Hopefully someone here can help me with some bad running I'm experiencing.
Upon cold starting, the bike fires quickly and seems to run really well with the choke about halfway on. But slowing it down, or turning off the choke completely even after a couple of minutes yields a very slow, lumpy idle and the sound of a 'miss'...not on every stoke, but on every few. I'm getting a 'sputtering' from the exaust. Once the bike is fully warmed up from a long ride, it either idles at a normal level, or a little high, so adjusting the idle up isn't a good remedy for cold idle. I tried it...it only exacerbates the following problem:
While riding, whether hot or not warmed up yet, it likes to hold onto revs, which makes shifting awkward since the engine is still revving by the time you're ready to release the clutch for the next gear.
I've also noticed that when sitting still with the choke off, even when the bike is fully warmed up, revving between 2000 and 3000 rpms yeilds a random and repeated backfire from the right carb, which causes a very noticable miss. I don't notice it when riding because it passes by that engine speed while acclerating. For the most part, it's got good power and responds well.
I've pretty much ruled out a vacuum leak of any kind, although I haven't tried spraying starting fluid to see if engine RPMs increase. The bike only has 8600 miles on it and I had it apart yesterday for a valve adjustment. All the hoses are in pristine condition, connected, and all the clamps are tight. The only conclusion I can come to is that the carb is dirty from sitting so much. I just didn't expect this type of running from a varnished carb. Plugs are new, gas is fresh. Tried a tank with some Seafoam and that made no difference.
Anyone have insight on this? Do I just need to disassemble the carb and clean everything, or is this caused by something I'm overlooking? Soak carb parts in Berrymans, hand clean and re-assemble?
I greatly appreciate any input.
Upon cold starting, the bike fires quickly and seems to run really well with the choke about halfway on. But slowing it down, or turning off the choke completely even after a couple of minutes yields a very slow, lumpy idle and the sound of a 'miss'...not on every stoke, but on every few. I'm getting a 'sputtering' from the exaust. Once the bike is fully warmed up from a long ride, it either idles at a normal level, or a little high, so adjusting the idle up isn't a good remedy for cold idle. I tried it...it only exacerbates the following problem:
While riding, whether hot or not warmed up yet, it likes to hold onto revs, which makes shifting awkward since the engine is still revving by the time you're ready to release the clutch for the next gear.
I've also noticed that when sitting still with the choke off, even when the bike is fully warmed up, revving between 2000 and 3000 rpms yeilds a random and repeated backfire from the right carb, which causes a very noticable miss. I don't notice it when riding because it passes by that engine speed while acclerating. For the most part, it's got good power and responds well.
I've pretty much ruled out a vacuum leak of any kind, although I haven't tried spraying starting fluid to see if engine RPMs increase. The bike only has 8600 miles on it and I had it apart yesterday for a valve adjustment. All the hoses are in pristine condition, connected, and all the clamps are tight. The only conclusion I can come to is that the carb is dirty from sitting so much. I just didn't expect this type of running from a varnished carb. Plugs are new, gas is fresh. Tried a tank with some Seafoam and that made no difference.
Anyone have insight on this? Do I just need to disassemble the carb and clean everything, or is this caused by something I'm overlooking? Soak carb parts in Berrymans, hand clean and re-assemble?
I greatly appreciate any input.