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Help! My 79 xs11 misses at low speed while trying to maintain a steady speed. It seems to lurch more so than miss. It idles great accelerates great. I've colortuned it overhauled the carbs so many times I could do it in my sleep. No vacuum leaky. It will do it in any gear. I was wondering if anyone has seen this before.
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hi try checking the low and high tension circuits especially the pick up wires.also try your advance unit spray it with wd-40 or similar and watch it work,sometimes fine dirt can cause this to stick and give your symptoms,or even if the hose which connects this to engine is leaking that will do it.mick
xs1.1s(x2)
gsxr1100(1127)
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Or the broken advance wires......check the tech tips.....Gary Granger
Remember, we are the caretakers of mechanical art.
2013 Suzuki DR650SE, 2009 Kawasaki Concours 1400, 2003 Aprilia RSV Mille TuonoComment
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engine miss
Thanks for the input! The symptom is rather hard to describe. The engine seems to lurch rather than miss, similar to riding in high gear at a low speed when, which causes the bike to chug. I have already replaced the spark plug wires and rewired the pick up coil per previous info found here. (thanks) I have overhauled and adjusted the carbs numerous times. All jets and needles are correct and float levels are correct. It ran fine at one time and then suddenly began acting up. It must be in the mid range carb circuit, because idle, acceleration and high speed cruising are OK. In any gear while maintaining a constant speed is when it acts up. I have even used the colortune tool to adjust mixture. Anyone have any suggestions for flame color with the colortune that works best? And floats are adjusted from carb body base w/o bowl gaskets, right? I still ride it, but its not perfect. Thanks one and all for any tips !!
Very Frustrated, GregComment
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Just some suggestions . . .
Split/cracked vacuum advance hose?
Bad vacuum advance pot?
Vacuum advance line hooked up to wrong place?
Ballast resistor (under tank on left) shorting or bad connection to the harness?
Vacuum leak at manifolds (between carbs and engine)?
Carbs are synced right?
Bad/lose fuse box, main or ignition circuit?
Good luck!Comment
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