Smell rubber burning when im riding

Hi guys well as the title says really, when im riding my bike I can smell rubber when im buring, do any of you know why this might be ? cheers

 

probably something in transmission , check if you fitted the front pulley straight with all washers inside

 

I have never touched the transmission the only time its been touched was 7 months ago when my rollers got put in

 

and that was by a scooter mechanic

 

oh not sure then , check your oil pump belt( behind the variator ) might of went

 

wheres that ?

 

Behind the variator, take the nut off your crank take the front pulley off and variator and you should see it