It winter over hear and a good time to go through the whole bike. So far I have cleaned and repacked with greased all the linkage, swingarm and steering head bearings. Today I started the piston and cam chain replacement. Bike is 08 with 75h on it. First of all, I was kinda surprised to find that one exhaust valve was on a tight side (15 fit, 20 did not) and the right intake valve was too large (25 fit, 30 did not !!!!!!). I shimmed them away and put aside. Now, I took of the cylinder and it had been worn more then I had expected. Piston seemed to be OK. Here are some pictures: As you can see, the front and rear of the cylinder has some vertical lines. So I took out my hone and did my first time deglazing: The out come was not as good as I had expected (again), because I moved the drill too slowly and didn`t get the right angle, but decided to leave it ( I did 4 passes up and down). Before putting it back together, I also changed the cam chain and replaced the sparkplug with NGK IX one.The cam chain had stretched about 2mm I think and had couple of links that were a bit stiff. I installed the piston using tungstendisulfide (quickseat) on cylinder walls, rings and piston skirt. Piston is CP 13:1. Now I need to get a torque wrench to get top end bolts and cam cap bolts tightened. After that, fingers crossed.