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Hi Guys,

I've just been running my project bike... when it rev the bike up on the spot sometimes the revs dont drop back to idle straight away, theres a few seconds delay or even longer sometimes. It stays around 3Krpm when it does it. Any ideas what this could be?

The other thing is at idle, if you snap the throttle open as quick as you can the bike dies... if you hold it at 3/4Krpm and snap the throttle open its almost fine.

Could both problems be an airleak somewhere? Or does it sound more like a fuelling issue? I've read the inlet rubbers are a usual issue?

Your first problem sounds like leaking inlet rubbers. U can get new o rings to fix it or use hermatite to seal them your second problem is probably caused by the first one so id say fix that first n see how it goes