Posts: 403
Joined: 10/2/2016
Location: Decatur, AL USA
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
Posts: 601
Joined: 12/24/2011
Location: Benton, LA USA
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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Location: PA, USA
Titanium all the way for me. Stainless, especially in a 250f, make the bike feel quite lazy up top.
Tomac and/or Anderson for 2020.....
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Location: Decatur, AL USA
Posts: 601
Joined: 12/24/2011
Location: Benton, LA USA
If you want the Titanium valves to last longer, have CB valve seats installed into the head.
Paw Paw
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Location: Huntersville, NC USA
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Location: Warren, OH USA
Paw Paw wrote:
If you want the Titanium valves to last longer, have CB valve seats installed into the head.
Paw Paw
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Posts: 463
Joined: 11/8/2015
Location: Huntersville, NC USA
Posts: 463
Joined: 11/8/2015
Location: Huntersville, NC USA
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Joined: 12/24/2011
Location: Benton, LA USA
Posts: 463
Joined: 11/8/2015
Location: Huntersville, NC USA
Good power, builder series hot cam. Heavy duty springs, upgraded DLC buckets, vortex ecu, ported tb, moto Tass
IG @jaredkeller96
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Joined: 3/28/2016
Location: CAN
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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Joined: 3/28/2015
Location: Perris, CA USA
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?
Retired Mechanical Engineer, published technical writer, mscperformance.com, Bisimotoengineering.com,
Posts: 463
Joined: 11/8/2015
Location: Huntersville, NC USA
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.
IG @jaredkeller96
