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Cylinder Head Service Kit, 0.450" Lift, Yamaha®, Various 660's, 2001-2008

Cylinder Head Service Kit, 0.450" Lift, Yamaha®, Various 660's, 2001-2008


Regular price $532.75 USD
Regular price $532.75 USD Sale price $532.75 USD
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California Prop 65

Yamaha® Grizzly™ 660 2002-2008
Yamaha® Raptor™ 660 2001-2005
Yamaha® Rhino™ 660 2004-2007

KPMI® is proud to introduce full CYLINDER HEAD SERVICE KITS. These kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt / MX and Side x Side models with KPMI’s top quality racing valvetrain components.


  • Save time money on your next cylinder head rebuild
  • One package, everything you need for factory recommended valvetrain service
  • Double your service life over OEM using KPMI® Valvetrain products
  • Kitted with value added savings

Kit Includes:

  • Dual Spring Titanium Retainer Spring Kit, Which Allows for 0.350" Valve Lift
  • Top End Gasket Kit by Cometic
  • KPMI® C630 Bronze Standard Valve Guides
  • KPMI® S.S. Black Diamond™ Valves, Stock Head Dia.

The product image may not be accurate on the page. Please refer to the description and specifications before purchasing.

Installation Instructions Click Here
Type Intake/ Exhaust
Retainer Material Titanium 
Valve Lift 0.450"
Installed Height 1.205"
Seat Pressure 55#
Open Pressure 145#
@ Lift 0.450"
Valve Type  Intake/ Exhaust
Valve Material Black Diamond™ Stainless
Coating Black Nitroneg
Intake Head Diameter 30.00mm / 1.181"
Intake Stem Diameter 6.0mm/ 0.2355"
Intake Tulip 15º
Intake Overall Length 3.960"
Exhaust Head Diameter 32.00mm / 1.260"
Exhaust Stem Diameter 6.0mm/ 0.2348"
Exhaust Tulip 25º
Exhaust Overall Length 3.650"
Remarks Standard
Guide Type Intake / Exhaust
Guide Material C630 Bronze
Reference See Figure 1
Intake Outside Dia.: (G) 0.4550" / Std.
Intake (A) 0.315"
Intake (B) 0.350"
Intake (C) 1.125"
Intake (D) 1.225"
Intake (E) 0.495"
Intake (F) 0.2345"
Exhaust Outside Dia.: (G) 0.4550" / Std.
Exhaust (A) 0.440"
Exhaust (B) 0.475"
Exhaust (C) 0.860"
Exhaust (D) 0.990"
Exhaust (E) 0.495"
Exhaust (F) 0.2348"
Unique Identifier No. FR327789_01GAUSt
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