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mtbrights · 11-08-2008, 07:13 PM

My o1 has a slip on Two Bros muffler, otherwise stock. I bought it used this spring (19K) and ran it this summer. It runs rougher at 3-4k than I would think it should and the bikes midrange is (very) flat until 6500-7K when it runs nice and clean. Throttle response is also difficult to manipulate in parking lot situations. on/off etc...

I suspect it's running lean until the 6500 RPM level, because it's like flipping a light switch, but don't know what the algorithm looks like for the stock fuel injection. I've searched for threads in this regard but haven't come across this particular problem on this board.

I may have to resort to Dynojet but I would prefer to rule out any potential FI problems beforehand. Any thoughts.

Edit: No codes flash on the FI light.

11-08-2008, 07:13 PM	#1 (permalink)
mtbrights Junior Member Join Date: Oct 2007 Last Online: 09-01-2009 07:47 PM Posts: 11 Thanks: 0 Thanked 0 Times in 0 Posts	01 Fuel Injection question My o1 has a slip on Two Bros muffler, otherwise stock. I bought it used this spring (19K) and ran it this summer. It runs rougher at 3-4k than I would think it should and the bikes midrange is (very) flat until 6500-7K when it runs nice and clean. Throttle response is also difficult to manipulate in parking lot situations. on/off etc... I suspect it's running lean until the 6500 RPM level, because it's like flipping a light switch, but don't know what the algorithm looks like for the stock fuel injection. I've searched for threads in this regard but haven't come across this particular problem on this board. I may have to resort to Dynojet but I would prefer to rule out any potential FI problems beforehand. Any thoughts. Edit: No codes flash on the FI light. Last edited by mtbrights; 11-08-2008 at 07:41 PM.