They are threaded and will screw right on to your Amal 900 series carburetor

OIF (oil in frame) Triumph motorcycle head and allow you to run earlier 650 c

then it is on the shelf and ready to ship

Just install the steel bracket (applying loctite to the bolts when re-installing) then attach the aluminum license plate bracket

41 times to spin the rear sprocket one full revolution

#7706-2 Springer Spring Rod Bushings Harley-Davidson 45's And 1931-1945 Big Twin Springers Subcategory_T-Shirts They are threaded and willHarley DavidsonSpringer Spring Rod Bushings Fits Harley Davidson 45's and Big Twin Springers 1931 45, Made in Ohio, USA.