black carbon deposits around the exhaust tip

[flyingz06]

why?  Ive never had a bike do this, but all my bikes have had chrome like tips and I've never noticed it.

[w8d4it]

Sounds like you are running rich.  Another thought, what grade fuel are you using?

[flyingz06]

93 octane usually.  Running rich.....could that be me hesitation issue at take off and the hesitation at times while cruising?   I assume dealer can adjust?

[w8d4it]

The Trophy is designed to run on regular, not premium. I had exactly the same problem plus hard starting on my 2011 Thruxton (which also was designed to run on regular) until I stopped using premium and switched to regular. 

[flyingz06]

hmmmm.  will i mess it up if my next tank i put in the 87 octane?  Cant imagine I would. 

when you said mine did the same.... you referring to carbon deposits only or the hesitation part also?

[w8d4it]

Both. Just start running 87 and see what happens. When I switched I started running either Shell or Chervon religiously and the change was remarkable.  But I imagine any quality regular will do.

[patches]

I also ran 93 octane in mine for a while (no good reason just ...) and experienced the same "runabilty" issues.  Switched back to regular about a tank or so ago and it does run better.  Some engines designed to run on 87 do actually run worse on 93.  It seems this is one of them.

[flyingz06]

thanks guys!  I'll try it