Check out any of the fourteen Oil Hose - Oil Pump-tachometer Worm Gear components enlisted.
The O Ring(d:1.3,id:7.6) is the lowest priced item on this Oil Hose - Oil Pump-tachometer Worm Gear schematic.
The T20 Tc250 Scrambler 1969 Usa (e03) Oil Hose - Oil Pump-tachometer Worm Gear consists of fourteen pieces with the Gasket(10x16x3) (nas) being the most expensive.