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 10 611 AFTERMARKET PARTS & ACCESSORIES FOR CUSTOM MOTORCYCLES / MOTORCYCLESTOREHOUSE.COM EARLY TO LATE TWIN CAM CONVERSION CAMS - CHAIN DRIVE Converts 99-06 Twin Cam to 06-17 style ANDREWS. TWIN CAM CONVERSION CAM SETS These cams are used to to convert a 99-06 Twin Cam from the early stock 'silent chain drive', which is equipped with spring adjusters, to the '06-17 roller chain drive' with hydraulic adjusters that work on engine oil pressure. This roller chain and hydraulic chain adjusting system, which is much better than the early system, is used in all 06-17 Dyna and 07-17 Softail and 07-16 Touring models. Note: Cams are for use with splined (00-up style) driven gear. For 1999 Twin Cams splined 503575 driven gear must be purchased separately. Note: See 'Additional parts required for installation' below. These are not available through Motorcycle Storehouse, unless the MCS part number is mentioned. 12N / .489" LIFT Bolt-in cam grind with same output as stock cam. 88 inch. Slight power increase but no retuning necessary. 503697 99-06 TCA/B (excl. 2006 Dyna) 21N / .498" LIFT Bolt-in. More torque for allround riding. 88 inch and std CR, stock pistons and heavy bikes. Works well with both carb and injection. Stock springs OK. 1700-4800 RPM. 503698 99-06 TCA/B (excl. 2006 Dyna) 26N / .490" LIFT Bolt-in for 88-95 inches and stock CR. Good for two-up touring. More torque and horsepower at lower and mid RPM range. Works well with both carb and injection. Stock springs OK. 1800-5200 RPM. 503699 99-06 TCA/B (excl. 2006 Dyna) 31N / .510" LIFT Great cam for 95" motors and 9.8 to 10.2 CR. Lower TDC lift for easy installation. Similar to TW37 with different timing. Works well with both carb and injection. Stock springs OK. 2200-5800 RPM. 503701 99-06 TCA/B (excl. 2006 Dyna) 37N / .510" LIFT Hot street cam for 88 to 95 inch. Twin Cam 88's have shown 80+ horsepower on rear wheel, more with 95 inch. Smooth idle, broad torque band. Runs best with low restriction exhaust. Works well with both carb and injection. Stock springs OK. 2200-5600 RPM. 503702 99-06 TCA/B (excl. 2006 Dyna) 50N / .510" LIFT 95 inch engines. 9.5 to 9.8 CR with stock heads. Torque and horsepower at mid to high RPM. Stock springs OK. 2400-6000 RPM. 503704 99-06 TCA/B (excl. 2006 Dyna) 55N / .550" LIFT 95 inch engines. 9.8 to 10.2 CR. Maximum torque and horsepower at mid and higher RPM ranges. Use high-lift springs. 2600-6200 RPM. 503706 99-06 TCA/B (excl. 2006 Dyna) 503707 25675-06 39969-06 25683-06 25355-06A 39968-06 25673-06 ADDITIONAL PARTS REQUIRED FOR INSTALLATION Below mentioned parts are required for installing conversion cam sets. Note: Parts are not available through Motorcycle Storehouse at this moment, unless a MCS part number is mentioned. They are placed for your convenience only. Various 921600 Oil pump assembly. Repl. 26037-06 -- Cam support plate assembly. Repl. 25355-06A 921603 Ret. ring, outer front camshaft. Repl. 11461 921604 Inner roller chain. Repl. 25683-06 921606 Outer roller chain for Twin Cam, only chain for M8 models. Repl. 25675-06 921617 Outer + inner chain tensioner kit. Repl. 3996806 & 39969-06 921614 Crankshaft sprocket/cam drive gear 17T. Repl. 25673-06 Rear camshaft driven sprocket 34T 503707 99-01 TCA/B. Andrews with ignition trigger ring 921615 02-06 TCA/B. Repl. 25728-06 TWIN CAM ADDITIONAL PARTS REQUIRED FOR INSTALLATION* ANDREWS CAMSHAFT SPECIFICATION CHART Intake° Exhaust° Duration° Valve Lift Valve Lift TDC Open/Close Open/Close In/Ex In/Ex In/Ex 12N 02/34 37/05 216/220 .489" .091"/.106" 21N 10/30 40/08 220/228 .498" .134"/.121" 26N 11/35 41/09 226/230 .490" .138"/.112" 31N 10/46 52/08 236/240 .510" .131"/.120" 37N 18/38 46/14 236/240 .510" .174"/.148" 44N 21/41 49/17 242/246 .495" .182"/.158" 50N 20/48 54/18 248/252 .510" .184"/.168" 55N 22/46 52/20 248/252 .550" .197"/.181" Timing and duration measured at zero lash and .053" tappet lift off base circle. To avoid coil bind, allow min. .030" more free valve travel than the max. valve lift that is mentioned. To achieve adequate valve spring clearance, several higher lift top collars are available which require no machining. 99-06 TO 06-17 TWIN CAM CONVERSION
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