SOHC.co.uk Forums > SOHC Singles & Twins
High revs won’t drop back down
DomP:
I agree with air leak at the inlet manifold, I was in denial for a while because I'd fitted new orings, turned out they were undersized cross section, correct size fitted solved what had been a long term issue.
Craizeehair:
Thanks for the suggestions, looks like I need to find some time to get the basics checked and go from there. I don’t think it’s the intake rubbers as I replaced them already as the others did look pretty ropey.
Rozabikes Tim:
Various utube videos I have watched used a spay of brake cleaner at tick over on the rubber manifolds. If that changes revs, there is a leak!
Never tried it myself but makes sense....
DomP:
Yes I'd changed mine too which is why I continually overlooked them as the problem. My new orings are significantly thicker
Craizeehair:
I’ll try spraying around them and see what happens, I’m pretty sure it only happens once it’s warmed up?
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