S&S Cycle 509G Gear Drive Cam Kit for 1999-2006 Harley-Davidson Twin Cam Big Twin

S&S Cycle 509G Gear Drive Cam Kit for 1999-2006 Harley-Davidson Twin Cam Big Twin

Trade the maintenance concerns of a timing chain for a gear drive that just works – session after session, mile after mile. Gear drive cams transform not just how a Twin Cam performs but how it sounds and feels at the grips, delivering mechanical precision that riders who have made the switch rarely want to give back.

Key Features

• Gear drive eliminates the cam chain and tensioner – no tensioner maintenance required
• Compatible with factory valve springs – no spring upgrade required
• No cam chest machining required for installation
• Eliminates timing chain noise and lash for more consistent power delivery
• Direct gear-to-gear drive system for long-term reliability

Technical Specifications

• Lift: 0.509″
• Drive Type: Gear Drive
• Compatible Engine: Twin Cam 88

Fitment Notes

• Fits 1999-2006 Harley-Davidson Big Twin models
• Does not fit 2006 Dyna models
• Compatible with stock valve springs – no additional spring upgrade required
• Review the Fitment tab for complete year and model breakdown