Engine PTO Drive coupler for Kawasaki 900. Commonly used on 1100 conversions in SXR, X2, SXi, etc where you need a coupler with larger 22mm threads for fit 1100 engine, but smaller outside diamer to match up to a 750/800 driveline. Please note, DOES NOT match up to an OE 1100 drive shaft coupler. Please emaill or call with questions before ordering.