Have a Sept 03 GSA T/Spark with Y & Remus, no cat code plug fitted,otherwise standard. Has never had any of the power or surging problems from new. Bike done 17000+ miles. Got back from a trip to France parked in the garage. Next day running like a bag of sh..t, and like riding with oval wheels. Got in to dealers and replaced the TPS and both plug coils (ones in head) + reset all the cables, balance etc. 90% better but still has the surging at steady throttle in the 2/3000 rev range. Done the search done the tests, valve clearences, plugs etc. Waiting to get back in to dealers for another go at it. If you read this Steptoe whats the cure? Suspect the Oxy sensor may be! Dose the mod with the wire bridge work on Tsparks. Much peed of as used to be as smooth as any boxer can be, now a pain to ride in traffic and filtering a nightmare. Any suggestions helpfull and otherwise (yes I know this forum) would be most appreciated.
