Take out the spark plug and look into it with a flashlight at bottom dead center.
It will say 1uy if stock, if high compression it will have a big hump in the middle and a few numbers on top that will tell you compression ratio and bore size if you look it up.
Check all the engine mounts.
Are you running an air box? If no the air box supports the carb and you need to supoort it to prevent ripping.
Was it a cheapie eBay boot? They suck, you have to go OEM for them to last.