Very rich fuel, not FPR Issue?
I have a 2004 CBR600F4i and I am pretty unhappy with the mpg figures. All I can get is around 90-100 miles until the reserve light comes on.
After replacing this week, there is absolutely no difference to the consumption.
I decided to check the exhaust and held my hand close to the exit of the exhaust pipe and noticed unburnt petrol is spraying out of the exhaust pipe, especially if I open the throttle! :icon_emm:
So before you say spark plugs, I must say bike is at 34000 miles and plugs were changed at 28000. Oil changed recently about 1000 miles ago, I checked map sensor and vacuum hose, seemed to be correctly connected, checked air filter( was clean), checked the sensor on top of the airbox( disconnected and ECU gave a fault light so must be working right)...
I am not sure what else might be causing this but I am running out of ideas, and smell of unburnt petrol is noticeable when I first start the bike.
Performance-wise, there are no symptoms, it runs fine, idles normal, does not stall or knock, just consumes hell of a lot petrol.
People seem to be getting 150 miles per tank and me getting only 90 is just annoying, especially if I cannot pinpoint what might be the issue.
About the bike, it has a full Delkevic exhaust pipe on it, but it already had it when I bought it and did not have such poor mileage at that time. Other than that, only different part is K&N air filter but I do not think that is the issue.
If you could help me, I would be very grateful as I am stuck at the moment and do not want to take it to a garage since they dont seem to have a clue either.