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Cylinder Head Service Kit, 0.450" Lift, Yamaha®, Various YZ™/ WR™ 450’s, 2014-'21

Cylinder Head Service Kit, 0.450" Lift, Yamaha®, Various YZ™/ WR™ 450’s, 2014-'21

SKU:80-82070

Regular price $418.67 USD
Regular price $418.67 USD Sale price $418.67 USD
Sale Sold out

California Prop 65

Yamaha® YZ™ 450F 2014-'19
Yamaha® YZ™ 450FX 2016-'20
Yamaha® WR450F 2016-'21

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.

Features:

  • 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 0.435" 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 1.185"
Seat Pressure 46#
Open Pressure 155#
@ Lift 0.450"
Valve Type  Intake/ Exhaust
Valve Material Black Diamond™ Stainless
Coating Black Nitroneg
Intake Head Diameter 37.00mm / 1.457"
Intake Stem Diameter 5.5mm / 0.2158"
Intake Tulip 20º
Intake Overall Length 3.280"
Exhaust Head Diameter 30.50mm / 1.201"
Exhaust Stem Diameter 5.5mm / 0.2155"
Exhaust Tulip 27º
Exhaust Overall Length 3.380"
Remarks Standard
Guide Type Intake / Exhaust
Guide Material C630 Bronze
Intake Reference See Figure 1
Intake Outside Dia.: (G) 0.4352" / Std.
Intake (A) ---
Intake (B) 0.540"
Intake (C) 0.560"
Intake (D) 0.775"
Intake (E) 0.432"
Intake (F) 0.2160"
Exhaust Outside Dia.: (G) 0.4352" / Std.
Exhaust (A) ---
Exhaust (B) 0.390"
Exhaust (C) 0.760"
Exhaust (D) 1.030"
Exhaust (E) 0.432"
Exhaust (F) 0.2155"
Unique Identifier No. FR327789_01GAUSt
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