Yamaha BWS 100 troubleshooting tuning

Hi there,

Looking for help with my BWS100. Apoligies in advance if this has been posted before. I have looked and cant find the specific help I need.

I have a standard Yamaha bws100, I recently added a technical exhaust pipe, Malossi variator, Malossi rollers, kevlar belt, and Malossi clutch.

The bike feels a little quicker but wont go faster then 60kmh

I have tried all different jets
95- wont go past idle
90 - Wont go past idel
85 - goes terrible
80 - Prob best jet gets up to 60
75 - gets up to 60, worried it's a bit too lean.

Does anyone have any recommendations for what I can try?