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2002 GSX-R 600 with 33k miles, PCIII, and never checked valves.
the map was done years ago at RJ's in NH.
this morning i'm getting a bad front vibration at 10k+ RPM in 4th, and 8.5k+ in 5th and 6th.
possibilities:
- map went bad (but unlikely)
- injectors clogged
- front wheel balance
- dirty air box
- dirty spark plugs
- valve clearance?
i could run an injector cleaner in my next fill up. if that doesnt help, then i could take off the upper & lower injectors to a cleaning service.
if the front tire wasnt balanced properly, wouldnt that vibration happen at all RPM ranges or speeds?
would a bad valve gap cause a vibration at a high RPM?
any other ideas/possibilities this might be?