Replaces the stock vent screw on all Big Twin transmissions 1936–79, which is often plugged by dirt. A plugged vent screw causes pressure build-up and consecutive oil-leaking. To make things worse an open OEM vent screw allows water to enter the transmission case when riding in the rain or washing the bike. Our new style vent screw with tube easily solves both problems.
- for Transmission
- fits 4-speed Big Twin 1936-1979
- stainless steel
Have any questions?
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