I am rebuilding a 86 kx80 and am running into a few set backs with this little project. I was looking online at carbs either off a bike or after market. In my search i found non but websites saying carbs from 1979-2000 were the same, so i bought a 1998 carb. the problem i am running into in that my original intake boot is not fitting the carb. My stock boot on my 1986 kx is bigger in diameter then the 1998 carb. I am thinking maybe the carb i bought came off a kx65 but not sure. I am looking for any info on this part wise, what i should be looking at, and or any ways to trouble to shoot this. I also found out that the stock carb is a mikuni and the one i purchased is keihin. would this make any difference? did i get the wrong carb? or is there another boot i could by from a different year that would fit?