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Kibblewhite Stainless Steel Intake Valve Kit

Retail: $216.99
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Kibblewhite Stainless Steel Intake Valve Kit

Product Description

Since 1938, Kibblewhite has taken great pride in their ability to design innovative performance improvements for the valvetrain. This innovative ability has never been more apparent than with the development of the high-tech lightweight stainless steel conversion systems for the incredibly stressed and torturous environment in today's ultra high revving 4-stroke singles.

The challenge to engineer valvetrain that would outperform O.E.M. systems that in some cases included titanium components was not an easy one. This task would require the concentrated efforts of every member of Kibblewhite's design team. It was apparent early on that a lightweight high flowing Kibblewhite stainless race valve was not going to be the complete answer for these engines. Working together as a team enabled Kibblewhite 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.

Detailed Specifications:

  • Type: Valve spring kit, intake only.
  • Description: 50# seated pressure / 144# at 0.350" valve lift / max lift 0.350".
  • Valves: Valve, intake, Black Diamond™ (Part #30-30630).
  • Retainers: Retainers, intake, titanium (Part #30-31201).
  • Keepers: Use O.E.M.
  • Springs: Valve springs, intake, Kobe Super Clean chrome silicon wire (Part #30-31203).
  • Basewashers: Basewashers, intake, heat-treated steel (Part #30-31205).
  • Seals: Seals, intake, red Viton (Part #30-31209).

Notes: For applications with low hours and / or apparent intake face recession and exhaust components that meet factory specifications, consider Kibblewhite's Intake Only Systems when performing necessary service. Bear in mind that Kibblewhite 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.

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4.6 out of 5 stars
5 star   12
4 star   1
3 star 0
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1 star   1
Wrinkles Location: Charlotte, NC, USA
1-10 of 14
Verified Purchaser
Location: Tuscaloosa, AL
Complete Kit

Great kit, installed into a crf250x with no issues hopefully will last for a long time. Very complete kit packaged well and each item was individually bagged.

Verified Purchaser
Location: Chamois, MO 65024, USA
Good valves!

These valves were perfect in my 2010 kx250f, they seated good and the springs and every other aspect of the valve kit went in my motor great! definitely recommend these valves and motosport for any engine parts!

Verified Purchaser
Location: Charlotte, NC, USA
Install and forget

Once you install these. Forget them cause they will continue to perform.

Location: Vista, CA

Fantastic product! Quality looked amazing out of the box and brought them along with my head to local shop to have seats cut and kit installed. Hour later I was home bolting everything back into specs and my bike roared back into life. Incredibly pleased with the product and my bike feels incredible with this intake kit installed. Cant wait to get back where I belong!

Ocotillo Wells

I installed these in my 2011 KX250F serious power loss and awful starting when hot I changed to these valves because the oe valves were not lasting long at all. After using these I switched back to oe valves. They are lappable into the head and easy to install but if your gonna race the bike do not use them!!

Location: Durango, CO
A Great Product

I installed these in my 2003 CRF 450 when the stockers began tto stretch. They have been worry free ever since. I would buy them again

Location: Graham, WA
Great Valves

Easy to swap from OEM and work really well

Kibblewhite Stainless Steel Intake Valve Kit
Location: Kalispell, MT
Great Product

I installed these on my 07 CRF250R after fighting with the factory valves. I installed these along with stainless exhaust valves and have yet to adjust them after several hard rides, and a weekend at the dunes.

Location: Temperance, MI
Outlasts any other brand

These valves are great. When first installed they have around a 5 hr break in period. After the valves settle and seat they are by far the best valves i have ever installed. I installed them in my 05 CRF 450 that has many motor mods because i kept stretching titanium valves. There is no power difference what so ever and with 20 hours on the new valves they have not stretched even .001 inch. GREAT PRODUCT

Location: Puelo West, Co
Valve job? Murphys law do it all

supurb machining,both springs & valves weighed excactly the same to the .ooo. If you dont or cant cut new ceats on your head this will cost you about another $75-100 at your dealer. Kit does not come with new cotters (retaining pins) but the old ones were just fine. Let me take the time to maybe save you more head aches. if you are also switching out to a new piston, basically the top end do yourself a favor and also do the bottom end as well. in a matter of time that new fresh top end will blow out that bottom rod bearing. These motors turn some high RPMs. I reused the cam & cam bearings, retainer clips, intake caps& timing chain. Have over 15hrs of some hard riding, no wear on the valvaes yet. RUNS GREAT!!!!

CRF250R 2007
1-10 of 14
Total Questions (1)
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nickname Location: China Township, MI, USA
1-1 of 1
nickname Over 10 months ago Location: China Township, MI, USA
Valves on 04 crf 250 R?
why are the base washers thicker then the OEM base washers and why are the springs doubled up unlike the OEM just wondering if i have the wright ones also do i need to lap the valves intake are new and the hesd is new and the springs are new but the exaust valves are the old OEM just wondering if lapping is required on the old valves and new valves or just the old or none. thanks
MotoSport Staff
Over 10 months ago Location: Portland, OR, USA
The kit for your 2004 CRF250x is indeed supposed to run double springs. It is not uncommon for companies to use dual springs to better help control the valves under high RPM conditions so they do not float. The spring bases are manufactured to work with these springs. These springs have a different thickness wire and the bases will be the correct height to compensate for this to put correct preload on the spring. For the valves you will want to lap them to the new head. It would be recommended to check with an engine builder to verify the old exhaust valves are in a useable condition. Typically when you have a new head it is common practice to install new valves to ensure the longevity of the valve train and to prevent premature wear of the valve seats. You only want to lap steel valves into the head and would not lap a titanium valve.
1-1 of 1

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