Runs when cold warms up and dies.

79 Yamaha XS 400 discussion forum:


Runs when cold warms up and dies.

Runs when cold warms up and dies. 
M. Allred said 2008-08-31 09:48 
 
I Thought I knew what I was doing. 9K miles, new plugs, new points and condenser, gone thru carbs they are clean and have new needles and seats. Diaphrams okay, rebuilt petcock, starts second kick when cold runs great for five minutes then dies one cylinder at a time. Won´t start again until cooled off. Any Ideas? I am going to try adjusting the valves and setting the timing, could use a little advise, what am I missing?? Thanks 
 
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