You could go to a Mikuni the tunability and tech support is outstanding but they are somewhat more complex as your now adding another system component ,the needle jet. You could prob pick up a vm38 round slide which is kind of old school but works very well for our applications and there a lots of snowmobile tuning manuals available for that carb. I pulled one off of a 92 wr 250, bored it to 39 mm and put it on a 94 cr 500 where it worked flawlessly with a big scary top end gain.
Last edited by widebear; 09-27-2009 at 08:13 PM.
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