NOT A NEW TOPIC FROM THE SOUNDS OF IT BUT HAVEN'T SEEN ANY DIFINITIVE ANSWER
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MY 88 WAS RUNNING A LITTLE CRAPPY (CARBS) AND I HAD MY MECHANIC CLEAN THEM.BIKE RAN GREAT.ALL OF A SUDDEN IT 2 WEEKS LATER STARTED SOUNDING LIKE A 2 STROKE AT STEADY THROTTLE AND WOULDN'T IDLE.I HAD ALREAD PULLED THE TANK CHECKED THE PETCOCK FOR CLEANLINESS AND OPERATION AND THE TANK AND GAS WERE SPOTLESS.DRAINED CARBS AND GAS WAS FINE NO CRUD OR GUNK.MECHNIC LOOKED AT IT SUNDAY AND REPLACED THE VACUUM LINE TO PETCOCK.BIKE SOUNDED FINE IDLED AND REVVED NO PROBLEM.3 BLOCKS DOWN THE ROAD EXACTLY SAME PROBLEM.PULLS STRONG AT HIGHER REVS AND BOTH PIPE ARE HOT.i HAD A SIMILAR PROBLEM WITH 700SC NIGHTHAWK AND IT WAS THE PLUG WIRES.AS IT'S INTERMITTENT I HAVE TO FIGURE ELECTRICAL NOT CARB WHAT ARE YOU GUYS DOING FOR NEW WIRES?
SEEMS TO BE AN ONGOING PROBLEM FOR A LOT OF US.
there aint no definitive answer, you have to trouble shoot it, if its not gas then its electrical (maybe), could be plug wires, could be plugs, could be coil, you are looking to fix 20 years of problems adding up, I say call it a day and get a newer bike dude, there comes a time in every bikes life when it needs to go
No need for a new bike dude!~ Looks brand new has 3900 miles on it and until this ran awsome!Found tyhe petcock diaphram shot so hoping thatmay be the problem
