Hey its me with the same problem but today i change the primary bolt stopper and the old one just only have a small dent or damge and it looks fine but back to the cvt i remove the side panel and the filter area of the cvt the black cover to hear a little bit more closer the noise and when a shift from drive to manual or from automatic to manual thats when the sound is really hard! But the burgmann stills run grat when i shift gear it do it perfectly! I dont know if that can make you help me a little bit more thanks!! In advance!!