Description
KPMI? valve springs are wound from Premium Kobe Super-Clean Chrome Silicon Wire. KPMI? valve springs are heat-treated, stress relieved, and shot peened to insure maximum performance and life. Springs are engineered for each specific application using proprietary advanced spring design simulation, and analysis software. Engineers pay special attention to cam and spring harmonics, stress, mass, and operating rpm.
Features:
- 80 Lbs of Seat Pressure / 205 Lbs @ 0.435" Lift (Max)
- Spring kit is designed for compatibility with the OEM integrated Seal/Base (OE# 3610212) where applicable
- Lightweight heat treated Steel Retainer and Beehive Spring reduce reciprocating mass while providing the spring forces required by high performance boosted racing applications.
Fitment
Yamaha WR250F 2001
Yamaha WR250F 2002
Yamaha WR250F 2003
Yamaha WR250F 2004
Yamaha WR250F 2005
Yamaha WR250F 2006
Yamaha WR250F 2007
Yamaha WR250F 2008
Yamaha WR250F 2009
Yamaha WR250F 2010
Yamaha WR250F 2011
Yamaha WR250F 2012
Yamaha WR250F 2013
Yamaha YZ250F 2001
Yamaha YZ250F 2002
Yamaha YZ250F 2003
Yamaha YZ250F 2004
Yamaha YZ250F 2005
Yamaha YZ250F 2006
Yamaha YZ250F 2007
Yamaha YZ250F 2008
Yamaha YZ250F 2009
Yamaha YZ250F 2010
Yamaha YZ250F 2011
Yamaha YZ250F 2012
Yamaha YZ250F 2013
