The SP1 Pilot Air Adjusting Screw is a carburetor fuel system component designed to simplify idle mixture tuning on snowmobiles running SP1 pilot air adjusting screw 38mm 40mm Mikuni carb snowmobile setups. SP1 SKU 13-21500 fits all 38mm and 40mm Mikuni rack style carburetors, covering a wide range of Arctic Cat, Polaris, and Ski-Doo machines. Adjustments are crisp and repeatable thanks to the knurled head and flat head screw slot. At $5.99, it's one of the easiest ways to dial in idle without pulling the carb off the sled.
- Keeps idle mixture tuning simple with a knurled head you can turn by hand.
- Fits all 38mm and 40mm Mikuni rack style carburetors for broad compatibility.
- Designed for Arctic Cat, Polaris, and Ski-Doo snowmobile applications specifically.
- Delivers fast idle mixture adjustment screw snowmobile results without special tools.
- Built with a flat head screw slot so a standard screwdriver works when needed.
Order the SP1 Pilot Air Adjusting Screw for your Mikuni carb from Dillon Powersports, authorized dealer.