I have noticed black soot on the end of my FMF MM 2 pipe on my Wolverine. Its not oil smoke. It doensnt smoke when idling. Could it be too large a main jet/ too rich? Its a 160 w/ dynojet. Didnt look at plug yet, just lookin for sugestions. I dont notice any smoke when im riding. I ride in Pittsburgh at about 750 Ft above sea level. It want there before I put in thejet kit.

[This message has been edited by boomer (edited 12-29-1999).]

[This message has been edited by boomer (edited 12-29-1999).]

 

my mm2 does that also on my 250x any sugestions would be appreaticeated (damn i really butchered that one)

 

I also have the same question. I have a 1999 400ex with FMF Powercore IV and K&N filter and jet kit. Runs great but I have noticed a little black soot build up on the screen on the tailpipe. Is it running too rich? Thanks

 

It could be Boomer, I have about the same mods. you do and I settled for a #155 jet(dynojet) due to it running too rich, lots of soot etc. and plug too dark etc. now don't get me wrong, I'd rather run a little too rich than too lean, a litle black stuff never hurt anyone.

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Harold Wells Raleigh NC 98 Wolverine& 97 Timberwolf Blueribbon Coalition Member

 

yeah but when is rich too rich

 

too rich is when performance suffers or your spark plug doesn,t last long or you get alot of backfiring on de-acceleration.

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Harold Wells Raleigh NC 98 Wolverine& 97 Timberwolf Blueribbon Coalition Member