Part No. 27-1770
Mikuni N102.221 Small Round Main Jet
Applications: Personal Watercraft (High Speed Jets) Super BN 38, BN44, BN46, BN38I, BN40I, BN44I, BN46I,
Some, but not all of the possible applications are listed

below:
Kawasaki KSF400 ?KXF? (03-06) Polaris Predator 500 with Mikuni BSR carburetor
Polaris Outlaw 500 with Mikuni BSR carburetor Suzuki ALT50 (1983) Suzuki LT50 (84-87) Suzuki LT-A50 (02-05)

Suzuki LT-Z400 Suzuki DR-Z400 with Mikuni carb,
Suzuki SV650 Yamaha Generator (3G2) Yamaha YFM660 Raptor Yamaha YXR660 Rhino Side x Side
Super BN 38, BN44, BN46, BN38I, BN40I, BN44I, BN46I