I have one of these bad boys on a 632,its new and I haven't tried it yet.
Soon hopefully tho,That carb made the engine run really nice right out of the box. Well I did a few minor adjustments,nothing serious
Great product,and service
Patrick is the man
http://www.pro-system.com/
Notice there is a nice little calculator in this link,neet stuff
http://www.pro-system.com/calc.html