titanium valves or stainless steel valves for kx250f?

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8/17/2017 7:57 AM

Its top end time for my 2013 Kawi 250f. Just wondering what is yalls take on running titanium valves or steel? From what I have gathered, theres not much performance difference & that the steel will last longer? Also, how is kibblewhite brand? They have rather decent prices on their titanium valves & spring kit.
Thanks, Wayne

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8/17/2017 8:12 AM

Great brand...I have used them ( stainless) had had very good life, but I did notice a bit of a performance drop.

Paw Paw

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8/17/2017 8:26 AM

Titanium all the way for me. Stainless, especially in a 250f, make the bike feel quite lazy up top.

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Tomac and/or Anderson for 2020.....

8/17/2017 8:54 AM

With the price difference not much between the 2, I'm gonna go with titanium. Thanks guys!

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8/17/2017 1:08 PM

If you want the Titanium valves to last longer, have CB valve seats installed into the head.

Paw Paw

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8/17/2017 1:19 PM

Xceldyne Ti valves or del west if you got the money.

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IG @jaredkeller96

8/17/2017 6:36 PM

Paw Paw wrote:

If you want the Titanium valves to last longer, have CB valve seats installed into the head.

Paw Paw

Copper Boron =$$$$$$

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Many thanks to everyone helping me out this GNCC season: SRT Offroad, Acerbis, FCR Suspension, O'Neal Racing, Evans Waterless Coolants, Rekluse, Twin Air, Braking Brakes, Carbsport

Profile image credit Ken Hill Photography

8/17/2017 11:27 PM

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IG @jaredkeller96

8/17/2017 11:29 PM

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IG @jaredkeller96

8/18/2017 11:14 AM

Mow that is a pretty head and ready for action.

Paw Paw

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8/18/2017 11:18 AM

Good power, builder series hot cam. Heavy duty springs, upgraded DLC buckets, vortex ecu, ported tb, moto Tass

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IG @jaredkeller96

8/18/2017 12:01 PM

The only bike I've ever seen that can possibly benefit from stainless steel valves is an 06-09 CRF 250

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8/18/2017 3:37 PM

I'd stick with the stock part. The materials/coatings on both valve and seat are designed to work together. Mixing up such critical components is never a good idea unless the stock part has reliability issues. Many aftermarket valves, even very high end ones, are made using whatever front, blackface, backcut, stem and seat shapes their production line uses and isn't optimized to your particular engine like the stock part. Why risk it?

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Retired Mechanical Engineer, published technical writer, mscperformance.com, Bisimotoengineering.com,

8/18/2017 6:06 PM

Well when replacing valves you either need to replace your seats or have them recut so it really shouldn't matter about stock materials etc. he'd have the valve seats cut to the valves he's installing.

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IG @jaredkeller96