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Twin Power Clutch Hub — Fits 1984-1989 Harley-Davidson Big Twin

Twin Power Clutch Hub — Fits 1984-1989 Harley-Davidson Big Twin
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Twin Power Clutch Hub — Fits 1984-1989 Harley-Davidson Big Twin
TwinPower

Twin Power Clutch Hub — Fits 1984-1989 Harley-Davidson Big Twin

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SKU: TWP489599
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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
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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.

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Twin Power Clutch Hub for Harley-Davidson Big Twins

Ensure smooth and reliable power transfer with the Twin Power Clutch Hub. This high-quality reproduction is designed to replace the Original Equipment Manufacturer (OEM) part number 37740-84A, offering excellent performance and durability for your Harley-Davidson Big Twin motorcycle. Featuring steel splines and aluminum hub construction, this clutch hub is built to withstand the demands of the road.

Key Features:

  • Direct OEM Replacement: Accurately reproduced to match the specifications of the original Harley-Davidson clutch hub.
  • Durable Construction: Combines strong steel splines with a lightweight aluminum hub for longevity and performance.
  • Reliable Power Transfer: Ensures efficient engagement and disengagement of the clutch for a smooth riding experience.
  • Wide Application: Fits a broad range of 1984-1989 Harley-Davidson Big Twin models.

Vehicle Fitment:

  • 1984-1989 Harley-Davidson FLHS Electra Glide Sport
  • 1984-1989 Harley-Davidson FLHTC Electra Glide Classic
  • 1989 Harley-Davidson FLHTCU Electra Glide Ultra Classic
  • 1986-1989 Harley-Davidson FLST Heritage Softail
  • 1988-1989 Harley-Davidson FLSTC Heritage Softail Classic
  • 1987-1989 Harley-Davidson FXLR Low Rider Custom
  • 1984-1989 Harley-Davidson FXR Super Glide II
  • 1985-1987 Harley-Davidson FXRC Low Rider Chrome
  • 1986 Harley-Davidson FXRD Sport Glide Grand Touring
  • 1984 Harley-Davidson FXRDG Disc Glide
  • 1985-1989 Harley-Davidson FXRPF Police
  • 1984-1989 Harley-Davidson FXRS Low Glide
  • 1984-1989 Harley-Davidson FXRT Sport Glide
  • 1984-1989 Harley-Davidson FXST Softail Standard
  • 1986-1989 Harley-Davidson FXSTC Softail Custom
  • 1984-1989 Harley-Davidson FXWG Wide Glide

Upgrade your drivetrain with confidence. Choose the Twin Power Clutch Hub for your Harley-Davidson from GGCRACING!

Vehicle Fitment

Years Make Model Trim
1984 Harley-Davidson FLHS Electra Glide Sport Base
1987-1989 Harley-Davidson FLHS Electra Glide Sport Base
1984-1989 Harley-Davidson FLHTC Electra Glide Classic Base
1989 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
1988-1989 Harley-Davidson FLSTC Heritage Softail Classic Base
1987-1989 Harley-Davidson FXLR Low Rider Custom Base
1984-1989 Harley-Davidson FXR Super Glide II Base
1985-1987 Harley-Davidson FXRC Low Rider Chrome Base
1984 Harley-Davidson FXRDG Disc Glide Base
1985-1989 Harley-Davidson FXRPF Police Base
1984-1989 Harley-Davidson FXRS Low Glide Base
1984-1989 Harley-Davidson FXRT Sport Glide Base
1984-1989 Harley-Davidson FXST Softail Standard Base
1984-1986 Harley-Davidson FXWG Wide Glide 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.

Watch in action

Twin Power Clutch Hub for Harley-Davidson Big Twins

Ensure smooth and reliable power transfer with the Twin Power Clutch Hub. This high-quality reproduction is designed to replace the Original Equipment Manufacturer (OEM) part number 37740-84A, offering excellent performance and durability for your Harley-Davidson Big Twin motorcycle. Featuring steel splines and aluminum hub construction, this clutch hub is built to withstand the demands of the road.

Key Features:

  • Direct OEM Replacement: Accurately reproduced to match the specifications of the original Harley-Davidson clutch hub.
  • Durable Construction: Combines strong steel splines with a lightweight aluminum hub for longevity and performance.
  • Reliable Power Transfer: Ensures efficient engagement and disengagement of the clutch for a smooth riding experience.
  • Wide Application: Fits a broad range of 1984-1989 Harley-Davidson Big Twin models.

Vehicle Fitment:

  • 1984-1989 Harley-Davidson FLHS Electra Glide Sport
  • 1984-1989 Harley-Davidson FLHTC Electra Glide Classic
  • 1989 Harley-Davidson FLHTCU Electra Glide Ultra Classic
  • 1986-1989 Harley-Davidson FLST Heritage Softail
  • 1988-1989 Harley-Davidson FLSTC Heritage Softail Classic
  • 1987-1989 Harley-Davidson FXLR Low Rider Custom
  • 1984-1989 Harley-Davidson FXR Super Glide II
  • 1985-1987 Harley-Davidson FXRC Low Rider Chrome
  • 1986 Harley-Davidson FXRD Sport Glide Grand Touring
  • 1984 Harley-Davidson FXRDG Disc Glide
  • 1985-1989 Harley-Davidson FXRPF Police
  • 1984-1989 Harley-Davidson FXRS Low Glide
  • 1984-1989 Harley-Davidson FXRT Sport Glide
  • 1984-1989 Harley-Davidson FXST Softail Standard
  • 1986-1989 Harley-Davidson FXSTC Softail Custom
  • 1984-1989 Harley-Davidson FXWG Wide Glide

Upgrade your drivetrain with confidence. Choose the Twin Power Clutch Hub for your Harley-Davidson from GGCRACING!

Vehicle Fitment

Years Make Model Trim
1984 Harley-Davidson FLHS Electra Glide Sport Base
1987-1989 Harley-Davidson FLHS Electra Glide Sport Base
1984-1989 Harley-Davidson FLHTC Electra Glide Classic Base
1989 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
1988-1989 Harley-Davidson FLSTC Heritage Softail Classic Base
1987-1989 Harley-Davidson FXLR Low Rider Custom Base
1984-1989 Harley-Davidson FXR Super Glide II Base
1985-1987 Harley-Davidson FXRC Low Rider Chrome Base
1984 Harley-Davidson FXRDG Disc Glide Base
1985-1989 Harley-Davidson FXRPF Police Base
1984-1989 Harley-Davidson FXRS Low Glide Base
1984-1989 Harley-Davidson FXRT Sport Glide Base
1984-1989 Harley-Davidson FXST Softail Standard Base
1984-1986 Harley-Davidson FXWG Wide Glide 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.

Watch in action

Twin Power Clutch Hub for Harley-Davidson Big Twins

Ensure smooth and reliable power transfer with the Twin Power Clutch Hub. This high-quality reproduction is designed to replace the Original Equipment Manufacturer (OEM) part number 37740-84A, offering excellent performance and durability for your Harley-Davidson Big Twin motorcycle. Featuring steel splines and aluminum hub construction, this clutch hub is built to withstand the demands of the road.

Key Features:

  • Direct OEM Replacement: Accurately reproduced to match the specifications of the original Harley-Davidson clutch hub.
  • Durable Construction: Combines strong steel splines with a lightweight aluminum hub for longevity and performance.
  • Reliable Power Transfer: Ensures efficient engagement and disengagement of the clutch for a smooth riding experience.
  • Wide Application: Fits a broad range of 1984-1989 Harley-Davidson Big Twin models.

Vehicle Fitment:

  • 1984-1989 Harley-Davidson FLHS Electra Glide Sport
  • 1984-1989 Harley-Davidson FLHTC Electra Glide Classic
  • 1989 Harley-Davidson FLHTCU Electra Glide Ultra Classic
  • 1986-1989 Harley-Davidson FLST Heritage Softail
  • 1988-1989 Harley-Davidson FLSTC Heritage Softail Classic
  • 1987-1989 Harley-Davidson FXLR Low Rider Custom
  • 1984-1989 Harley-Davidson FXR Super Glide II
  • 1985-1987 Harley-Davidson FXRC Low Rider Chrome
  • 1986 Harley-Davidson FXRD Sport Glide Grand Touring
  • 1984 Harley-Davidson FXRDG Disc Glide
  • 1985-1989 Harley-Davidson FXRPF Police
  • 1984-1989 Harley-Davidson FXRS Low Glide
  • 1984-1989 Harley-Davidson FXRT Sport Glide
  • 1984-1989 Harley-Davidson FXST Softail Standard
  • 1986-1989 Harley-Davidson FXSTC Softail Custom
  • 1984-1989 Harley-Davidson FXWG Wide Glide

Upgrade your drivetrain with confidence. Choose the Twin Power Clutch Hub for your Harley-Davidson from GGCRACING!

Vehicle Fitment

Years Make Model Trim
1984 Harley-Davidson FLHS Electra Glide Sport Base
1987-1989 Harley-Davidson FLHS Electra Glide Sport Base
1984-1989 Harley-Davidson FLHTC Electra Glide Classic Base
1989 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
1988-1989 Harley-Davidson FLSTC Heritage Softail Classic Base
1987-1989 Harley-Davidson FXLR Low Rider Custom Base
1984-1989 Harley-Davidson FXR Super Glide II Base
1985-1987 Harley-Davidson FXRC Low Rider Chrome Base
1984 Harley-Davidson FXRDG Disc Glide Base
1985-1989 Harley-Davidson FXRPF Police Base
1984-1989 Harley-Davidson FXRS Low Glide Base
1984-1989 Harley-Davidson FXRT Sport Glide Base
1984-1989 Harley-Davidson FXST Softail Standard Base
1984-1986 Harley-Davidson FXWG Wide Glide Base

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