Kibblewhite Top End Service Kit

The pistons, rings, valve and pin clips in this kit are designed to work together as a system. These are NOT compatible with OEM components and should ONLY be used with components in the kit.

Give your bike a performance boost
Includes all necessary parts for a complete top end service/rebuild: pistons, piston rings, piston pins, gaskets, valves and valve springs
Pistons fully machined from 2618 aluminum alloy with a performance skirt coating
Black Diamond or White Diamond engine valves (depending on application)
Lightweight racing valve springs kit with titanium valve spring retainers, dual springs and H.T. steel base washers (springs are suitable for use with high-performance cams)
All necessary gaskets, seals and O-rings included
Sold as a complete kit
Made in the USA

Specification	Details
Bore	Varies (make selection above)
Country of Origin	USA
Material	Varies (make selection above)
Valve Lift	Varies (make selection above)
Valve Type	Varies (make selection above)

Vehicle Fitment

Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.

CRF250R 4-Stroke 2004-2007
CRF250X 4-Stroke 2004-2009, 2012-2017
CRF450R 2002-2008
CRF450X 2005-2009, 2012-2017
TRX450ER Sportrax 450ER 2006-2014
TRX450R Sportrax 450R 2004-2014

General 1000 2016-2020
RZR 900 2015-2020
RZR RS1 2018-2022
RZR S 1000 2016-2020
RZR XP 1000 2014-2021

DR-Z400 2000-2004
DR-Z400E 2000-2007
DR-Z400S 2000-2024
DR-Z400SM 2005-2009, 2012-2021, 2023-2024
LT-R450 QuadRacer 450 2006-2009
LT-Z400 QuadSport 400 2003-2014

WR250F 2015-2018
WR450F 2003-2015
YFZ450 ATV 2004-2009
YFZ450R ATV 2009-2023
YZ250F 4-Stroke 2014-2018
YZ250FX 4-Stroke 2015-2018
YZ450F 2003-2009

Customer Reviews

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Got the kit and installed. Instructions were explanatory. Bike rips now. Thank you

Bought my CRF450R new in 07' she was a ripper for many years but when she started getting hard to start I started looking into top-end kits... Well she is a fresh ripper, be careful not to loop it! Was such a slow fade I couldn't tell I was down on power with the fresh top end I've got all the power! Only thing I can say is that it is a bummer that this kit does not come with valve keepers. Overall great quality went together well and the bike rips, my local shop quoted me $1200 I got it done over a weekend and saved $800. Great Kit!

Great value for great price! Best top end kit i have purchased, performance is like brand new!

Kit included all top end parts, and the bike is running great. Would definitely recommend.

Nice kit

Great parts. Quality.

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Questions & Answers

Ask Question

What brand piston comes with it

By Ethan

According to Kibblewhite, the pistons that come in these kits are made by JE.

By Andy

Answer Question

Will this fit a x model "crf450x 2005"?

By William

Dont know if there is any differance i thought x modle runs a differnt cam so these should work?

Yes, there is an option to choose that 2005 CRF450X model to get the correct kit.

By Andy

Answer Question

do i need to buy valve keepers with this kit, or can i reuse my old ones?

By Anon.

So long as the keepers you removed are in good condition, you should have no problem reusing them.

By Andy

Answer Question

Does it come with retainer keys? I don't see any in the picture or parts list.

By Anon.

These kits do not include the retainer keys. You would need to reuse the originals or purchase new separately.

By Andy

Answer Question

Does it come with shims

By TreVaughn

Shims are not included with the top end service kit.

By Andy

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Kibblewhite Top End Service Kit

Select Your Vehicle - Fitment Guaranteed