SRX600, I suspect u had an older version on your enticer. Anyone have any experinces with the more modern version of Dial-a-Jet? Here's the claims by Dial-a-jet

ial A Jet-"The Ultimate Jetting System" Does your snowmobile run considerably better when the temperature drops?? If it does, this means you are over-jetted the rest of the time! Your snowmobile can run strong all the time with Dial-A-Jet.
Allows you to run your snowmobile in a broad temperature or altitude range without having to rejet
Works great on stock or modified machines
Works on any style carburetor
Improves mileage and throttle response
Increases horsepower and performance
Excellent burn-down protection
A must with aftermarket pipes or engine modifications
Easy installation & low cost .
Three things trigger Dial-A-Jet's fuel signal: 1) engine pressure drop (vacuum or fuel signal); 2) acoustic sound signal which either amplifies or de-amplifies the reversionary pulse waves of the intake tract (we will explain more about the acoustics later); and 3) air flow and velocity. Dial-A-Jet works from just above an idle all the way to full throttle. Three things trigger Dial-A-Jet's fuel signal: 1) engine pressure drop (vacuum or fuel signal); 2) acoustic sound signal which either amplifies or de-amplifies the reversionary pulse waves of the intake tract (we will explain more about the acoustics later); and 3) air flow and velocity. Dial-A-Jet works from just above an idle all the way to full throttle.