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Brakes 
Driveline 
Electronics 
Handlebars & Controls 
Package Deals 
Wheel Accessories 
Wheels by Vehicle 
Tools and Maintenance 
Universal & Repair 
Vivid Racing Gear 
Features:
- Designed specifically for the performance demands of popular racing MX Bikes and Quads
- Pistons designed to maintain the stock compression after the effects of the dished stainless valves
- 2618 Alloy Fully CNC Machined Piston with performance skirt coating
- Black Diamond Stainless Steel conversion system significantly increases valve durability
- Lightweight Racing Spring Kit compatible with high performance cams
- All of the gaskets, rings, pins and seals required for a top end rebuild
- Includes Piston, Rings, Clips and Pin
- Includes Top End Gasket Kit by Cometic
- Includes KPMI S.S. Black Diamond Valves, Stock Head Dia.
- Includes Dual Spring Titanium Retainer Spring Kit, Which Allows for 0.440" In. and Ex. Valve Lift
Fitments:
- Yamaha YFZ450R 2009-2020
Other Part Numbers:
KPMI #191-44035K
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
KPMI (Kibblewhite Precision Machining) is a global manufacturer and distributor of valvetrain and specialized tools and components for the racing area. The KPMI product line comprises of Harley-Davidson motorcycles, sports bikes, valves, dirt bikes, ATVs, UTVs, tourers, cruisers, customs, and classics, as well as Jet Skis, Water Skis, and watercraft.
History of KPMIJames L. Kibblewhite formed the legacy of Kibblewhite Precision Machining, Inc. in 1939. In 1989, James’s son, William F. Kibblewhite, took over the operation. William Kibblewhite built on his father's good work and added a lot more products to the line of the automotive industry.
KPMI EXPANSIONKPMI maintains a warehouse and supplies over 3,000 items to its consumers worldwide. There is no other company in the world that has such a wide range of products for the motorsports industry. Not only does KPMI manufacture finished products, but it also provides contract manufacturing services to OEMs and other third parties. Engineering, prototyping, and limited or full production runs are just some of the services they offer.
KPMI INNOVATIONKPMI has five locations and a combined total of over 20,000 square feet of a machine shop, office, engineering, and warehouse space. KPMI has invested heavily in upgrading its operations during the last five years. As a company, they have eleven cutting-edge CNC lathes and other cutting-edge tools in their entire facility.
KPMI QualityKPMI's objective is to supply consumers with products that function correctly the first time and deliver the best value for money in terms of reliability and performance. None of their products reaches final approval without first enduring a development flow procedure. Three signatures from engineering and one from production are required for final evaluations. This means that each product undergoes three independent assessments throughout its development process before a final product is launched.
VIVID RACING- KPMIVivid Racing includes a wide collection of KPMI valve products, such as exhaust and intake valves, wrist bushing twins, service kits, seal valves, spring kits, and many more!
| Sale price | None | ||||||||||||
| Wholesale price | $500.31 | ||||||||||||
| Shipping |
Weight: 1.71 Length: 8 Width: 8 Height: 3
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| Product Added At | Friday 13 August, 2021 | ||||||||||||
| Product Modified At | Friday 11 July, 2025 | ||||||||||||
| Imported By | ETLOverride | ||||||||||||
| Last Edited By | WPS_FTP_AVD | ||||||||||||
| View In Admin |
| Carb Approved | Yes |
|---|---|
| Carb Number | - |
| Epa Status | - |
| Prop65 | - |
| Carb Required | - |
| Vendor | Inv | Cost | Retail | Jobber | MAP | Core | Updated | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Western Power Sports | $423.99 | $736.95 | ? | $736.95 | ? | 2025-07-11 11:07:41 |
