Whenn hot my bike has started to clunk changing gear. I dont mean normal running hot i mean after i give it beans. I have Silkolene 10w40 oil in the bike. Did an oil filter change 1000 miles or so ago. Does oil go off? The bike has only just started to get used again and the oil filter change was about last October. The clunk is more so going down the box so i would doubt its the clutch starting to go.
Any pointers, ideas to try?