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Pro Circuit Valves

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I got 15 hours on my PC valves ! Bikes getting a little harder to start.

How long are these valves supposed to last ?

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I've got 140 hours on my PC head and have never shimmed.

Check them. They should be @ .004 in and .006 ex.

(recommended by PC)

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wow! thanks, Have u had to change the valve springs ?

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I have kibblewhite valves and prc circuit springs, and after some hours on it, one of the valve springs snapped right in half without any warning. kinda bummed, i was really dissapointed, i don't think i coule break a valve spring in half with a hammer if i tried.

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probably because you ran a steel valve with a spring made for a titanium vavle

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there is plenty of peopleon this website that run this combination, i'm pretty sure im not the only one.

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ahh maybe i'm wrong ....i've been running PC springs with stock valves with great results ...maybe it was just a fluke with yours

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You bring up a good point. The SS valves are heavier and need the

appropriate springs. RHC can help you out w/ the right valves and the

correct springs.

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