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

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 |

| 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 |
|