04-27-2020, 01:29 AM
(04-25-2020, 01:08 AM)Dave_imp Wrote: what i have never been able to work out is how much the difference between the piston and the cyl housing actually is, maybe Dave has an idea, i never asked him back then.Hi Max. When I inspected my IACV upon removal the piston moved freely within the cylinder housing. If you remember, I even checked the movement of the old IACV versus the new IACV, and I didn't see any difference (checked by plugging it in to the bike normally and turning the ignition key off and on - while watching the piston movement with the IACV removed from the engine). My advice is just replace the IACV. By the way - replacing the IACV completely, 100% cured my idle instability issue, and it has never returned.
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Dave, were there any scratches/scoring on the IACV piston, suggesting previous interference from grit or any foreign substance?