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1977 xs750 w/ MK I's........idles high or won't idle
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Posted 2014-03-22 7:03 AM (#132202)
Subject: 1977 xs750 w/ MK I's........idles high or won't idle


Posts: 9

I rebuilt my carbs with the K&L kit and am running with a 3-1 exhaust and PODs. The main jets are stock at 145, my needle is set to one notch below stock and the idle screws are about 2 3/4 turns out past soft seat.

I was able to get the bike to where it would start easily and idle well. I took it to the road and after about five minutes of ridding the bike began to idle at 3k. I stopped and adjusted the main idle thumb screw and got the idle down to 1k. Now at cold start, the bike is a little difficult to start and will only stay running if I feather the throttle. It will idle just fine once it's nice and hot.

The bike was doing this when I first bought it I was hoping I fixed it after the carb rebuild, carb boot replacement and tightening the cam chain.

Another issue is my left carb idle mixture screw. Using a new screw, I did the soft seat and turned it out 2 3/4 turns and the screw was a half thread away from falling out. I ended up re installing the old screw which has a flat tip causing it to be shorter than the new screw.

This is my first bike and carb maintenance experience and any advice would be awesome. Thanks.
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