07 Yamaha R1 – Rough Idle
The bike runs perfectly above about 3,000 RPM.
At idle though it’s pretty rough. When it’s cold the idle is a little higher and sounds perfect. Then when it warms up a bit it starts to idle low and rough to the point of nearly stalling. Also, it’s a little sluggish in 1st gear up to about 3,000 RPM. After that it’s perfect.
It has an akrapovic exhaust, exup valve is removed, 02 sensor still in. I’ve had this bike for years with the same setup and the idle has always been fine up until now. It just developed this problem in the last month.
Stuff I’ve tried.
1. I changed all the plugs. No change.
2. I changed the O2 sensor, No change.
I recently tested all of the coils and they were fine.
At this point I’m happy to take it to someone to try to figure it out. Just wondering if anyone has any recommendations for someone who knows how to troubleshoot R1 idle issue.
Note: the 2007 R1 was the first with a fly-by-wire throttle, so there is no way to manually adjust he idle that I’ve been able to find.