well in about 86 from what i know the championship went to yamaha , with a very unpleased works rider that chased it all year on his cr500 . and the 490 was suposed to be pretty close to stock . speacial porting and exhaust .. but no fancy works backing.
some of the things i will try as these 490 were miserable to start .
clean the plug and add a primer from a snowmobile maybe a help for me .
i know enough to wind em up and clean the plug before you hit the kill . |