I have a '99 stock engine, 12000 mi., Marving slip-ons, a/f screws turned out 2 3/4 turns. I keep the carbs sync'd with a carbtune.
Bike has been running very well with very occasional popping back thru carbs on right side on hot days during take off.
After sitting for 1 or 2 days, I started it and it wouldn't idle with choke set at it's usual warm up position. After warming it up with the throttle the idle was down to about 600 instead of it's usual 1000.
I put in 8 oz. of seafoam and dialed up the idle to 1200 or so. It went ok for 50 or 60 miles then began running on 3 cylinders, would clear up then 3 cyl again. Went about 15 miles today, it would load up, clear up, load up.......over and over.
Put new plugs in, gapped @ .033", the old plugs looked ok, medium tan but # 2 was wet and gassy smelling. It fired right up with new plugs and had a nice loping idle. Went for a ride and it was very crisp, pipes sounded great, strong accel. to7500 or so but after 6 or 8 miles it started loading back up and had that dead sound of running on less than 4 cyl.
It seems to respond well to WOT, but with no load on the engine it goes back to loading up again.
I think this is a carb issue but don't know where to begin. This happened overnight, one day it ran good, a day or two later it ran like crap.
Thanks in advance for any suggestions.
dan :bang head:
Bike has been running very well with very occasional popping back thru carbs on right side on hot days during take off.
After sitting for 1 or 2 days, I started it and it wouldn't idle with choke set at it's usual warm up position. After warming it up with the throttle the idle was down to about 600 instead of it's usual 1000.
I put in 8 oz. of seafoam and dialed up the idle to 1200 or so. It went ok for 50 or 60 miles then began running on 3 cylinders, would clear up then 3 cyl again. Went about 15 miles today, it would load up, clear up, load up.......over and over.
Put new plugs in, gapped @ .033", the old plugs looked ok, medium tan but # 2 was wet and gassy smelling. It fired right up with new plugs and had a nice loping idle. Went for a ride and it was very crisp, pipes sounded great, strong accel. to7500 or so but after 6 or 8 miles it started loading back up and had that dead sound of running on less than 4 cyl.
It seems to respond well to WOT, but with no load on the engine it goes back to loading up again.
I think this is a carb issue but don't know where to begin. This happened overnight, one day it ran good, a day or two later it ran like crap.
Thanks in advance for any suggestions.
dan :bang head: