Cylinder Head Service Kit

Solid Carbide Reamers

•  KPMI® solid carbide reamers provide long life and repeatability
•  Solid carbide, 6-flute design, share the chip load and ease the sizing operation
•  Extra-long-pilots for stability and alignment 
•  Ideal for: Manganese Bronze or Cast Iron
•  The KPMI® reamer diameters offered, provide recommended and optimum valve-guide-clearances


KPMI® Carbide valve guide reamers are manufactured from Solid Carbide and then heat treated and ground. All KPMI® reamers are ground to: +/- .0002”.  KPMI® carbide reamers are straight-flute and have a 6-flute design. The pilot portion of KPMI® reamers are 1.0” to 1.5” long.  Insert the pilot into a guide that you intend to size.  Using a hand held drill, apply honing oil or ATF before and during reaming a guide.  KPMI® reamers have been specifically designed for Manganese Bronze valve guides and Cast Iron. Do not attempt to use these reamers to size C630 Nickel Aluminum Bronze guides.  Also, once a reamer is used on Cast Iron, it’s not advisable to then use it on a bronze guide.

 

To learn more about these Kibblewhite®  Solid Carbide Reamers and other valvetrain related components,  
go to  
Tools and Components Section.

Steel Retainer Lightweight Racing Beehive Spring Kit and Components for Harley-Davidson® Milwaukee-Eight™ 2017-2018 

By taking advantage of the latest development in valve spring wire chemistry and manufacturing techniques, KPMI® has developed ovate wire Beehive style springs that will live and Perform at a high level in Harley Davidson applications. By coupling these developments with strict KPMI® design protocols and employing multiple design, simulation, and FEA analysis software, we were we able to overcome the torsional stresses unique to ovate wire springs that previously severely limited their operating parameters. This was critical, as there are nearly 100 camshaft part numbers available , these applications. KPMI® Beehive Springs are progressively wound using Kobe Super-Clean chrome silicon based wire that is heat treated and shot peened.  The hardened steel basewashers included in these kits are designed to locate the spring and control lateral movement. KPMI® made OEM replacement seals are included for a more complete performance valvetrain solution.

​To learn more about these Kibblewhite®  Lightweight Beehive Spring Kits and other valvetrain related components,  go to 
Harley-Davidson® King Milwaukee-Eight 2017-2018

Lightweight Racing Dual Spring Kits for Various Harley-Davidson® Applications

•  AV&V Style Dual Spring kits for 0.650” and 0.675” lift
•  Exact match for Installation Heights and Spring Pressures
•  Retainers designed for optimum rocker cover clearance
•  Includes Heavy Duty 9° H.T. Steel Keepers

•  Offer in Titanium and H.T. Steel retainers


Since 1938, KPMI® has taken great pride in our ability to design innovative performance improvements for valvetrains. This innovative ability has never been more apparent than with the development of the high tech lightweight racing valve spring kits for the incredibly stressed and torturous environment in today’s V-Twin engines.
The challenge to engineer a valvetrain that would outperform OEM systems was not an easy one. This task would require the concentrated efforts of every member of KPMI®’s design team. It was apparent early on that an OEM style spring with a bit more pressure was not going to be the complete answer for these engines. Working together as a team enabled KPMI® to evolve with a “unified system” approach. In fact, these innovative high performance lightweight valve spring kits, would not only outperform factory parts, but outlive them as well. 
Each KPMI® spring kit is designed for its specific application, taking into account several critical parameters including; cam profiles, harmonics, natural frequency of the springs, valvetrain mass, required pressure, wire stress, fatigue life, and engine rpm, just to name a few! 
Today KPMI® proudly offers complete high performance lightweight valve spring kits for a host of applications.


 

To learn more about these Kibblewhite®  Dual Spring Kits and other valvetrain related components,  go to 

Harley-Davidson® Evolution™ 1984-1999

Harley-Davidson® Evo Sportster™ 883cc 1986-’03
Harley-Davidson® XL™ 1100cc 1986-1987

Harley-Davidson® Evo Sportster™ 1200cc 1988-’03
Harley-Davidson® Twin Cam™ 88” 1999-2004

Lightweight Racing Spring Kit and Components for Suzuki® King Quad's 700-750 2005-2018 


Since 1938, KPMI® has taken great pride in our ability to design innovative performance improvements for valvetrains. This innovative ability has never been more apparent than with the development of the high tech lightweight racing valve spring kits for the incredibly stressed and torturous environment in today’s high revving 4-stroke engines. The challenge to engineer a valvetrain that would outperform OEM systems, that in some cases included titanium components, was not an easy one. This task would require the concentrated efforts of every member of KPMI®’s design team. It was apparent early on that an OEM style spring with a bit more pressure was not going to be the complete answer for these engines. Working together as a team enabled KPMI® to evolve with a “unified system” approach. In fact, these innovative high performance lightweight valve spring kits, would not only outperform factory parts, but outlive them as well. Each KPMI® spring kit is designed for its specific application, taking into account several critical parameters including; cam profiles, harmonics, natural frequency of the springs, valvetrain mass, required pressure, wire stress, fatigue life, and engine rpm, just to name a few! Today KPMI® proudly offers complete high performance lightweight valve spring kits for a host of applications.

We choose to use the copper based C63000 nickel-aluminum bronze as a material to make our bronze valve guides because of its ideal characteristics for the application. The 5% nickel content provides superior resistance to wear, and the approximately 80 percent copper content delivers outstanding heat conductivity. KPMI® guide profiles are designed to have minimal effect on the airstream while maintaining critical cross sectional thickness in high temperature areas, which promotes high performance and endurance.

​​All KPMI® Black Diamond™ Stainless steel valves are impregnated by a special German process to a depth of .002, with a surface build up of .0002. This Black Diamond process improves wear properties, reduces friction, and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis plating. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench. Black Diamond Valves are lightweight, strong, one piece forgings with profiles that provide excellent flow characteristics.
 

To learn more about these Kibblewhite®  Lightweight Racing Spring Kits and other valvetrain related components,  go to 
Suzuki ® King Quad's 700-750 2005-2018

Lightweight Racing Beehive Spring Kit and Components for Can Am® Maverick™ X3 2017-2019

By taking advantage of the latest development in valve spring wire chemistry and manufacturing techniques, KPMI® has developed ovate wire Beehive style springs that will live and perform at a high level in Can Am® applications. By coupling these developments with strict KPMI® design protocols and employing multiple design simulation and FEA analysis software, we were we able to overcome the torsional stresses unique to ovate wire springs that previously limited their operating parameters. KPMI® Beehive Springs are progressively wound using Kobe Super-Clean chrome silicon based wire that is heat treated and shot peened. KPMI® uses its tightly toleranced, FEA designed hardened Titanium retainers in these applications to ensure correct assembly height and resist keeper pull through. KPMI® made OEM replacement seals are included for a more complete performance valvetrain solution.


These Engine Builder valve guides have been designed with the price conscious builder in mind. Expect the same exacting KPMI® tolerances, but with a reduced toughness / wear-ability when compared to premium C630 Nickel Aluminum Bronze valve guides. The softer Manganese guides are easily reamed, and then can be delicately finished with our high quality ball hones. Now, with any battery operated or electric drill you can ream and hone manganese valve guides in less time and in the absence of expensive honing equipment required to properly size tough Nickel Bronze guides. Additionally, these guides have been designed to be compatible with our uniquely designed guide installation and removal tools. A relief in the seal detail allows for driving force to be applied without causing deformation in harmful areas.


All KPMI® Black Diamond™ Stainless steel valves are impregnated by a special German process to a depth of .002", with a surface build up of .0002". This Black Diamond process improves wear properties, reduces friction, and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis plating. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench. Black Diamond Valves are lightweight, strong, one piece forgings with profiles that provide excellent flow characteristics.
 

To learn more about this Kibblewhite® Beehive Spring Kit and other valvetrain related components, go to

Can Am® Maverick X3 2017-2019

 Cylinder Studs for Harley-Davidson® Milwaukee-Eight 2017-2018


•  Heat treated 180,000 PSI aircraft alloy steel
•  Centerless ground to remove material imperfections
•  Rolled threads for the strongest threads period
•  Black oxide treated for enhanced corrosion resistance
•  The M8 Cylinder Stud solution 


KPMI® Cylinder Studs are made from 180,000 psi yield strength, fine grain, heat treated, aircraft grade alloy steel.  When you want a stud that meets proof-stress and maximizes clamping force, look no further.  KPMI® “rolls” the threads, heat treats and then centerless grinds the entire body of the stud. Rolling the threads creates the toughest and strongest thread possible and centerless grinding removes notch sensitivity.  Further, the case end thread is designed to have a slight interference fit to minimize distortion and maintain good thread contact during torque procedure. The final process for all KPMI® Studs is to encase the entire stud with premium corrosion resistant treatment of Black Oxide. Congratulations on your choice to purchase a stud that meets and exceeds your stock-replacement of high-performance needs!

​​​

To learn more about this cylinder studs and other valvetrain related components,  go to 
Harley-Davidson® Milwaukee-Eight 2017-2018

Cylinder Head Service Kit, 0.380" Lift, Yamaha®, YZ™ 450F, 2006-'09 / WR™450, 2007-'15 / YFZ™450R, 2009-'16

High Chrome Seats

•  18-22% Chromium for resistance to abrasion, corrosion, and deformation
•  1-2% Nickel content, which lends to corrosion-resistance and toughness
•  Machined from solid bar stock and ground to exacting tolerances
•  The alternative to Powder Metal
•  Machines as a continuous chip
•  Use KPMI® “High Chromium Seats” for your next gasoline or diesel engine rebuild


 To learn more about these Kibblewhite® high chrome seats and other valvetrain related components,  go to 

Tools and Components Section.

Cylinder Head Service Kit, 0.435" Lift, Polaris®, RZR™ XP1000, 2015-2019

High Performance Spring Only Kit and Black Diamond™ Valves for Honda® CB™ 750 SOHC F2/3 1977-1978

•  High performance spring only solution compatible with the OEM retainer and base
•  Increased spring force and rates compared to the OEM springs designed for hi-lift cams and high RPM conditions
•  Premium grade, super clean ground chrome silicon wire X-Rayed at regular intervals to check for inclusions, heat

   treated, and shot peened, insuring maximum spring life.


•  ​Material and workmanship for desired advantages
•  One piece forged EV8-SS offers uninterrupted grain flow for head stability
•  Tufftride® coated for a high durability, low friction impregnated surface finish
•  “Super-Finished” stem allows for Formula 1 level coating consistency
•  Highly controlled production tolerances for outstanding consistency
•  Every surface is either CNC machined or ground as top quality valves should be
•  Swirl polished or CNC machined profiles are Flow Bench tested for optimized air flow
•  Street, Strip or Track. You are choosing extreme durability and performance


​To learn more about these Kibblewhite®  Spring Only Kits and Valves,  go to  Honda® CB750 SOHC F2/3 1977-1978

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Cylinder Head Service Kit, 0.350" Lift, Various Honda® Applications

Intake Only Kits for Honda® Various TRX™ 450's


•  Spring Kit is designed with increased spring rate and higher lift compatibility over the stock components
•  CNC turned retainers and Cr-Si dual springs provide valvetrain control at high RPM with high performance camshaft compatibility
•  Black Diamond™ Stainless Steel Conversion system significantly increases valve durability


Since 1938 KPMI® has taken great pride in our ability to design innovative Performance improvements , valvetrain. This innovative ability has never been more apparent than with the development of the high tech lightweight stainless steel conversion systems , the incredibly stressed and torturous environment in today's ultra high revving 4-stroke singles.
The challenge to engineer valvetrain that would out Perform OEM systems that in some cases included titanium components was not an easy one. This task would require the concentrated efforts of every member of KPMI®'s design team. It was apparent early on that a lightweight high flowing KPMI® stainless race valve was not going to be the complete answer , these engines. Working together as a team enabled KPMI® to evolve with a "unified system" approach. In fact, this innovative lightweight system would not only out Perform factory parts, but outlive them as well.
Today KPMI® proudly offers many complete valvetrain systems , a host of applications. Also, , applications with low hours and/or apparent In face recession and Ex components that meet factory specifications consider KPMI®'s Intake Only Systems when Performing necessary service. Bear in mind that KPMI® does not advise partial conversions on race bikes and/or engines that have reached factory advertised service limits. Always consult with qualified professionals suited to inspect your machine.

​​​

To learn more about these Kibblewhite®  Intake Only Kits and other valvetrain related components,  go to 

Honda® TRX™ 450R 2004-2005

Honda® TRX™ 450R / ER 2006-2014

Cylinder Head Service Kit

 2nd Round of Cylinder Head Service Kits  for Various Applications


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:

◊  Retainers
◊  Springs
◊  Basewashers as required
◊  Seals
◊  Guides
◊  Complete Set of Stainless Steel Valve (Std. Head Size)
◊  Complete Cometic™ Top End Gasket Kit


To learn more about these Kibblewhite® Cylinder Head Service Kits, or other valvetrain related components for the various models,  go to  
Honda® CRF™ 150R, 2007-2019

​Honda® CRF™ 250R, 2008-2009​

​Honda® CRF™ 450X 2005-2017​

Honda®  TRX™ 450R/ ER 2006-2014

Honda®  TRX™ 450R  2004-2005

Honda®  XR™ 650L 1993-2018

KTM® 400-560 RFS Eng. 2000-2009 89mm Bore

KTM® 400-560 RFS Eng. 2000-2009 95mm Bore

Polaris® Predator / Outlaw™  500  2003-2007

​Polaris® RZR™ 900 2013-2014

Polaris® RZR™ XP 1000 2014

Polaris® RZR™ XP 900 2011-2012

Polaris® RZR™ 900 2015-2016

Suzuki® LTR 450/Z™ 2006-2009

Suzukii® LT-Z / D-RZ™ 400 2000-2017

Suzukii® RM-Z™ 250 2004-2006

Suzukii® RM-Z™ 250 2007-2009

Yamaha®, Various 600's 2001-2008

Yamaha® WR/YZ™ 250F 2001-2013

Yamaha® WR/YZ™ 250F / FX 2014-2018


Cylinder Head Service Kit, 0.445" Lift, Yamaha®, YXZ™ 1000R, 2016-2019
Cylinder Head Service Kit
Cylinder Head Service Kit, 0.480" Lift, Yamaha®, Various 700's, 2006-2019
Cylinder Head Service Kit, 0.350" Lift, Various Honda® Applications

Performance Rebuild Beehive Spring Only Kit and Components for Suzuki® GSX-R1000 2009-2016

These high quality replacement springs have been designed to exceeds the OEM specifications by fitting precisely on the spring shoulder diameter of both the OEM retainers, and KPMI® H.T. Steel retainers (P/N 60-61701).
This kit also includes H.T. Steel basewashers in order to achieve a precision fitment on the large end of our beehive spring which, better controls the lateral motion of the spring, ensuring longer life and less wear on the valvetrain components.
KPMI® has gone a step further and specified the latest in spring materials and processing, an extremely robust design that will last longer than anything currently on the market
Unique features of this spring include is beehive variable rate wind to reduce the chances of spring surge due to cam harmonics, Super-Clean Chrome Silicon wire with additional Vanadium and Nickel added, increased strenth, and a gas nitrided and double shot peened finish, greater fatigue life Each basewasher has been engineered to maximize its mechanical strength using FEA design software.


By utilizing FEA software, it was possible to take advantage of the increased strength and wear resistance of a heat treated steel retainer, while reducing its mass to within grams of a comparable titanium retainer. These retainers are intended as an OEM replacement and are completely compatible with the OEM springs, keepers, and shims. The spring shoulder diameter has been designed to match the OEM retainer and spring as well as KPMI's beehive spring (P/N 60-61700), making this retainer your high performance OEM alternative.


Since 1938, KPMI® has taken great pride in our ability to design innovative performance improvements for valvetrains. This innovative ability has never been more apparent than with the development of the high tech lightweight racing valve spring kits for the incredibly stressed and torturous environment in today’s high revving 4-stroke engines. The challenge to engineer a valvetrain that would outperform OEM systems, that in some cases included titanium components, was not an easy one. This task would require the concentrated efforts of every member of KPMI®’s design team. It was apparent early on that an OEM style spring with a bit more pressure was not going to be the complete answer for these engines. Working together as a team enabled KPMI® to evolve with a “unified system” approach. In fact, these innovative high performance lightweight valve spring kits, would not only outperform factory parts, but outlive them as well. Each KPMI® spring kit is designed for its specific application, taking into account several critical parameters including; cam profiles, harmonics, natural frequency of the springs, valvetrain mass, required pressure, wire stress, fatigue life, and engine rpm, just to name a few! Today KPMI® proudly offers complete high performance lightweight valve spring kits for a host of applications.

We choose to use the copper based C63000 nickel-aluminum bronze as a material to make our bronze valve guides because of its ideal characteristics for the application. The 5% nickel content provides superior resistance to wear, and the approximately 80 percent copper content delivers outstanding heat conductivity. KPMI® guide profiles are designed to have minimal effect on the airstream while maintaining critical cross sectional thickness in high temperature areas, which promotes high performance and endurance.

​​All KPMI® Black Diamond™ Stainless steel valves are impregnated by a special German process to a depth of .002, with a surface build up of .0002. This Black Diamond process improves wear properties, reduces friction, and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis plating. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench. Black Diamond Valves are lightweight, strong, one piece forgings with profiles that provide excellent flow characteristics.
 ​​
To learn more about these Kibblewhite®  Spring Kits and other valvetrain related components,  go to 
Suzuki ® GSX-R 1000 20009-2016

 1st Round of Cylinder Head Service Kits  for Various Applications


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:

◊  Retainers
◊  Springs
◊  Basewashers as required
◊  Seals
◊  Guides
◊  Complete Set of Stainless Steel Valve (Std. Head Size)
◊  Complete Cometic™ Top End Gasket Kit


To learn more about these Kibblewhite® Cylinder Head Service Kits, or other valvetrain related components for the various models,  go to  
Can-Am® Maverick 2013-2018

Honda® CRF 250R 2004-2007/ CRF 250X 2004-2015

Honda® CRF™ 250R, 2010-2015

Honda® CRF™ 250R, 2016-2017​

Honda® CRF™ 450R / RX / WE 2017-2019

Honda® CRF™ 450R 2002-2006

Honda® CRF™ 450R 2007-2008

Honda® TRX™ 450R / ER 2006-2014

Kawasaki® KX250F™ 2004-2006

Kawasaki® KX250F™ 2007-2008

Kawasaki® KX250F™ 2009-2016

Kawasaki® KX450F™ 2009-2015

Kawasaki® KX450F™ 2016

​Polaris® RZR™ XP Turbo 2016-2019

​Polaris® RZR™ XP1000 2015-2019

Suzuki® RM-Z250™ 2010-2017

Suzukii® RM-Z450F™ 2008-2018

Yamaha® YZ™ 450F 2003-'05 / WR™450 2003-'06

Yamaha® YZ™ 450F 2006-'09 / WR™450 2007-'15

Yamaha® YFZ™450R, 2009-'16

Yamaha® YZ™ 450F 2014-'17 / 450FX 2016-'18​

Yamaha®, Various 700's, 2006-2019

Yamaha®, YXZ™ 1000R, 2016-2019