2009 Polaris Outlaw 450/525 Service Manual, Page 248Get this manual
8-6 Checking the choke slide
The choke slide should operate smoothlyThe choke slide piston should not have any deep score marks or depositsCheck the condition of the rubber boot and the choke lock
Checking the accelerator pump
Check the membrane for cracks or brittlenessCheck the gaskets for damageMake sure the bores are not clogged