{"product_id":"zodiac-721941","title":"S\u0026S Cycle S\u0026S Outer cam drive gear kit TC99-06","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eConverting from the stock chain driven cams to gear driven cams improves valve timing accuracy by eliminating timing chain lash. Another advantage is that you loose the chain tensioner shoes that wear out or even fail. Bolt-in cams do not require head work. \u003cbr\u003e Easy Start cams start any engine regardless of displacement or compression ratio, using your stock starter. Consequently, they save your starter and battery. They work automatic, no buttons to push. The two exhaust cam lobes are equipped with a spring loaded compression release lobe on the \"heel\" of the cam at the point where the valve would normally be fully closed. The lobe holds the exhaust valve open slightly at cranking speed. This releases some of the compression, making the engine much easier to crank. Once the engine starts, and rpm increases, the compression release lobe is centrifugally retracted and the engine runs normally, with full compression, and without any loss in performance. Easy Start cams have been tested for 100,000 accumulative starts and over 150,000 road miles without breakage or compression release failure.\u003cbr\u003e Complete S\u0026amp;S gear drive camshaft kits contain front and rear cam, all gears, gear cover gasket, bearings, retaining ring, o-ring, thread lock and instructions. For those who have already converted gear drive and just want to change to Easy Start cams and\/or valve timing we also have cams with just the inner gears available.\u003cstrong\u003e\u003cbr\u003e \u003cbr\u003e Notes: \u003c\/strong\u003eStock valve springs in 1999 thru 2004 Twin Cams can handle cams with valve lifts as high as .515\". Stock valve springs in 2005 thru 2017 Twin Cams can accommodate valve lifts up to .590\". The OES and 557 grind cams can be installed using the stock pushrods. However, we recommend S\u0026amp;S Quickee Adjustable pushrods ZPN 752108 for easy installation of all S\u0026amp;S cams.\u003cstrong\u003e\u003cbr\u003e \u003cbr\u003e OES grind:\u003c\/strong\u003e Original Equipment Specification (OES) A bolt-in replacement cam with stock cam timing is designed for riders with stock engines. Does not require tuning. Bolt-in stock. Equivalent to OEM A-Grind\u003cstrong\u003e\u003cbr\u003e \u003cbr\u003e 509 grind: \u003c\/strong\u003eDesigned as a bolt-in, high torque cam for 1999-'06 models. 180 psi cranking compression, no need for compression releases. For 88 CID engines with stock compression ratio. Idle-4500 rpm. Bolt-in torque.\u003cstrong\u003e\u003cbr\u003e \u003cbr\u003e 510 grind: \u003c\/strong\u003eDesigned as a bolt-in cam for 88, 95, and 96 CID engines with compression ratios below 9.7:1, stock, un-ported heads and stock valve springs or performance valve springs with less than 160lb. of seat pressure. 3000-5500 rpm. Bolt-in.\u003cstrong\u003e\u003cbr\u003e \u003cbr\u003e 551 grind: \u003c\/strong\u003eDesigned for engines with 96 to 106 CID and 9:1 to 9.9:1 compression, this is a bolt-in cam set designed for stock or mildly modified touring bikes. Not recommended for compression ratios of 10:1 or greater. Greatly improves low-end and midrange torque, strongest from idle-4000rpm. Bolt-in torque.\u003cstrong\u003e\u003cbr\u003e \u003cbr\u003e 557 grind: \u003c\/strong\u003eDesigned for 2009 to present Tri Glide models, this bolt-in cam, with its short duration, produces lots of usable torque. Has stock base circle that permits the use of stock pushrods. Bolt-in.\u003cstrong\u003e\u003cbr\u003e \u003cbr\u003e 570 grind: \u003c\/strong\u003eDesigned for 88 to 103 CID engines with compression ratios between 9:1 and 10:1, this bolt-in cam will provide a nice power increase across the entire power band. 3200-5700 rpm. Excellent bolt-in for overall power on 103\". Bolt-in.\u003cstrong\u003e\u003cbr\u003e \u003cbr\u003e 583 grind:\u003c\/strong\u003e Optimized for use in Softails and Dynas, this bolt-in cam makes horsepower and torque that you can feel all the way through the rpm range, making the most power right where you need it:1500-5000rpm. Bolt-in.\u003cstrong\u003e\u003cbr\u003e \u003cbr\u003e 585 grind:\u003c\/strong\u003e Designed for 88 to 106 CI engines with compression ratios from 9.7:1 to 10.5:1 and 106 to 124 CI engines from 9:1 to 10:1 compression. This bolt-in cam provides massive horsepower and torque increases starting at 3000rpm and holds steady all the way to redline. 3500-6000 rpm for 88\" - 103\" engines and 2500-5500 for larger engines.\u003cstrong\u003e\u003cbr\u003e \u003cbr\u003e 625 grind: \u003c\/strong\u003eCam set designed for 95\" or larger engines with compression ratios between 10.0 and 10.75:1. 3000-6000 rpm.\u003cstrong\u003e\u003cbr\u003e \u003cbr\u003e 640 grind:\u003c\/strong\u003e Used in S\u0026amp;S T124 engines, this cam makes horsepower! Intended for engines of 95 CID or more w\/ compression ratios between 10.5:1 and 11.5:1. 3000-6000 rpm.\u003cstrong\u003e\u003cbr\u003e \u003cbr\u003e 675 grind:\u003c\/strong\u003e A high lift monster, this cam set is designed for 120\" or larger engines with at least 11:1 compression ratio. 4500-6500 rpm.\u003cstrong\u003e\u003cbr\u003e \u003cbr\u003e MR103 grind: \u003c\/strong\u003eDesigned as bolt-in cams for stock 2012 and later 103 CI engines with stock 9.7:1 compression ratio up to 10.5:1. Works well with stock, un-ported heads, but is great for ported heads. More power across the rpm range best results from 2500-5500 rpm. Bolt-in.\u003cstrong\u003e\u003cbr\u003e \u003cbr\u003e HP103 grind: \u003c\/strong\u003eDesigned as bolt in cams for stock 2012 and later 103 CI engines with stock 9.7:1 compression ratio up to 10.5:1. Works well with stock, unported heads, but is great for ported heads. Ideal for lighter bikes and racing applications where getting the most horsepower from a stock engine is imperative. Best power in the higher rpm range, 3000-6000 rpm. Bolt-in.\u003cstrong\u003e\u003cbr\u003e \u003cbr\u003e 635HO grind: \u003c\/strong\u003eHigh lift cam for modified engines with 106\" or greater displacement and compression ratios between 10.0:1 and 11.0:1. Works well with stock, un-ported heads, but ported heads are recommended. Best power from 3000-6000 rpm. This is not a bolt-in cam set. High-lift springs and clearance checks are required.\u003c\/p\u003e\u003cp\u003eThunderMax Cams by Red Shift are designed to deliver unmatched performance and smooth, linear power with great valve train dynamics. ThunderMax cams are ground from one-piece 8620 steel billets utilizing the latest manufacturing techniques. Available in standard splined gear chain drive, or configured for use with S\u0026amp;S Gear-Drive gear sets. Red Shift recommends new cam bearings and performance tappets with any cam change. All ThunderMax cams require adjustable pushrods; spring work required unless otherwise noted as a bolt-in cam. Gear drive camshafts are supplied as a cam-only kit with front and rear cams only. For cam drive gears, as well as required gaskets, bearings and other hardware, see below.\u003cstrong\u003e\u003cbr\u003e \u003cbr\u003e Notes:\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003e•Early 1999 models may require the seperate purchase of ZPN 700835 splined cam sprocket. \u003c\/p\u003e \u003cp\u003e•Make sure you select the right cam for the job. Increasing compression ratio and\/or displacement beyond the recommended range for each cam will increase cylinder pressure, which makes the engine harder to start and more likely to ping or detonate. Lower compression ratios or displacements will weaken performance at low and mid range RPM.\u003c\/p\u003e \u003cp\u003e•A hydraulic press and other professional tools are required to install cams in Twin Cam engines. Additionally, material must be removed from the inner surface of the stock gear cover to install the S\u0026amp;S Gear Drive.\u003cbr\u003e •New cam bearings and a new gear cover gasket are required to complete this installation. These parts are provided in the Camshaft Installation support kit. If updating from the stock Silent Chain drive system on 1999 thru 2006 models (except 2006 Dyna), order 1 set cams, 1 cam gear drive kit ZPN721948 and a Camshaft Installation Support kit ZPN721950\u003cbr\u003e •If updating from the stock roller chain drive system on 2006 Dyna or any 2007-2017 Twin Cam model, order 1 set cams, 1 cam gear drive kit ZPN750871 and a Camshaft Installation Support kit ZPN750873\u003cbr\u003e •Due to the characteristics of gear drives, you may experience some valve train noise.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e S\u0026amp;S Cycle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct:\u003c\/strong\u003e Cams for Twin Cam\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment\u003c\/h2\u003e\u003cp\u003eOuter Cam Drive GearsAs included in complete cam kits. Includes pinion gear and outer cam gear., Fits 1999-2006, except 2006 Dyna\u003c\/p\u003e\u003cp\u003eS\u0026amp;S Outer cam drive gear kit TC99-06\u003c\/p\u003e\u003ch2\u003ePart Numbers\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eItem Number:\u003c\/strong\u003e ZPN721941\u003cbr\u003e\u003cstrong\u003eZodiac Part Number:\u003c\/strong\u003e 721941\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":62715265417603,"sku":"ZPN721941","price":300.26,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/zpn721941.jpg?v=1790636461","url":"https:\/\/hogparts.co.uk\/products\/zodiac-721941","provider":"Hogparts UK Ltd","version":"1.0","type":"link"}