I just bought a 94 zr 580, carb. It was running awsome in the cold weather but now that is warm out it boggs out so bad that it stalls, cant even idle. Now im told this is noraml but not from a reliable source. And also when running good in the cold once i hit 50mph the speedo went all krazy. Now would that be a drive bearing doing that? Any help would be appreciated, I havnt owned or dealt with a sled in like 15 years. If you dont use it ya loose it.