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Discussion Starter #1
Any body understand why black soot is deposited on large diameter outlet , ie on stainless steel outer, and spotty black deposit on lower small diameter outlet? Done 1400 miles, with standard grade fuel but problem occured in last 300 miles.

If my Italian bike runs rich the exhuast blackens.

I presumed Honda sophisticated fuel injection management managed the mixture.

aardvark1614
 

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Your bike is Euro3 approved, so it means that the fuel injection is perfect.

You should ask your dealer (warranty) to have a look at the sensors.
Especialy the one which is analysing the outgoing gases.
 
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