I had the 42mm RWR and it was ok but the 45mm is much better IT performs better than the 42mm. I don't care what anyone says, the accelerator pump has to go! Unless you are running a stage 2 or 3 kit you won't get it to work correctly no matter what you do! You need the compression from a taller piston to help with the bottom and mid. Remember the more air and fuel you put through the more compression you will need to compensate. Why else do you think bombardier doesn't put a 45mm on in the 1st place!? And if any of you guy's out there have gotten the accelerator pumps to work correctly, stop hoarding the info and help some of your fellow DS brothers out!. T.M>

 

Well you need to pump hooked up to stop that lean condition. Just keep the stoke very short.

 

"Why else do you think bombardier doesn't put a 45mm on in the 1st place!? "

Most of the people around here that put on aftermarket carbs are doing other things too, to move more air. Exhaust, carb mount filters, and high flow filters for example. The stock carb moves all the air the stock exhaust, air box, and filter can handle, but when you open all this up a bigger carb now has more potential.
You're a little too angry, bajaboy.