
27 May 2009
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Registered Users
HUBB regular
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Join Date: May 2009
Posts: 24
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1984 Yamaha XT 600 high RPM sutter/cutting out!!
Hi All,
I know others have experienced the same situation and I haven't heard of a cure as of yet. I have a 1984 Yamaha XT 600 that misses at 3/4 to full throttle. Even if I pull in the clutch at full throttle, it will continue to miss as if it has a rev limiter. I have double checked all the full system and carbs to make sure all is clean. Checked the secondary carb diaphram - good. I have a Super Trapp on the bike and have increased both carbs mains 2 sizes from stock with no luck. The plug and Super Trapp have black soot showing signs of plenty of fuel.... "rich" if anything. I was having a hard time figuring if it was starving for fuel or electrical, but since I have increased the jetting with the same missing occuring, I think it must be electrical/ignition realted. The kick stand switch has been bypassed. The air box and aircleaner are free/clean... no restrictions. Any ideas/cures would be greatly appreciated!
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