires sleeve or cylinder