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335 Posts
Discussion Starter #1
i've got an 883 evo with samson 2 1\4 ripsaws, forcewinder intake. rejetted to a 170 main jet.

how do i diagnos without a dyno??

should i just buy extra jets and trial and error??

any insight is greatly appreciated.
 

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EvilMonger
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8,793 Posts
Spark plug color is a good start. Black sooty=rich, white=lean, cocoa brown=just right. there is more to it than that but its a good place to start.
 
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