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Raptor 660 YFM660 Big Bore Kit 102 mil Top End Hi Comp Piston Stage 2 Hot Cam


  • 102mm after market big bore cylinder
  • 12:1 CP or JE or forged piston
  • Hi temp piston rings
  • Wrist pin
  • Circlips
  • Top end gasket kit
  • Stud kit
  • Stage 2 Hotcam
  • Timing chain
  • Stickers

 Piston uses race gas only.  No case or head mods required.  Everything is new in the original packaging and the original manufacturer's warranty applies*. 

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Please check your order thoroughly when receiving it.  If for any reason at all you are not 100% happy please contact us right away so we can help resolve the issue.  If for any reason at all you are not happy with your order PRIOR TO INSTALLING PARTS you are welcome to return it for a FULL REFUND, NO QUESTIONS ASKED!

*We recommend that this kit be installed by a qualified mechanic with experience working on these types of motors.  Warranty does not include any failure that is a result of improper installation, improper tuning, improper break in, or misuse.  Piston comes with specific instructions for setting the ring gap.  If you do not follow these exactly your motor will fail.  For any warranty to be considered the part(s) in question must first be sent to us and possibly the manufacturer for inspection.  We can not warranty parts based on photos or phone calls alone.