they are 1 inch diameter with a 3/8 inch shaft for the spring to sit over

These Exhaust Port Clamps are a reproduction of the originals and fits 1960-1965 Harley-Davidson Panhead motorcycles

washers and locknuts mount gas tank on 2004-up Sportster

All Harley-Davidson 1910-1948

Big Sucker Stage 1 Air Filter Kit - Black - 1988-2020 Harley-Davidson XL Length_.375" they are 1 inch diameterThis is a super clean and simple high performance air cleaner, we have used these on several shop bikes including the new Saturday Sportster Tracker project! For full fitment please see the additional information tab below. One piece aluminum backing plate carb support bracket with patented hidden breather technology and radius air inlet Breather passages exit at the mouth of the carburetor throttle body, creating a virtually closed loop system Kit