So I have a 2000s rmk engine in a older wedge. It is a 600, I have 700 carbs, jugs, reeds, head, an pistons. Could I swap out the top end? If so what would I have to do to the jetting? Any knowledge is appreciated!
I am going to say doubtful as iirc the cases are different not too mention possibly the CDI, muffler, water pump, recoil, and the clutching will be different as well most likely,, not too mention if one is a has those valves and the other doesn't. It just isn't a easy swap. Tbh if you are going to do this then buy an 700 from a wrecked sled.
And imho you will not see that great of a HP increase for all the work you are going to do. If it was me I would go aftermarket reeds, boost bottle, new clutch springs, aftermarket helix in the secondary and be done with it. Too much work for such a little increase in power vs what I listed which would bring it up damn near close if not above what the 700 has now.