I just gotta ask what is the purpose of the plunger on the top of the carb. I acquired a 2001 sportsman 90 with a completely torn out wiring harness. I have it rewired for the most part. But what does that plunger do? It would appear that it gets power from the thumb throttle. Mine is smoked, is there any way to bypass this? $110 bucks for a new one, WOW
ATVs - Polaris - Polaris ATV
Answers & Comments
The plunger mechanism serves a dual purpose. It houses the throttle body, which activates the throttle plate and forces the accelerator to a closed position via a spring. The second purpose is to control the needle jet that regulates the flow of atomized air into the throttle bore.
Read more: How to Install a Carburetor Plunger on a Motorcycle ' eHow.com http://www.ehow.com/how_7669098_install-carburetor-plunger-motorcycle.html#ixzz1EQKiL0Ol
you really do need the plunger, but it does not mean that you would have to by a completely new one.