Afternoon all, I’ll probably butcher this description but hopefully someone may recognise what the issue or issues could be. This has happened only about 7-8 times over 100s of rides but when pulling away from a standstill but after about 3-10 minutes of riding (never from starting off from cold), as I’m releasing the clutch and get to the biting point the bike suddenly gives a little shunt forward and I hear a grating noise just for half a second and the brief surge forward is enough to make me lurch backwards and instinctively snap the throttle shut which has led to a couple of hairy moments especially when pulling away and turning at the same time. When it happens it only happens once and hard as I try, I can’t get it to do it on command and have never had it happen once on the bike for over 10 minutes or so. Could this be something tied to the pull away assist feature or the clutch giving up? When I got the bike, I wasn’t aware of the pull away assist and the previous owner had aftermarket levers that I found didn’t engage the micro switch so I made up something and bonded it to the level so it would engage the switch and I know it’s working as can start the bike with it in gear and the clutch pulled in. Another issue or it may be related to the above problem is when the bike starts and the weathers warm, there is a knocking sound from the top of the cylinders. When its colder weather you hear it only when the idle speed reduces after the fast idle wax unit has done its job. I suspected it’s the cam chain tensioner/s needing to be replaced but interestingly the noise stops when I pull the clutch in and returns when let out and eventually stops altogether after the bike has warmed up further. I thought, maybe wrongly, if it were the CCTs I’d hear it all the time. Other things to mention, I noticed the air temperature is reading lower than it really is now (20C when it’s 25C for example), engine temp looks normal still. Bike has Micron silencers but that’s it. Any ideas or suggestions greatly appreciated and sorry for the long-winded description.