Feuling Outer Crank Sprocket For Harley Big Twin Machined steel, stock replacement roller chain drive sprocket. Direct replacement for Oem. Also work on early 99-06 engines when upgrading to the hydraulic cam chain tensioners using the roller chain. These crank sprockets are designed with a tighter tolerance on the ID for better fit to the pinionshaft which aids in eliminating cam timing variance due to poor crank sprocket fit. Features 17 Tooth Replaces OEM 25673-06