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I have the 2006 m109r. I did the 3'' air cleaner mod with the k&n cone filters, my exhaust is wide open (no baffles left what so ever), cobra fi 2000 fuel processor, brown wire mod to get rid of the fi light because I took off the exhaust control valve actuator, and have the timeing advance. I have noticed a very big drop in fuel millage and slight sputtering while cruising in the 2000-2800 rpm range.
I decided to change the spark plugs and also take the air box off out of curiosity. When I was in there I noticed the inside surface of the rear cylinder throttle body has a slight carbon or dirty oil film on it.
Does anybody have any idea on what could be the problem? I did not put the bike back together yet with the new spark plugs because of the film that I noticed.:dontknow:
 

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I have the 2006 m109r. I did the 3'' air cleaner mod with the k&n cone filters, my exhaust is wide open (no baffles left what so ever), cobra fi 2000 fuel processor, brown wire mod to get rid of the fi light because I took off the exhaust control valve actuator, and have the timeing advance. I have noticed a very big drop in fuel millage and slight sputtering while cruising in the 2000-2800 rpm range.
I decided to change the spark plugs and also take the air box off out of curiosity. When I was in there I noticed the inside surface of the rear cylinder throttle body has a slight carbon or dirty oil film on it.
Does anybody have any idea on what could be the problem? I did not put the bike back together yet with the new spark plugs because of the film that I noticed.:dontknow:
Likely the residue is from a previous slightly over filled oil change. It pools in the lowest place in the airbox--rear cylinder. You can clean it out and clean the airbox out. Would not worry a ton on that.
 
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