August 10, 20251 yr Hi just picked up a 1978 tr77 starts lovely and idles nicely BUT after a few minutes it will pick up the revs to almost maximum without any input without sounding dense where do i start?
August 10, 20251 yr Uncontrolled acceleration can be caused from intake vacuum leak. ... that is where you have a very small air leak type hole somewhere between the carb and cranckcase. Edited August 10, 20251 yr by lemur
August 10, 20251 yr What happens if you give the throttle a big blip when it starts revving up? Could also be starved of fuel if there is not an air leak as Lemur has suggested.
August 16, 20251 yr Author Ok just an update.. the carburettor slide was gummed up And by the paperwork supplied by the previous owner they had paid a reputable bike garage to strip And clean the carburettor And service the bike seems the garage took the money And didn't do anything 🤦♂️
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