rattle under load
Been out today to try the 42 pilot jet.
The needle is standard on 2nd position and got 178 main jet.
off road ok but on the tarmac sections at around 35 - 40 mph it surges if you get into top gear and on an up hill when you open the throttle there's a noise like a small end rattle, don't think its detonation as plug color is good and no oil dripping from exhaust.
Any ideas
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