Hello all! I'm about to make an oil change to my KTM 990 Adventure S and I'm thinking on filling this oil additive before putting the new oil: https://www.aditivox.com/xenum-mflush I want to put it meanly because gears are a little bit rough (something "normal" on all bikes with oil about to change), the fact that the last time that I did an oil change there were a few metallic parts in the screens and also because the clutch lubrication tube was clogged 3 months ago and I needed to open the case and solve it. Has anyone tried this brand? Another one? What's your opinion? Thanks!