scooby Posted September 5, 2006 Share Posted September 5, 2006 (edited) i have a problem with my xs 400 se, it starts first time but wont rev over 1000rpm for a period of time and then all of a sudden it fires into life. its had new points fitted the timing set up carbs cleaned and balanced and a full service but still has this problem can anybody help please. Edited September 5, 2006 by scooby Link to comment Share on other sites More sharing options...
BrewTrooper Posted September 5, 2006 Share Posted September 5, 2006 Scooby, I just recently rebuilt my the carbs on my XS400 with a lot of help from Yamahead. I'm not a pro, but from my recent experience I'd look at the slides and see if they are sticking. They need a little lubrication to make sure that they move freely. If they don't slide...it won't rev. How does it react when you open the choke? BrewTrooper Link to comment Share on other sites More sharing options...
BrewTrooper Posted September 7, 2006 Share Posted September 7, 2006 Oh yeah, You also need to make sure that the slide needel CV Boot tabs are lined up with the index mark on in the chamber and that they are sealed well. They are raised via a vacuum so they need to be seated properly. Ken Link to comment Share on other sites More sharing options...
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