Hello, strokers.

I bought a 1998 RX-135 4S recently. I have been having missing issues in the bike. I did everything from cleaning carburetor to washing the petrol tank to tuning carburetors to various adjustments. The missing issue often comes when I ride the bike down steep roads without applying throttle.

The other problem I face is that while applying clutch in order to change gear, I hear growling noise (sounds like increased rpm).

Waiting curiously for the answers... thanks in advance.