Andrews, Big Twin cam gear. Stock size (red) - L77-84 Shovel head; 84-99 Evo Big Twin (NU) 518020 XL models but 73-85 models

XL models but 73-85 models are wired for single filament bulbs and wiring must be adjusted accordingly

An integrated crankcase breather design eliminates the need for additional hoses and fittings

Hydraulic operated for automatic chain tension adjustments

Arlen Ness HANDLEBAR MODULAR 16 CHR

Andrews, Big Twin cam gear. Stock size (red) - L77-84 Shovel head; 84-99 Evo Big Twin (NU) 518020 XL models but 73-85 modelsRed, stock size. Crimp on installation on the camshaft. Used to correct backlash (free play) between the cam gear (on the cam) and the pinion gear (the smaller drive gear). Too much backlash will result in clicking, not enough backlash will result in a 'whining' sound. To correct backlash you can either use smaller or larger pinion gears or smaller or larger Andrews cam gears. Note: See 503768 (. 108") and 503769 (. 105") cam gauge pins to measure cam