Re: jetting my overheating quad
The throttle position was varied, as I was just riding normal when the bike shut down, and not looking for a plug reading, if i had to choose a position it would be in the 1/2 to 3/4 range when the bike stopped and i pulled the plug. As far as altitude, all i can say is that it is set up for the montains, as i bought it two states over, the guy who sold it to me didn't know, but he said that the carb was jetted perfect to the plug for where he was. I did change the plug when i brought the bike home so it only was used for the one ride, so the reading would be true for ride-ing around here. I don't have a mikuni measure slide, but i now have the following jets 117.5, 120 ,122.5, 125. (there is a 115 in there now, these were the next four sizes up). Getting a needle is out at this time, as even the suzuki dealer does not seem to know how to convert their "mikuni #'s" to the standard mikuni numbers in the catalog. hopefully i can compansate for the needle with the main, i am not sure how effective it is going to be as every chart listing which carb piece affects where in the jetting is different an example is one says the main starts to pick up where the pilot ends, another says that the main only affects the wide open throttlejettint with the needle affecting everything in the middle. for now I am going to check out that sight curtisschults listed, see if i can learn more about jetting four strokes,tomorrow i will play with the main to see if i can get anywhere. thanks guys for all your help so far.
83 ATC 250r (with many extra parts 4 sale), 83 ATC 185s, 89 zuki' 250sport.