Even if it needs a rebuild and you can get it for a good price I would buy it and if it needs a rebuild they are the easiest carbs to rebuild, you don't have to be a carb man all you have to do is look a the picture that comes with the kit.
I stole one of Nikkis cookie sheets and I use that to lay out all the parts when I'm rebuilding carbs.
It would be 1000% better than that P.O.S. Quadrapuke you have on there now!
