S&S Cycle Gear Drive Cam Chest Kit Without Cams For Harley Twin Cam (2006–2017)
Complete Billet Oiling & Gear-Drive Conversion System for Late Twin Cam Engines
Eliminate tensioner wear and optimize engine oiling on your V-Twin with the S&S Cycle Gear Drive Cam Chest Kit Without Cams. Purpose-built for 2006 Dyna models and all 2007 through 2017 Harley-Davidson Twin Cam engines, this comprehensive chest pack provides all the high-performance oiling and support components needed to convert your motor to rock-solid gear-driven timing—allowing you to supply your choice of gear-drive camshafts.
At the core of this kit is S&S’s blueprinted billet aluminum high-flow oil pump and matching billet cam support plate. Together, they increase scavenge and oil feed pressure, eliminating oil sumping and protecting critical bottom-end bearings under severe heat and load. Upgrading to gear drive eliminates chain tensioners entirely, delivering dead-accurate valve timing and reducing internal drag.
Technical Specifications & Product Details
| Feature / Metric | Product Specification | Rider Benefit |
|---|---|---|
| Brand / Manufacturer | S&S Cycle (Made in USA) | Gold-standard American engineering with precision tolerance manufacturing |
| Drive Type | Gear Drive Conversion (No Cams Included) | Eliminates chain tensioners and timing chain slack for exact valve timing |
| Oil Pump System | Billet Aluminum High-Flow / High-Scavenge | Increases oil pressure and oil return flow to prevent sumping under heavy load |
| Cam Plate Material | CNC-Machined Billet Aluminum | Provides maximum rigidity and resists flexing under high spring pressures |
| Included Components | Pump, Support Plate, Premium Lifters, Gaskets | Complete foundation pack allowing custom gear-drive camshaft selection |
Engine Dynamics & Gear Drive Performance
### The Gear Drive Advantage for Twin Cam Motors
Chain-driven camshaft setups rely on plastic shoes and mechanical tensioners that break down and wear over time, filling your engine oil with debris. By converting your 2006–2017 Twin Cam to an S&S gear drive setup, you remove plastic tensioner wear completely. Gear-driven cams eliminate timing lag caused by chain stretch, improving engine throttle responsiveness and giving your valve train crisp, precise operation across the entire RPM range.
### Key Performance Benefits
Vehicle Compatibility Guide
S&S Cycle Gear Drive Cam Chest Kits (Without Cams) offer direct fitment for 2006 Dyna models and 2007–2017 Harley-Davidson Twin Cam 96ci, 103ci, and 110ci engines setup for gear-drive camshafts:
### Compatible Harley-Davidson Twin Cam Models (2006–2017)
- Harley-Davidson Dyna: FXD, FXDB, FXDL, FXDF, FXDWG (2006–2017)
- Harley-Davidson Softail: FLS, FLSTC, FLSTF, FXSB, FXST (2007–2017)
- Harley-Davidson Touring: FLHX, FLTRX, FLHTK, FLHR (2007–2016)
- Harley-Davidson Trike: FLHTCUTG, FLRT (2009–2016)
Fitment Note: Requires gear-drive style camshafts with a .875″ pinion journal diameter (sold separately). Pinion shaft runout must be measured prior to installation and must be less than .003″ for gear drive operation.
Step-by-Step DIY Installation Overview
Installing an S&S Cam Chest Kit is an advanced mechanical upgrade. Estimated installation time: 3 to 4 hours using standard engine shop tools.
### Required Tools
- 3/8″ Drive Torque Wrench (in-lbs and ft-lbs)
- Dial Indicator with Magnetic Base (for measuring crankshaft runout)
- Cam Gear Locking Tool / Press Setup
- Quick-EE Pushrod cutters or adjustable pushrod installation tools
- Assembly lube, engine oil, and replacement gaskets
### Step 1: Disassembly & Pinion Shaft Runout Measurement
Safely secure the motorcycle, drain engine oil, and remove the outer cam cover, floorboards, and exhaust headers. Remove stock pushrods and extract the factory cam plate and oil pump. Place a dial indicator on the end of the crankshaft pinion shaft and rotate the motor to measure total indicated runout (TIR). Runout must be .003″ or less to run gear-driven camshafts safely.
### Step 2: Assembling the Billet Plate & Oil Pump
Lube all oil pump gears and internal relief valves with clean assembly lube. Install your selected gear-drive camshafts into the S&S billet cam plate. Align the timing dots on the inner cam gears, press the assembly into the plate, and mount the S&S billet oil pump loosely over the pinion shaft before centering and torquing the plate to specification.
### Step 3: Installing Outer Gears, Lifters & Final Clearance
Press outer drive gears onto the camshaft and pinion shaft, ensuring outer timing marks align perfectly. Check gear backlash using a dial indicator to ensure proper mesh clearance. Install the included premium S&S hydraulic lifters, set adjustable pushrods to pre-load specifications, reattach the outer cam cover with a fresh gasket, fill with fresh engine oil, and prepare for initial startup.
Frequently Asked Questions
### What pinion shaft runout limit is required for this gear drive kit?
For gear-drive camshaft setups on Harley Twin Cam engines, crankshaft/pinion shaft runout must be .003″ or less. If your crank runout exceeds .003″, you must either truant/weld your crankshaft or opt for an S&S Chain Drive Cam Chest Kit instead.
### Does this kit include camshafts?
No. This kit includes the complete high-flow billet oil pump, billet cam support plate, high-performance hydraulic lifters, outer drive gear hardware, and gaskets. Camshafts are sold separately so you can select the perfect S&S or aftermarket gear-drive cam profile for your specific build.
### Order Your S&S Gear Drive Cam Chest Kit Today
Eliminate tensioner worries and upgrade your 2006–2017 Harley Twin Cam engine with ultimate oiling efficiency and rock-solid gear drive stability. Order your **S&S Cycle Gear Drive Cam Chest Kit (Without Cams)** today with fast shipping!
