Thanks for the comments
. In the future i will probably go for another exhaust system altough the sound stock is far from bad. The suspension is ok for me except when i'm riding two up the rear shock gets suppressed with more than 7 cm which makes a hard ride on the bumpy belgian roads. I will probably change the rear shock and put some thicker oil in the forks and that will probably sort out everything. But first i have to save some money...