poor running /stalling after ten minutes running

Yamaha FZR 400 discussion forum:


poor running /stalling after ten minutes running

poor running /stalling after ten minutes running 
david said 2009-07-16 21:40 
 
bought a 89 1 w g as an unfinished project track bike.
every thing seemed normal started first click
there is a new akropovic straight thro silencer.
i have run it a few yards on the street but it will just die if left ticking over for a few minutes.
it is running rich plugs are sooty black.
best to re jet or change to original exhaust? 
 
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