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i was looking at my sled and then a measured my inlaws zr 500 sled that has flat slide carbs and there are the same distance as my 580 zr any body tried this little mod out , less throttle pull and easyer to tune al good to me.
 

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Why and how are they easier to tune? You have to follow the same procedure for tuning no matter what type of carb you have. I think the ZR500 use 38mm carbs, certainly they were 38mm when they used VM's (round slides). Do a proper set up on the old VM40's and get a Tempa-Flow and you'll never have to change jets again and it work great at all times.
 
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