Originally Posted by anotherguy
Getting the jetting spot on was the best thing I did for my '80 465. It now pulls clean from idle to where it signs off.
Any details on the jetting that worked for you? I've been collecting info on jetting the YZ465. So far most install a slightly smaller pilot jet, main jet and modify the slide cutaway to 3.5. Each one, I've checked use's a different needle jet, at different clip positions. I also I think slightly different carburetors are in use. One is the Stock 38mm round slide and the other is a replacement Mikuni 38mm round slide. I don't know how different they are?