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H2C Idle - over run?

Posted: Fri May 15, 2026 11:07 am
by Nigel Thorpe
Hi. Just got one of the H2C's going after some work - carbs etc. Starts fine and idles OK. If I push the revs up to 2500 or 3000, then let go, it takes 15 seconds or so for the revs to drop back down to the idle. Would anyone have an idea why please? Thanks. Nigel

Re: H2C Idle - over run?

Posted: Fri May 15, 2026 11:24 am
by Wolfie
Have the Carbs been balanced as per the manual? It may be that just one is pulling the others along.

On my own, I found that lowering the tickover just a little helped it drop quickly back down although there is still just a slight delay.