Kibblewhite Intake Valve

$31.99 - $57.99
4.70 out of 5 stars
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Kibblewhite Intake Valve
Kibblewhite Intake Valve
  • Description
  • Reviews (19)
  • Q&A (12)
  • Fitment

Kibblewhite intake valves are a great upgrade from your O.E.M. motorcycle valves due to their superior performance and outstanding reliability.

All KPMI Black Diamond™ stainless steel valves are impregnated by a special German process to a depth of 0.002", with a surface build up of 0.0002". 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 Kibblewhite's computerized flow bench. Black Diamond™ Valves are light, strong, one-piece forgings with profiles that provide excellent flow characteristics and will outlast titanium valves.

4.7 out of 5 stars (19)
4.7 out of 5 stars
5 star   15
4 star   2
3 star   1
2 star   1
1 star 0
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1-10 of 19
Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
stew

Great parts

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Top 500 Contributor Top 1000 Contributor Verified Purchaser MotoSport Staff
Location: wilsonville
matt74

got these for a 07 crf450. had been using another brand of SS valve. These are very nice. easy install once you get the head off with the correct tools. From other reviews I have high hopes of putting some hours on these without issue

Overall 2 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: Arkansas, USA
WoodsRider544
Won't last

Bought these along with suggested spring kit in April of 2013 only rode 27hrs and now its time to replace already. I don't ride hard and only ride in the woods so I am not bouncing off rev limit or anything. Just poor quality valve.

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Location: Tampa Bay, Florida, USA
TRXlover
Awesome valves!!

Best valves you can buy! Fit is great and quality that is second to none.

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: Kennewick, WA, USA
geez
Kibble White Intake Valves

Replaced my last set of KW with new again. These along with seat regrind and new seals have returned my 2002 crf450 to awesome performance. After about 135hrs on the last set they needed it but I will keep doing this until the head reaches its limits in life. Love the KW intake and exhaust along with 13:1 compression.

Overall 4 out of 5 stars
Durability
Ease of Installation
Performance
Power
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Verified Purchaser
Location: wellsburg,ny
jeremy
Great purchase

Needed new valves and springs for for my engine with putting a 440 big bore kit on kfx 400 have it in the shop right now getting all the engine work done so it is ready for the races hope she runs good with these valves that are said to be better than the titanium ones thank you motorsport team

Overall 5 out of 5 stars
Top 1000 Contributor
Location: westliberty,ky
cummins450
Intake valve

this is a great product i recomind it to all

Overall 5 out of 5 stars
Location: Lakeland, FL
SuperBudgetRider
BEST VALVES THERE ARE

These valves are AMAZING!!! 1. SUPER DURABLE: After one break-in ride, I haven't had to adjust my clearances once yet. 2. THE POWER!!!: The power increase from replacing my old stock valves with Kibblewhites was CRAZY. It felt like I was riding a brand new bike!!! My bike was so much more powerful that I actually cased a few jumps before I had gotten used to it. GO WITH KIBBLEWHITE!

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Top 1000 Contributor
Location: south jersey
douge
Don't buy the expensive junk!

These valves are built to exact spec. They fit great and after i broke them in i haven't had to adjust. Don't use without the spring kit, they are heavier than stock so you need the sual springs or you could have a broken spring.

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Top 1000 Contributor
Location: Grundy VA
Pab338
BEST EVEER

BEST intake valve ever bought i bought mxfaction valves and they went out in 1 week these are the best i highly reccommend this product

1-10 of 19
Total Questions (12)
Questions with answers:
  12
Questions without answers:
0
xXR1ITUPXx Location: Denton,TX
1-10 of 12
motoman21 Over 8 months ago
Can i run these on my stock valve seats? both intake and exhaust?
I've got a 2004 yz450f that I plan on doing cams and a 13.5:1 piston. While it's all torn down I wanna replace the valves. Can I run these with the stock seats or do I have to have New seats installed? Thanks.
MotoSport Staff Expert
Over 8 months ago
MotoSportExpert
Yes you can run the OEM seat but I do recommend going with the Kibblewhite Valve Spring Kit. http://www.motosport.com/2004-yamaha-yz450f--kibblewhite-valve-spring-kit
Johnny21 2 years 6 months ago Location: Ca
With the coating do I still lap in these valves?
MotoSport Staff
2 years 6 months ago Location: Portland, OR, USA
MotosportStaff
It is not always necessary to lap these valves, but if it appears that it needs it- you are safe to do so. We contacted Kibblewhite directly to verify this information for you.
xXR1ITUPXx Over 5 years ago Location: Denton,TX
Stock valve springs?
I have stock valve springs and want to run these kibblewhite valves on my 2008 crf250r. Would it be ok if I ran these with my stock springs? And are oem stock springs titanium or stainless steel? I am a beginner also
MotoSport Staff
Over 5 years ago Location: P+RTLAND
Drewski
Your OEM springs are stainless. You will need to buy Kibblewhite springs, do not reuse your stock ones.
Top 1000 Contributor
Over 5 years ago Location: south jersey
douge
i would reccomend using the kibblewhite kit but you need spring stronger than stock because they are heavier than stock. typically any dual spring would work.
xXR1ITUPXx Over 5 years ago Location: Denton,TX
07 & 08?
I have some 07 of these valves. Would I be able to put them in my 08 crf250r? I dont think that they changed from those years but I wanted to make sure. because I need to save money. Thanks
MotoSport Staff Expert
Over 5 years ago Location: Motosport
Mike24
The 2007 and 2008 CRF250R Intake valves are different.
xXR1ITUPXx Over 5 years ago
Just the valves?
If I were to only get new intake and exhaust valves and not the springs too, would I be able to run them with the stock springs on my 08crf250r? I dont have the money right now to get the springs too, and my springs are still fine. Thanks.
MotoSport Staff Expert
Over 5 years ago
dirt
if you are running kibblewhite valves then you need to run the kibblewhite springs. otherwise engine damage could occur.
Top 1000 Contributor
Over 5 years ago Location: south jersey
douge
i wouldn't do it.... you could end up spending a lot more money in the long run if you use stock springs. they might last a little while but they aren't strong enough to handle the increased weight of these valves and could break.
Vergados Over 5 years ago
I don't have to machine drill the head for these vavles right?
MotoSport Staff Expert
Over 5 years ago Location: Portland
MotoMoo2
No, these are stock dimensions. You might have to use the Kibblewhite valve spring kit though.
Top 1000 Contributor
Over 5 years ago Location: south jersey
douge
i would replace the valve guides, and seals. all you need is to do if your contact area on the head is swithing spec and in good shape is grind them in and you're good to go.
cabotapia Over 5 years ago Location: san diego
What valve can i use ?
i want install to my honda trx450 a high compression piston 23.1:1 std and hot cam stage 2. what valve i need? std or oversize? thanks
Expert MotoSport Staff
Over 5 years ago Location: USA
james718
I would suggest the standard valves, unless if you plan to port the head and rebuild the bottom end (or stroker kit). Keep in mind the oversized valves will require the head to be milled to accommodate the larger diameter valves.
Top 1000 Contributor
Over 5 years ago Location: south jersey
douge
If the guides in your cylinder head is still stock than you need std.
jpie33 Over 6 years ago
How much bigger are they?
MotoSport Staff Expert
Over 6 years ago Location: Portland, OR
james718
This link will take you to Kibblewhites website for specs on thier valves: http://www.blackdiamondvalves.com/pdfs/KPMI_Catalog_2008.pdf
CRFonly Over 6 years ago
What is it about the steel valves that requires the spring kit?
Why can't the stock springs be used?
Over 6 years ago Location: New Hampshire
ColtFortyFive
The spring kit is a must have. Stainless Steel valves require heavy duty springs. The OEM springs cannot compensate for the added weight of K.W. SS valve.
Top 1000 Contributor
Over 5 years ago Location: south jersey
douge
they're heavier
Jerold Over 6 years ago
How many do u get?
MotoSport Staff Expert
Over 6 years ago
james718
These are sold individually (1).
MotoSport Staff
1 year 2 months ago Location: wilsonville
matt74
they are sold individually
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