Speedo Seats & Luggage- racks Frame Chassis Suspension Forktubes Wheels Brake Fenders Gastanks Motorparts Gaskets Intake Transmission & Driveline Exhaust Electrical & Lights Handlebars, Cables & Mirrors Oil tanks Oil & Chemicals Fasteners Windshields Forward controls, Footpegs Miscellaneous MOTOR PARTS - LOWER END 10 619 AFTERMARKET PARTS & ACCESSORIES FOR CUSTOM MOTORCYCLES / MOTORCYCLESTOREHOUSE.COM 37-73 750, 1200 & 1340 SIDE VALVE CAMS FLATHEAD CAMSHAFT SETS Replacement camshaft sets for Side Valve (Flathead) models. Note: Installing WLDR style cams can be used to improve performance in any 750cc model. High compression heads (971198) and larger intake valves (971199) are advised for best performance. 971247 37-73 45" WL. Repl. 610-37, 611-37, 612-37, 613-37 971250 37-73 45" WLDR (High CR models) 971304 37-48 74" U, UL and 80" UH, ULH Replacement parts Replacement shafts only. Used to replace worn out shafts only when cam lobes are still within specs. 971616 Rear intake 971617 Rear exhaust (pump drive) 971618 Front intake 971619 Front exhaust 971247 Rippin' Flatheads! 971616 971619 971617 971618 961317 CAMSHAFT BEARINGS 58-99 B.T. (excl. Twin Cam) When still present it is advised to replace the low cost OEM needle bearing in 92-99 Evolution Big Twin models marked 'INA SCE 138 USA' with a 'full needle' bearing to increase reliability. Especially important when using higher lift cams, which increases stress in the camshaft bearing. Repl. 9058. 511350 Koyo (former Torrington) 'full needle' 511351 JIMS, 'full needle' 531300 S&S 'full needle' 99-17 Twin Cam; 17-23 M8; L58-90 XL The Factory redesigned the Twin Cam rear outer cam bearing from ball (OEM 8990/A) to a roller bearing style (OEM 8983/MCS 921138) in 2001. This was done to help prevent failing ball bearings on, specifically, rear (=drive side) cams that are heavier loaded. This 01-up roller style bearing is a 3-piece design that is more heavy duty than a ball bearing. No other parts changed during the bearing changes. The early 99-00 style ball bearings will still fit all 99-06 models front & rear. Using front & rear ball bearings present no issues on cam driven gears. Note: 06-17 Dyna, 07-17 Softail, 07-16 Touring and 17-up M8 models have no outer bearings at all. In these later models cams simply run in the aluminum cam support plate without bushing or bearing. 503608 921138 511350 511340 531300 The Factory started to use an inferior camshaft needle bearing, a 'non-full needle' design in 9299 on Evolution Big Twin models, to save costs. At this moment not many bikes will still have this early bearing installed. If still present it's advised to replace the OEM needle bearing, marked 'INA SCE 138 USA', with a 'full needle' bearing to increase reliability. Especially important when using higher lift cams, which increases stress in the camshaft bearing. A broken camshaft needle bearing can result in severe engine damage. tech-tip 54 566123 CAMSHAFT BEARINGS Outer bearing front/rear 99-06 TCA/B (excl. 2006 Dyna). Repl. 8990A 503608 Koyo (former Torrington) 961319 JIMS 978145 S&S 566123 Feuling 921136 Aftermarket Outer bearing rear 01-06 TCA/B (excl. 2006 dyna) OEM 3-piece style roller bearing that was used to replace the ball bearing. Repl. 8983 921138 OEM style Inner bearings 99-06 TCA/B (excl. 2006 Dyna). Repl. 9198 503594 Koyo (former Torrington), full needle 961317 JIMS, full needle 531301 S&S, full needle 566124 Feuling, full needle 06-17 Dyna; 07-23 Softail (excl. 110" Twin Cam); 07-23 Touring. Repl. 9215 2 bearings used for Twin Cam, 1 used for M8 motors. 961318 JIMS 531635 S&S 599091 MCS 566125 Feuling (2-pack) 993531 Feuling (1-pack) L58-90 XL Sportster. Repl. 9057 511340 Koyo (former Torrington) 961316 JIMS
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