J ray
XS650 Enthusiast
81 xs650. Started it up this week after changing oil and filters, rotor brushes, new fully charged battery, new gas, clean tank, clean carbs (38's). It started after just a few kicks but was idling rough. I thought maybe the air was too restricted, having 81 air filters on the bigger carbs, so I backed out the mix screws 1 turn. This seemed to solve the problem so I test drove it and it ran real good for about a mile or two up and down highway suddenely it seemed like someone cut the gas off then the engine revved down to an idle. I was able to run the bike back home in 1st gear at idle.
I can get it started with a kick or two but it just idles rough. It dies or pops and sputters when I try to bring up the revs.
I've checked the timing, pick up coil, valve clearance, intake for leaks, cleaned connections, tested the ign coil, air filters are good. I haven't tested compression but I get alot of resistance on the kicker and no noticable increase in the kick resistance after adding a little 50w to the cylinders.
I did find that that the right cylinder plug is dry and sooty (before oiling cyl) and the rev won't change after shooting starter fluid down the throttle barrel on the right side but that the left side plug is tan and that the rev slows after starter fluid is used on the left carb.
Cyl 2 runs cooler than cyl 1.
Does any one know just wtf is going on here?
I can get it started with a kick or two but it just idles rough. It dies or pops and sputters when I try to bring up the revs.
I've checked the timing, pick up coil, valve clearance, intake for leaks, cleaned connections, tested the ign coil, air filters are good. I haven't tested compression but I get alot of resistance on the kicker and no noticable increase in the kick resistance after adding a little 50w to the cylinders.
I did find that that the right cylinder plug is dry and sooty (before oiling cyl) and the rev won't change after shooting starter fluid down the throttle barrel on the right side but that the left side plug is tan and that the rev slows after starter fluid is used on the left carb.
Cyl 2 runs cooler than cyl 1.
Does any one know just wtf is going on here?