Originally Posted by dreccles
A K&N Filter and a Stage 1 DynoJet kit change the bike completely! :-)
Lot's more power across the entire rev range and Easy wheelies!
You do get a bit more power down low but peak horsepower is affected very, very little.
Richening up the mix a bit at the lower end makes a positive change to the rideability of the bike, I think, but I don't think the Dynojet kit is the best way to accomplish it.
You will definitely say "adios" to your gas milage using that kit.
Turning out the mixture screw and shimming the needle is by far a cheaper and better way to go, I reckon.
EDIT: I should specify that this was from a Gen 1 (pre-2008) KLR. Not sure how much the later motors have changed...