This is the Main Oil Pump for the HS 800 and HS 1000 V-Twins and the Gasket is included.
Smaller Oil Pump mounted in Right Crankcase, 15500-010-0000
Please study the Parts File.
This Seal is for the Locking Rear Diff. Axles. These have a Solenoid that acticates from 1-WD to 2-WD for both the HiSun and ODES 800 and 1000. Odes does not show a Part # for this seal.