I just purchased a 2002 Yamaha wr 426. I was told by the sales person to remove the baffle in the exhaust, and something about a screw in the carb that can be cut which would give you more throttle. Taking out the exhaust baffle was not a problem, however I'm not to sure about exactly what screw to remove. I removed the black plastic throttle cover to take a look, and saw a allen head screw that I removed that is a little over an inch long with thread on the bottom, then the rest is a shaft. Is this what needs to be cut? I can't find the allen head screw in the owners manual, all they show is the throttle stop screw on page 4-16 in the owners manual (Is this the screw that needs to come out). Someone told me it was a allen head screw. Any help would be appreciated.