Pdedse, my remarks are based more on my experiences with Porsche cars than motorcycles, but there may be some crossover. In instances where I saw a significant drop in mileage, causes were traced back to
Dirty oil
Clutch performance
Spark plugs
Vacuum leaks
Brake pads
Tire pressure
Tire wear
Sound like you have already discounted a few items on my list. I am sure our friends on the Forum can be of more assistance than me. David
Dirty oil
Clutch performance
Spark plugs
Vacuum leaks
Brake pads
Tire pressure
Tire wear
Sound like you have already discounted a few items on my list. I am sure our friends on the Forum can be of more assistance than me. David
2017 Honda CB1100 EX
The most sophisticated, smooth, perfectly engineered motorcycle I've ever owned. A pleasure in every way.
The most sophisticated, smooth, perfectly engineered motorcycle I've ever owned. A pleasure in every way.