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Ok-- checked the ground wire... everything seems okay. Does anyone know how important the secondary winding resistance is on the coils? I have a Haynes manual that isn't specific to the 1981 XS400 Special model... but was wondering if this could be it? I should mention-- if I ride the bike...

When I start it on the bike battery alone, it turns at the same speed when boosted. It actually fires sometimes-- usually on the first try, but then quickly dies.

So say that this is the case-- I'll test it tomorrow. What would the fix be? Thanks mmmboost.

Hi all, My love-hate relationship with my 81 continues. I have been having trouble getting this thing started. I got the carbs professionally cleaned with a fancy vibrating machine and new plugs, and the mechanic said that he had no trouble starting it up. I get home, let it sit for a week, it...

I was having problems with high idle, too, but when I replaced the intake boots, that helped. Seems like we're having very similar issues though... Also-- what does the inline fuel filter do?

Hi guys, I'm hoping that you can help me out. I enjoyed riding all summer on my 81 xs400 Special. But, I haven't been able to start it lately. I can get the thing to crank, but it won't turn over. What would work before was when put my hands over the carbs. It would crank right up. I replaced...

Looking for some help. The saga starts two years ago: I was really happy scooting around on my 81 XS400 Special. I rode it for about 6 months... it idled pretty high, but for the most part, it ran just fine. It didn't have an electric starter button, but I rigged one up that worked great. On a...