Modern Vespa

Hi, i am new here, not sure if this is the right place to ask, but need your help.

My 2012 Vespa Primavera 150v has a clunking noise at the rear wheel (seems to be coming from the cvt side) whenever i hit an uneven road or bumpy road, and the sounds seems getting worse.

What could be the reason? I will try to get a video of it but it's hard because can only hear it when i am riding on the vespa. Checked the exhaust as well, all the nuts are tightened.

Could it be the rear axle? Is there any bearings there that might need to get replaced?

djazmy.....what's the mileage and maintenance on the drive system?

Mileage is 30,000 Km and just changed all the belt, rollers, sliders and oil change as well

Does it sound like when you change gears on a 10-speed bike and the chain is trying to climb up to a bigger sprocket? If so, I was told for the age of my scooter that was a "normal" sound.

Gotta ask....did it make the noise before doing the work?

Could be the rubber damper in the shock end.

not really, just clunking sound like something want to came off. Thought it was the exhaust at first, but after checking, it was the rear wheel and the cvt side as well

noise was after the work, but probably around 300km after that (around 1 week)

Try pulling the rear wheel to see if anything moves left to right, to see if rear wheel bearing is ok

was the main stand lubed at the same time?

could it be slapping when you go over a bumpy surface?