Hope that’s just debris, and not a nail in the rear tire!
Thanks! I did not know we can get rid of it for good! I also plan to kick it out, if malfunctions again.This valve is cheap and... useless I mean, I had the same problem but if I get it 2nd time I think I get rid of it. Looks like the idea is to maintain quieter exhaust at some point - for 100% it's mega silent at 50 km/h. We have some topics about it and how to clean or remove.
In the States we have a course from Motorcycle Safety Foundation (MSF). It's a private foundation, trainers are paid by students for the class which includes classroom and riding instruction. In many states, passing the (intro) class will get the student a motorcycle endorsement on the license. In my case, it was mandated by my employer (advanced class). I thought it was pretty good, the slalom training was particularly effective.Did the Bikesafe course myself a few years back - a good course