what jet kit should i use for my ds650, i have a tm45 carb, and a ronwoods pipe, with a ronwoods rev limiter.oh also will i see a big improvement if i get the pump activated.

 

Pump activated is a necessity if you're going to be duning. Gets rid of the stumble/bog when you stab the throttle.
We need to know where you're going to be doing the most of your riding to get you dialed in jet wise. Elevation, humidity, density all come in to play. What gearing and tire size are you running? How big 'a boy are you?
All of it matters!