Re: yz 80 need some help.
you could alwasy put a tiny front sprocket on it and gear it way down... Its hard to say if it will make it better or worse. I would say one good way would be to restrict the exuast alittle.. Try and put a plate over the exuast that will make the hole smaller.. Dont clean the air filter till she fouls a plug... He's also right about th epower valve.. Im dont knwo which style yours is but usualy there is a rod coming up from the bootm end to the valve. If thats so taking the nut off and leave the rod disconnected will keep it from revving out.