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May 24th, 2009, 12:30 PM   #1
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Ti valves

whato all, some folk know that i have had some Ti valves coming in and wanted to know the weight of them.

anyway, i have just machined up two 37mm inlets for a greek customer. the OEMs weigh 42gms while these weigh 28gms each.

i know that Ti is meant to weigh 56% of steel so 23gms would have been good but we machined the backs down when trimming and on reflection i think we should have taken everything off the front face. Ti valves don't have a dish in the front either so next time.....

regards

Taffy
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May 24th, 2009, 10:30 PM   #2
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RE: Ti valves

Hi Taffy, whats the price please for a set (& presume they will be compatible with the dual springs I've just ordered?)?

I've bent the inlet valve on the piston head, so need to renew anyway...

Thanks

Crispin
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May 25th, 2009, 01:51 AM   #3
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RE: Ti valves

Ti valves can only be used with soft seats such as phospher bronze etc. so that's out of the question here. i will be producing 37s in a steel alloy very soon but unfortunately funds have hit a blip this last 10 days. they will be £45 each. i expect to have them ready in 30-40 days.

so you are left with the OEM steel valves which are £66 each. i have some cleaned up (ex)tuliped valves that are 36.9mm and fine at £35 each.

regards

Taffy
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May 25th, 2009, 06:52 AM   #4
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RE: Ti valves

you'll have to excuse my ignorance here, but is it a big job (or possible), to replace the seats? The engine is fully stripped at the mo, so if I was ever going to up-grade the valve material/seats etc, now is a good time to do it.

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Crispin
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May 25th, 2009, 07:39 AM   #5
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RE: Ti valves

i can't emphasis enough that there is no point in going t Ti. the standard valves and springs can go through the redline on a 450 so you are in no danger using the standard valves and DVSK on a 650. the only reason for Ti is to rev them to the stratosphere, to place where if you took the bike to you would throw a rod on day 1.

i haven't changed seats for years. to a good tuner they are a piece of piss.

the greek has paid £100 per valve for them and next time i could be a bit cheaper but i eered on the side of caution this time.

my 37mm valves will be £45 each soon. a month or. £21 cheaper, flow better, weigh less and won't tulip at all.

regards

Taffy
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May 27th, 2009, 10:26 AM   #6
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RE: Ti valves

Hey just wanted to say thanks Taffy for the DVSK!! Arrived very promptly, items in perfect condition, & 3 sides of A4, full of information & details on how to install the springs including, diagrams, photographs, their benefits, power savings etc etc, the list goes on....

I don't often have cause for praise in this day & age, but I do today, so a sincere thanks!!!

I'll let you know how I get on with the rebuild & the effect these springs have.

Crispin
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