Twin Power 66-Tooth Starter Ring Gear for 1998-2006 Harley-Davidson Big Twin (Exc. 06 Dyna)

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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About TwinPower

TwinPower engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full TwinPower lineup with fast shipping and expert fitment support — order with confidence.

Twin Power 66-Tooth Starter Ring Gear for Harley-Davidson Big Twin (1998-2006, Except 2006 Dyna)

This 66-tooth starter ring gear from Twin Power is designed for 1998-2006 Harley-Davidson Big Twin models (excluding 2006 Dyna) and requires a 9-tooth pinion gear for proper operation. It's a key component for ensuring your motorcycle's starter system engages effectively and cranks the engine reliably. This gear is manufactured to meet stringent quality standards for durability and performance.

Key Features:

  • Specific Application: Fits 1998-2006 Harley-Davidson Big Twin models, including FLHR, FLHRCI, FLHT, FLHTC, FLHTCI, FLHTCUI, FLSTC, FLSTF, FLSTS, FLTR, FLTRI, FXD, FXDL, FXDS-CONV, FXDWG, FXSTC, and FXSTS.
  • 66 Teeth: This tooth count is specifically designed to work with a 9-tooth starter pinion gear for optimal engagement.
  • Mandatory 9T Pinion: Please ensure you are using a compatible 9-tooth starter pinion gear with this ring gear for correct functionality.
  • High-Quality Construction: Built with robust materials to withstand the stresses of engine starting, ensuring longevity and consistent performance.

Properly matching the starter ring gear and pinion gear is crucial for the longevity and efficiency of your starter system. This Twin Power 66-tooth ring gear, when paired with the correct 9-tooth pinion, offers a reliable solution for maintaining or upgrading your Big Twin's starting capabilities. It's an essential part for riders seeking dependable performance from their Harley-Davidson.

Ensure your starter system is correctly configured for optimal performance. Purchase the Twin Power 66-tooth starter ring gear today!

Vehicle Fitment

Years Make Model Trim
1998-2006 Harley-Davidson FLHR Road King Base
1998-2006 Harley-Davidson FLHRCI Road King Classic Base
2000-2006 Harley-Davidson FLHRI Road King Base
2002 Harley-Davidson FLHRSEI Screamin Eagle Road King Base
1998-2005 Harley-Davidson FLHTC Electra Glide Classic Base
1998-2006 Harley-Davidson FLHTCI Electra Glide Classic Base
1998-2006 Harley-Davidson FLHTCUI Electra Glide Ultra Classic Base
2003-2006 Harley-Davidson FLHTI Electra Glide Standard Base
1998-2006 Harley-Davidson FLSTC Heritage Softail Classic Base
1998-2006 Harley-Davidson FLSTF Fat Boy Base
1998-2006 Harley-Davidson FLSTS Heritage Springer Base
2005-2006 Harley-Davidson FLSTSC Softail Springer Classic Base
1998-2006 Harley-Davidson FLTRI Road Glide Base
1998-2006 Harley-Davidson FXD Dyna Super Glide Base
2006 Harley-Davidson FXDBI Street Bob Base
2005 Harley-Davidson FXDC Super Glide Custom Base
2006 Harley-Davidson FXDI Dyna Super Glide Base
2004-2006 Harley-Davidson FXDLI Dyna Low Rider Base
1998-2000 Harley-Davidson FXDS-Conv Dyna Convertible Base
1998-2006 Harley-Davidson FXDWG Dyna Wide Glide Base
2004-2006 Harley-Davidson FXDWGI Dyna Wide Glide Base
1999 Harley-Davidson FXR2 Base
1999 Harley-Davidson FXR3 Base
2000 Harley-Davidson FXR4 Base
1999-2006 Harley-Davidson FXSTB Night Train Base
1998-1999 Harley-Davidson FXSTC Softail Custom Base
2000-2006 Harley-Davidson FXSTD Softail Deuce Base
1998-2006 Harley-Davidson FXSTS Springer Softail Base

Product Details

Product Description
Part Numbers
Sizing & Fit

About TwinPower

TwinPower engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full TwinPower lineup with fast shipping and expert fitment support — order with confidence.

Twin Power 66-Tooth Starter Ring Gear for Harley-Davidson Big Twin (1998-2006, Except 2006 Dyna)

This 66-tooth starter ring gear from Twin Power is designed for 1998-2006 Harley-Davidson Big Twin models (excluding 2006 Dyna) and requires a 9-tooth pinion gear for proper operation. It's a key component for ensuring your motorcycle's starter system engages effectively and cranks the engine reliably. This gear is manufactured to meet stringent quality standards for durability and performance.

Key Features:

  • Specific Application: Fits 1998-2006 Harley-Davidson Big Twin models, including FLHR, FLHRCI, FLHT, FLHTC, FLHTCI, FLHTCUI, FLSTC, FLSTF, FLSTS, FLTR, FLTRI, FXD, FXDL, FXDS-CONV, FXDWG, FXSTC, and FXSTS.
  • 66 Teeth: This tooth count is specifically designed to work with a 9-tooth starter pinion gear for optimal engagement.
  • Mandatory 9T Pinion: Please ensure you are using a compatible 9-tooth starter pinion gear with this ring gear for correct functionality.
  • High-Quality Construction: Built with robust materials to withstand the stresses of engine starting, ensuring longevity and consistent performance.

Properly matching the starter ring gear and pinion gear is crucial for the longevity and efficiency of your starter system. This Twin Power 66-tooth ring gear, when paired with the correct 9-tooth pinion, offers a reliable solution for maintaining or upgrading your Big Twin's starting capabilities. It's an essential part for riders seeking dependable performance from their Harley-Davidson.

Ensure your starter system is correctly configured for optimal performance. Purchase the Twin Power 66-tooth starter ring gear today!

Vehicle Fitment

Years Make Model Trim
1998-2006 Harley-Davidson FLHR Road King Base
1998-2006 Harley-Davidson FLHRCI Road King Classic Base
2000-2006 Harley-Davidson FLHRI Road King Base
2002 Harley-Davidson FLHRSEI Screamin Eagle Road King Base
1998-2005 Harley-Davidson FLHTC Electra Glide Classic Base
1998-2006 Harley-Davidson FLHTCI Electra Glide Classic Base
1998-2006 Harley-Davidson FLHTCUI Electra Glide Ultra Classic Base
2003-2006 Harley-Davidson FLHTI Electra Glide Standard Base
1998-2006 Harley-Davidson FLSTC Heritage Softail Classic Base
1998-2006 Harley-Davidson FLSTF Fat Boy Base
1998-2006 Harley-Davidson FLSTS Heritage Springer Base
2005-2006 Harley-Davidson FLSTSC Softail Springer Classic Base
1998-2006 Harley-Davidson FLTRI Road Glide Base
1998-2006 Harley-Davidson FXD Dyna Super Glide Base
2006 Harley-Davidson FXDBI Street Bob Base
2005 Harley-Davidson FXDC Super Glide Custom Base
2006 Harley-Davidson FXDI Dyna Super Glide Base
2004-2006 Harley-Davidson FXDLI Dyna Low Rider Base
1998-2000 Harley-Davidson FXDS-Conv Dyna Convertible Base
1998-2006 Harley-Davidson FXDWG Dyna Wide Glide Base
2004-2006 Harley-Davidson FXDWGI Dyna Wide Glide Base
1999 Harley-Davidson FXR2 Base
1999 Harley-Davidson FXR3 Base
2000 Harley-Davidson FXR4 Base
1999-2006 Harley-Davidson FXSTB Night Train Base
1998-1999 Harley-Davidson FXSTC Softail Custom Base
2000-2006 Harley-Davidson FXSTD Softail Deuce Base
1998-2006 Harley-Davidson FXSTS Springer Softail Base

Product Details

Product Description

About TwinPower

TwinPower engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full TwinPower lineup with fast shipping and expert fitment support — order with confidence.

Twin Power 66-Tooth Starter Ring Gear for Harley-Davidson Big Twin (1998-2006, Except 2006 Dyna)

This 66-tooth starter ring gear from Twin Power is designed for 1998-2006 Harley-Davidson Big Twin models (excluding 2006 Dyna) and requires a 9-tooth pinion gear for proper operation. It's a key component for ensuring your motorcycle's starter system engages effectively and cranks the engine reliably. This gear is manufactured to meet stringent quality standards for durability and performance.

Key Features:

  • Specific Application: Fits 1998-2006 Harley-Davidson Big Twin models, including FLHR, FLHRCI, FLHT, FLHTC, FLHTCI, FLHTCUI, FLSTC, FLSTF, FLSTS, FLTR, FLTRI, FXD, FXDL, FXDS-CONV, FXDWG, FXSTC, and FXSTS.
  • 66 Teeth: This tooth count is specifically designed to work with a 9-tooth starter pinion gear for optimal engagement.
  • Mandatory 9T Pinion: Please ensure you are using a compatible 9-tooth starter pinion gear with this ring gear for correct functionality.
  • High-Quality Construction: Built with robust materials to withstand the stresses of engine starting, ensuring longevity and consistent performance.

Properly matching the starter ring gear and pinion gear is crucial for the longevity and efficiency of your starter system. This Twin Power 66-tooth ring gear, when paired with the correct 9-tooth pinion, offers a reliable solution for maintaining or upgrading your Big Twin's starting capabilities. It's an essential part for riders seeking dependable performance from their Harley-Davidson.

Ensure your starter system is correctly configured for optimal performance. Purchase the Twin Power 66-tooth starter ring gear today!

Vehicle Fitment

Years Make Model Trim
1998-2006 Harley-Davidson FLHR Road King Base
1998-2006 Harley-Davidson FLHRCI Road King Classic Base
2000-2006 Harley-Davidson FLHRI Road King Base
2002 Harley-Davidson FLHRSEI Screamin Eagle Road King Base
1998-2005 Harley-Davidson FLHTC Electra Glide Classic Base
1998-2006 Harley-Davidson FLHTCI Electra Glide Classic Base
1998-2006 Harley-Davidson FLHTCUI Electra Glide Ultra Classic Base
2003-2006 Harley-Davidson FLHTI Electra Glide Standard Base
1998-2006 Harley-Davidson FLSTC Heritage Softail Classic Base
1998-2006 Harley-Davidson FLSTF Fat Boy Base
1998-2006 Harley-Davidson FLSTS Heritage Springer Base
2005-2006 Harley-Davidson FLSTSC Softail Springer Classic Base
1998-2006 Harley-Davidson FLTRI Road Glide Base
1998-2006 Harley-Davidson FXD Dyna Super Glide Base
2006 Harley-Davidson FXDBI Street Bob Base
2005 Harley-Davidson FXDC Super Glide Custom Base
2006 Harley-Davidson FXDI Dyna Super Glide Base
2004-2006 Harley-Davidson FXDLI Dyna Low Rider Base
1998-2000 Harley-Davidson FXDS-Conv Dyna Convertible Base
1998-2006 Harley-Davidson FXDWG Dyna Wide Glide Base
2004-2006 Harley-Davidson FXDWGI Dyna Wide Glide Base
1999 Harley-Davidson FXR2 Base
1999 Harley-Davidson FXR3 Base
2000 Harley-Davidson FXR4 Base
1999-2006 Harley-Davidson FXSTB Night Train Base
1998-1999 Harley-Davidson FXSTC Softail Custom Base
2000-2006 Harley-Davidson FXSTD Softail Deuce Base
1998-2006 Harley-Davidson FXSTS Springer Softail Base

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