TwinPower TWP498259 08-17 FXST FLST 40 Amp Black Voltage Regulator

Our high-quality replacement regulators keep you charging. They come with a one-year manufacturer's warranty.

• Direct fit electronic regulators offered in black or chrome finishes for many FL, FX, XL, Dyna, Softail, and Touring models
• Sized by amp rating 15-60 amps to match OEM stator and charging system requirements
• Help prevent overcharging and undercharging, extending battery and component life

The TwinPower TWP498259 voltage regulator is a high-quality replacement regulator designed to help maintain proper charging system performance. This 40-amp electronic regulator features a black finish and replaces H-D 74540-08. It helps prevent overcharging and undercharging, supporting battery and charging-component service life.

Key Features & Performance Benefits

• Direct-Fit Design: Offered for many Harley-Davidson FL, FX, XL, Dyna, Softail, and Touring models.
• 40-Amp Capacity: Sized to match the stated OEM stator and charging-system requirements.
• Electronic Regulation: Helps control charging output and prevent overcharging or undercharging.
• Replacement Application: Replaces H-D 74540-08 and includes a one-year manufacturer's warranty.

Key Product Specifications & Technical Data

• Brand: TwinPower
• Part Number: TWP498259
• Part Type: Powersports voltage regulator
• Regulator Type: Electronic
• Rated Capacity: 40 amps
• Finish: Black
• Replacement Reference: H-D 74540-08
• Warranty: One-year manufacturer's warranty

What's Included in the Box

One TwinPower TWP498259 voltage regulator.

Fitment

Fits 2008 Harley-Davidson FLSTC Heritage Softail Classic, FLSTF Fat Boy, FLSTSB Cross Bones, FXCW Rocker, FXCWC Rocker C, FXSTB Night Train, and FXSTC Softail Custom models; and 2009 Harley-Davidson FLSTC Heritage Softail Classic, FLSTF Fat Boy, and FLSTSB Cross Bones models. The product name indicates an 08-17 FXST and FLST application.

Fitments:
2008 Harley Davidson FLSTC Heritage Softail Classic Base
2008 Harley Davidson FLSTF Fat Boy Base
2008 Harley Davidson FLSTSB Cross Bones Base
2008 Harley Davidson FXCW Rocker Base
2008 Harley Davidson FXCWC Rocker C Base
2008 Harley Davidson FXSTB Night Train Base
2008 Harley Davidson FXSTC Softail Custom Base
2009 Harley Davidson FLSTC Heritage Softail Classic Base
2009 Harley Davidson FLSTF Fat Boy Base
2009 Harley Davidson FLSTSB Cross Bones Base
2009 Harley Davidson FXCW Rocker Base
2009 Harley Davidson FXCWC Rocker C Base
2009 Harley Davidson FXSTB Night Train Base
2009 Harley Davidson FXSTC Softail Custom Base
2009 Harley Davidson FXSTSSE3 CVO Softail Springer Base
2010 Harley Davidson FLSTC Heritage Softail Classic Base
2010 Harley Davidson FLSTF Fat Boy Base
2010 Harley Davidson FLSTFB Fat Boy Lo Base
2010 Harley Davidson FLSTSB Cross Bones Base
2010 Harley Davidson FLSTSE CVO Softail Convertible Base
2010 Harley Davidson FXCWC Rocker C Base
2010 Harley Davidson FXSTC Softail Custom Base
2011 Harley Davidson FLSTC Heritage Softail Classic Base
2011 Harley Davidson FLSTF Fat Boy Base
2011 Harley Davidson FLSTFB Fat Boy Lo Base
2011 Harley Davidson FLSTSB Cross Bones Base
2011 Harley Davidson FXCWC Rocker C Base
2011 Harley Davidson FXS Blackline Base
2012 Harley Davidson FLS Softail Slim Base
2012 Harley Davidson FLSTC Heritage Softail Classic Base
2012 Harley Davidson FLSTF Fat Boy Base
2012 Harley Davidson FLSTFB Fat Boy Lo Base
2012 Harley Davidson FXS Blackline Base
2013 Harley Davidson FLS Softail Slim Base
2013 Harley Davidson FLSTC Heritage Softail Classic Base
2013 Harley Davidson FLSTF Fat Boy Base
2013 Harley Davidson FLSTFB Fat Boy Lo Base
2013 Harley Davidson FXS Blackline Base
2013 Harley Davidson FXSB Breakout Base
2013 Harley Davidson FXSBSE CVO Breakout Base
2014 Harley Davidson FLS Softail Slim Base
2014 Harley Davidson FLSTC Heritage Softail Classic Base
2014 Harley Davidson FLSTF Fat Boy Base
2014 Harley Davidson FLSTFB Fat Boy Lo Base
2014 Harley Davidson FLSTNSE CVO Softail Deluxe Base
2014 Harley Davidson FXSB Breakout Base
2014 Harley Davidson FXSBSE CVO Breakout Base
2015 Harley Davidson FLS Softail Slim Base
2015 Harley Davidson FLSTC Heritage Softail Classic Base
2015 Harley Davidson FLSTF Fat Boy Base
2015 Harley Davidson FLSTFB Fat Boy Lo Base
2015 Harley Davidson FLSTNSE CVO Softail Deluxe Base
2015 Harley Davidson FXSB Breakout Base
2016 Harley Davidson FLS Softail Slim Base
2016 Harley Davidson FLSS Softail Slim S Base
2016 Harley Davidson FLSTC Heritage Softail Classic Base
2016 Harley Davidson FLSTF Fat Boy Base
2016 Harley Davidson FLSTFB Fat Boy Lo Base
2016 Harley Davidson FLSTFBS Fat Boy S Base
2016 Harley Davidson FXSB Breakout Base
2016 Harley Davidson FXSE CVO Pro Street Breakout Base
2017 Harley Davidson FLS Softail Slim Base
2017 Harley Davidson FLSS Softail Slim S Base
2017 Harley Davidson FLSTC Heritage Softail Classic Base
2017 Harley Davidson FLSTF Fat Boy Base
2017 Harley Davidson FLSTFB Fat Boy Lo Base
2017 Harley Davidson FLSTFBS Fat Boy S Base
2017 Harley Davidson FXSB Breakout Base
2017 Harley Davidson FXSE CVO Pro Street Breakout Base

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: powersports
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1