PROTORQUE – AmericanV-twin.com

Protorque 1.4 Kw High Torque Starter For Harley Big Twin 1994-2006

admin — Tue, 23 Dec 2025 11:42:43 +0000

Protorque 1.4 Kw High Torque Starter For Harley Big Twin 1994-2006

Protorque 1.4 kW: High-Torque Cranking Power for 1994–2006 Big Twins

The Protorque 1.4 kW High-Torque Starter is the definitive solution for Harley-Davidson riders who demand more reliability than the stock electrical system can provide. As Evolution and Twin Cam engines are modified with high-lift cams and big-bore kits, the factory starter often becomes the weak link. This 1.4 kilowatt unit delivers roughly 20% more torque than the original equipment, providing the mechanical muscle needed to spin over high-compression V-Twins even under extreme heat.

Reinforced “Life-Time” Starter Clutch

One of the most frequent failure points in V-Twin starters is the clutch mechanism spinning out or failing to engage. The Protorque assembly features a heavy-duty, oversized starter clutch designed to withstand the violent kick-back often associated with high-displacement engines. By utilizing reinforced rollers and high-tension springs, this starter ensures positive engagement with the ring gear every time you hit the button, eliminating the frustrating “whirring” sound of a failed unit.

Advanced Gear Reduction and Efficiency

The Protorque 1.4 kW motor utilizes precision gear reduction technology to multiply rotational force while maintaining a low amperage draw. This efficiency is critical because it leaves more battery energy available for your ignition system to produce a hotter spark during the cranking cycle. The result is an engine that reaches its firing RPM faster, leading to quicker starts and less wear on your battery and charging system.

Professional-Grade Construction

Every Protorque starter is built to professional standards. The armature hairpins are resistance-fused to the commutator rather than soldered, ensuring the electrical connections remain stable even when the motor is subjected to the high heat of a summer traffic jam. Each unit is fully dyno-tested before leaving the factory and includes a performance test curve sheet, guaranteeing that your starter meets its advertised 1.4 kilowatt power rating out of the box.

Fitment and Compatibility (1994–2006)

This high-torque starter (Replaces OEM #31552-89A, 31553-90, 31553-94) is a direct bolt-on for:

Harley-Davidson Softail (1994–2006): All Evolution and Twin Cam models.
Harley-Davidson Touring (1994–2006): Road King, Electra Glide, and Road Glide.
Harley-Davidson Dyna (1994–2005): All models (Does NOT fit 2006 Dyna).
Finish Options: Available in high-quality Chrome or stealthy Black to match your engine cases.

Protorque 1.4 Kw High Torque Starter For Harley
Features:

12 Volt
1.4kw High Torque Starter
Jackshaft with Small Hole 10-32 Thread
Will Replace Older 1.2kw Versions
Guaranteed to Meet or Exceed OEM Performance
Unit Contains Protorque “”Life-Time”” High Performance Clutch with Special Metals, Hardened Cam, Sealed Bearings, High-Temperature Springs, Oversize Rollers, and Factory Pre-Lubing
Replaces OEM 31553-94 A B

Product Style	AmericanV-twin Item #	Catalog Number	Store Sku	MFR. Product #	Availability
Black	18140	803-645	14394	PH125-HD04-B	In Stock: Ships within 24 hours
Chrome	18139	803-646		PH125-HD04-C	In Stock: Ships within 24 hours
Natural	18141	803-644		PH125-HD04	Out of Stock

This Product Fits

Harley Davidson
Dyna Convertible FXDS 1994-2000
Dyna Low Rider FXDL/I 1994-2005
Dyna Super Glide Custom FXDC/I 2005
Dyna Super Glide FXD/I 1995-2005
Dyna Super Glide Sport FXDX 1999-2005
Dyna Super Glide Sport Touring FXDXT 2001, 2002, 2003
Dyna Wide Glide CVO/SE FXDWG2 2001
Dyna Wide Glide CVO/SE FXDWG3 2002
Dyna Wide Glide FXDWG/I 1994-2005
Electra Glide Classic FLHTC/I 1994-2006
Electra Glide CVO/SE FLHTCSE 2004
Electra Glide CVO/SE FLHTCSE2 2005
Electra Glide Standard FLHT/I 1994-2006
Electra Glide Ultra Classic FLHTCU/I 1994-2006
FXR2 CVO/SE 1999
FXR3 CVO/SE 1999
FXR4 CVO/SE 2000
Low Rider Custom FXLR 1994
Road Glide CVO/SE FLTRSEI2 2001
Road Glide FLTR/I 1998-2006
Road Glide SE FLTRSEI 2000
Road King Classic FLHRC/I 1998-2006
Road King Custom FLHRS/I 2004, 2005, 2006
Road King CVO/SE FLHRSEI 2002
Road King CVO/SE FLHRSEI2 2003
Road King FLHR/I 1994-2006
Softail Bad Boy Springer FXSTSB 1995, 1996, 1997
Softail Custom FXSTC/I 1994-1999
Softail Deluxe FLSTN/I 2005, 2006
Softail Deuce CVO/SE FXSTDSE 2003
Softail Deuce CVO/SE FXSTDSE2 2004
Softail Deuce FXSTD/I 1999-2006
Softail Fat Boy CVO/SE FLSTFSE 2005
Softail Fat Boy CVO/SE FLSTFSE2 2006
Softail Fat Boy FLSTF/I 1994-2006
Softail Heritage Classic FLSTC/I 1994-2006
Softail Heritage FLST/I 2006
Softail Heritage Springer FLSTS/I 1997-2003
Softail Night Train FXSTB/I 1999-2006
Softail Special FLSTN/I 1994, 1995, 1996
Softail Springer Classic FLSTSC/I 2005, 2006
Softail Springer FXSTS/I 1994-2006
Softail Standard FXST/I 1999-2006
Street Glide FLHX/I 2006
Super Glide FXR 1994
Tour Glide Ultra Classic FLTCU/I 1994, 1995, 1996
Ultra Classic Electra Glide CVO/SE FLHTCUSE 2006

Protorque 1.4 Kw High Torque Starter For Harley Sportster / Buell 1981-2022

admin — Tue, 23 Dec 2025 11:07:48 +0000

Protorque 1.4 Kw High Torque Starter For Harley Sportster / Buell 1981-2022

Protorque 1.4 kW: High-Torque Starting Power for Sportsters and Buells

The Protorque 1.4 kW High-Torque Starter is engineered for the Harley-Davidson Sportster enthusiast who demands more reliability than the factory unit can offer. Whether you are running a high-compression 1250cc big-bore kit or a stock 883cc engine that struggles during hot restarts, this 1.4 kilowatt powerhouse provides the mechanical muscle to get your V-Twin spinning. It is a direct-fit solution that brings modern electrical efficiency to a wide range of Sportster and Buell applications.

Superior Cranking Torque for Evolution and Ironhead Engines

Factory starters are often the “weak link” in a Sportster’s electrical system, especially when heat-soak occurs. The Protorque unit utilizes an advanced gear reduction system to multiply rotational force, delivering up to 50% more torque than stock. This allows the motor to overcome the resistance of high-lift cams and increased cylinder pressure, ensuring that your engine reaches the required firing RPM faster while putting less strain on your battery.

Heavy-Duty “Life-Time” Starter Clutch

One of the primary causes of starter failure in V-Twins is the starter clutch “spinning out.” Protorque addresses this with a reinforced starter clutch featuring oversized rollers and high-tension springs. This ensures positive engagement with the ring gear every time you hit the start button, eliminating the metallic “clunk” or “whirring” associated with a failing OEM clutch.

Built for Extreme Reliability

Every Protorque starter is constructed with industrial-grade internal components, including sealed ball bearings and heavy-duty armatures that are resistance-fused to the commutator. This high-heat construction prevents the electrical connections from melting during difficult starts. Each unit is fully dyno-tested to ensure it meets its power rating and includes a performance test curve sheet as a guarantee of quality.

Fitment and Compatibility (1981–2022)

This versatile starter is designed as a direct replacement for:

Harley-Davidson Sportster (1981–2022): All XL, XLH, 883, 1100, and 1200 models (Ironhead and Evolution).
Buell Models (1987–2010): All air-cooled V-Twin models (S1, S2, S3, M2, X1, and XB series).
OEM Replacement: Replaces Harley-Davidson part numbers 31390-86, 31390-91, and 31391-91.
Finish Options: Available in high-luster Chrome or stealthy Black to match your engine case.

Protorque 1.4 Kw High Torque Starter For Harley
Features:

12 Volt
1.4kw High Torque Starter
Will Replace Older 1.0kw & 1.2kw Versions
Guaranteed to Meet or Exceed OEM Performance
Unit Contains High Performance Clutch with Oversize Rollers
Replaces OEM 31390-86 / 31390-91 / 31391-91 / 31391-91 / 31514-90 / 31533-81

Product Style	AmericanV-twin Item #	Catalog Number	Store Sku	MFR. Product #	Availability
Black	218135	803-642	14392	PH125-HD02-B	In Stock: Ships within 24 hours
Chrome	218134	803-643	14391	PH125-HD02-C	In Stock: Ships within 24 hours

This Product Fits

Buell
Blast 2000-2010
M2 Cyclone 1997-2002
M2L Cyclone 2002
S1 Lightning 1994-2002
S1 White Lightning 1997, 1998
S2 Thunderbolt 1994, 1995, 1996
S2T Thunderbolt 1994-2002
S3 Thunderbolt 1997, 1998, 1999, 2000, 2001
S3T Thunderbolt 1997-2002
X1 Lightning 1999, 2000, 2001, 2002
XB12R Firebolt 2004-2010
XB12Scg Lightning 2005, 2006, 2007, 2008, 2009
XB12S Lightning 2004, 2005, 2006, 2007, 2008
XB12Ss Lightning 2007, 2008, 2009, 2010
XB12STT Lightning 2007, 2008
XB12XP Ulysses Police 2009
XB12XT Ulysses 2008, 2009, 2010
XB12X Ulysses 2005-2010
XB9R Firebolt 2002-2007
XB9SL 2003, 2004
XB9S Lightning 2003, 2004
XB9SX Lightning 2005-2010

Harley Davidson
Sportster Custom XL1200C 1996-2019
Sportster Custom XL883C 1998-2009
Sportster Deluxe XLH883DLX 1989, 1990, 1991, 1992
Sportster Forty-Eight Special XL1200XS 2018, 2019
Sportster Forty-Eight XL1200X 2010-2022
Sportster Hugger XLH883HUG 1988-2003
Sportster Iron XL1200NS 2018, 2019, 2020, 2021
Sportster Iron XL883N 2009-2022
Sportster Low/SuperLow XL883L 2005-2019
Sportster Low XL1200L 2006-2011
Sportster Nightster XL1200N 2007-2012
Sportster Roadster XL1200CX 2016, 2017, 2018, 2019, 2020
Sportster Roadster XL1200R 2004, 2005, 2006, 2007, 2008
Sportster Roadster XL883R 2002-2012
Sportster Seventy-Two XL1200V 2012, 2013, 2014, 2015, 2016
Sportster Sport XL1200S 1996-2003
Sportster SuperLow XL1200T 2014, 2015, 2016, 2017
Sportster XL883 2004-2009
Sportster XLH1100 1986, 1987
Sportster XLH1200 1988-2003
Sportster XLH883 1986-2003
XL 1981, 1982, 1983, 1984
XLH1000 1981, 1982, 1983, 1984, 1985
XLS Roadster 1981, 1982, 1983, 1984, 1985
XLX-61 1983, 1984, 1985
XR1000 1983, 1984, 1985
XR1200/XR1200X 2008, 2009, 2010, 2011, 2012

Protorque 1.4 Kw High Torque Starter For Harley Twin Cam 2006-2017

admin — Mon, 22 Dec 2025 20:27:40 +0000

Protorque 1.4 Kw High Torque Starter For Harley Twin Cam 2006-2017

Protorque 1.4 kW: High-Torque Starting Power for Late-Model Twin Cams

The Protorque 1.4 kW High-Torque Starter is a premium electrical upgrade for Harley-Davidson Twin Cam motorcycles from 2006 to 2017. As these engines age or receive performance modifications like high-lift cams and big-bore kits, the factory starter can often struggle, leading to “kick-back” or total starter failure. Protorque addresses these issues with a 1.4 kilowatt motor that delivers significantly more cranking torque than stock, ensuring your V-Twin roars to life instantly, even when the engine is hot.

Engineered for Performance and Durability

This is not just a standard replacement; it is an optimized starting solution. The Protorque unit features a “Life-Time” high-performance clutch equipped with oversized rollers and high-temperature springs to prevent the common “spinning” failure seen in lesser units. The internal components are housed in a rugged casing with sealed bearings and a hardened cam, providing a level of reliability that meets or exceeds original equipment specifications.

Precision 10-Tooth Pinion Engagement

To ensure smooth and consistent power transfer to your primary drive, this starter utilizes a 10-tooth pinion gear. This design provides a more robust mesh with the ring gear, reducing the risk of chipped teeth or mechanical grinding during high-compression starts. Whether you are running a stock 96ci, 103ci, or a modified 110ci engine, the Protorque 1.4 kW provides the mechanical advantage needed to overcome high-resistance cranking.

Direct Bolt-On Installation

The Protorque starter is designed as a true plug-and-play replacement. It utilizes the factory mounting points and electrical connections, making installation straightforward for most home mechanics. Every unit is fully dyno-tested before leaving the factory and includes a printed performance test curve sheet, guaranteeing that the starter meets its advertised 1.4 kW power rating.

Fitment and Compatibility (2006–2017)

This starter (Replaces OEM #31618-06A and 31619-06A) is compatible with:

Harley Dyna (2006–2017): All models (Street Bob, Low Rider, Wide Glide, Fat Bob).
Harley Softail (2007–2017): All models (Heritage, Fat Boy, Deluxe, Slim, Breakout).
Harley Touring (2007–2016): Road King, Street Glide, Electra Glide, and Road Glide.
Finish Options: Available in high-luster Chrome or stealthy Black to match your engine’s aesthetic.

Protorque 1.4 Kw High Torque Starter For Harley
Features:

12 Volt
1.4 kw High Torque Starter
CW Rotation with 10 Tooth Pinion
Guaranteed to Meet or Exceed OEM Performance
Unit Contains Protorque “Life-Time” High Performance Clutch with Special Metals, Hardened Cam, Sealed Bearings, High-Temperature Springs, Oversize Rollers, and Factory Pre-Lubing
Replaces OEM 31618-06 A / 31619-06 A

Product Style	AmericanV-twin Item #	Catalog Number	Store Sku	MFR. Product #	Availability
Black	18133	833-919		PH125-HD08-B	In Stock: Ships within 24 hours
Chrome	18132	833-920	14395	PH125-HD08-C	In Stock: Ships within 24 hours

This Product Fits

Harley Davidson
Dyna Fat Bob CVO/SE FXDFSE 2009, 2010
Dyna Fat Bob FXDF 2008-2017
Dyna Low Rider FXDL/I 2006-2017
Dyna Low Rider S FXDLS 2016, 2017
Dyna Street Bob FXDB/I 2006-2017
Dyna Super Glide Custom FXDC/I 2006-2014
Dyna Super Glide CVO/SE FXDSE 2007
Dyna Super Glide CVO/SE FXDSE2 2008
Dyna Super Glide FXD/I 2006, 2007, 2008, 2009, 2010
Dyna Switchback FLD 2012, 2013, 2014, 2015, 2016
Dyna Wide Glide FXDWG/I 2006-2017
Electra Glide Classic FLHTC/I 2007-2013
Electra Glide Standard FLHT/I 2007, 2008, 2009
Electra Glide Ultra Classic FLHTCU/I 2007-2016
Electra Glide Ultra Classic Low FLHTCUL 2015, 2016
Electra Glide Ultra Limited CVO/SE FLHTKSE 2014, 2015, 2016
Electra Glide Ultra Limited FLHTK 2010-2016
Electra Glide Ultra Limited Low FLHTKL 2015, 2016
Freewheeler FLRT 2015, 2016
Road Glide Custom FLTRX 2010, 2011, 2012, 2013
Road Glide CVO/SE FLTRSE3 2009
Road Glide CVO/SE FLTRXSE 2012, 2013
Road Glide FLTR/I 2007, 2008, 2009
Road Glide FLTRX 2015, 2016
Road Glide Special FLTRXS 2015, 2016
Road Glide Ultra CVO/SE FLTRUSE 2011, 2015, 2016
Road Glide Ultra FLTRU 2011, 2012, 2013, 2016
Road King Classic FLHRC/I 2007-2013
Road King Custom FLHRS/I 2007
Road King CVO/SE FLHRSE3 2007
Road King CVO/SE FLHRSE4 2008
Road King CVO/SE FLHRSE5 2013
Road King CVO/SE FLHRSE6 2014
Road King FLHR/I 2007-2016
Softail Blackline FXS 2011, 2012, 2013
Softail Breakout CVO/SE FXSBSE 2013, 2014
Softail Breakout FXSB 2013, 2014, 2015, 2016, 2017
Softail Convertible CVO/SE FLSTSE 2010
Softail Convertible CVO/SE FLSTSE2 2011
Softail Convertible CVO/SE FLSTSE3 2012
Softail Cross Bones Springer FLSTSB 2008, 2009, 2010, 2011
Softail Custom FXSTC/I 2007, 2008, 2009, 2010
Softail Deluxe CVO/SE FLSTNSE 2014, 2015
Softail Deluxe FLSTN/I 2007-2017
Softail Deuce FXSTD/I 2007
Softail Fat Boy FLSTF/I 2007-2017
Softail Fat Boy Lo FLSTFB 2010-2016
Softail Fat Boy S FLSTFBS 2016, 2017
Softail Heritage Classic FLSTC/I 2007-2017
Softail Night Train FXSTB/I 2007, 2008, 2009
Softail Pro Street Breakout CVO/SE FXSE 2016, 2017
Softail Rocker C FXCWC 2007, 2008, 2009, 2010, 2011
Softail Rocker FXCW 2008, 2009, 2010, 2011
Softail Slim FLS 2012-2017
Softail Slim S FLSS 2016, 2017
Softail Springer Classic FLSTSC/I 2007
Softail Springer CVO/SE FXSTSSE 2007
Softail Springer CVO/SE FXSTSSE2 2008
Softail Springer CVO/SE FXSTSSE3 2009
Softail Standard FXST/I 2007-2012
Street Glide CVO/SE FLHXSE 2010, 2015, 2016
Street Glide CVO/SE FLHXSE2 2011
Street Glide CVO/SE FLHXSE3 2012
Street Glide FLHX/I 2010-2016
Street Glide Special FLHXS 2014, 2015, 2016
Street Glide Trike FLHXXX 2010, 2011
Tri Glide Ultra Classic FLHTCUTG 2009-2016
Ultra Classic Electra Glide CVO/SE FLHTCUSE2 2007
Ultra Classic Electra Glide CVO/SE FLHTCUSE3 2008
Ultra Classic Electra Glide CVO/SE FLHTCUSE4 2009
Ultra Classic Electra Glide CVO/SE FLHTCUSE5 2010
Ultra Classic Electra Glide CVO/SE FLHTCUSE6 2011
Ultra Classic Electra Glide CVO/SE FLHTCUSE7 2012
Ultra Classic Electra Glide CVO/SE FLHTCUSE8 2013

Protorque Hitachi Style Starter For Harley 1974-1988

admin — Mon, 22 Dec 2025 20:02:00 +0000

Protorque Hitachi Style Starter For Harley 1974-1988

Protorque Hitachi Style Starter: High-Torque Power for Classic V-Twins

The Protorque Hitachi Style High-Torque Starter is the definitive electrical upgrade for vintage Harley-Davidson riders. Designed to replace the aging and often underpowered factory units used between 1974 and 1988, this starter brings modern 1.4 kW power to the Shovelhead and early Evolution platforms. If your bike struggles to turn over when hot or stalls against high-compression pistons, this Protorque unit provides the mechanical muscle needed for crisp, reliable starts every time.

Powerful 1.4 kW Performance

Most original Hitachi starters featured a modest 0.8 kW output, which can struggle with performance cams or big-bore kits. The Protorque assembly boasts a 1.4 kW motor, delivering up to 50% more cranking torque and higher shaft speeds. This ensures that your engine reaches the required RPM for ignition faster, putting less strain on your battery and reducing the wear on your starter drive and ring gear.

Heavy-Duty Internal Construction

Engineered for longevity, the Protorque Hitachi-style starter is manufactured using heavy-duty armature commutators and oversized bearings. It features high-quality needle bearings in the end caps to reduce friction and heat buildup during long cranking cycles. Unlike cheap reproductions, these units are individually tested to ensure they meet or exceed OEM performance standards before they leave the factory.

Authentic Fitment and Design

This starter is specifically designed for models originally equipped with a Hitachi-brand starter (easily identified by its 5-1/4″ body length). It is a direct “plug-and-play” replacement for OEM Part Number 31570-73. Housed in a compact 80mm diameter casing, it maintains the classic “short model” look of your vintage Harley while hiding a modern, high-output motor inside.

Fitment and Compatibility (1974–1988)

The Protorque Hitachi Style Starter is designed for the following applications:

Harley Big Twin FX Series (1974–1986): Super Glide, Low Rider, Wide Glide.
Harley Big Twin FL Series (1982–1984): Electra Glide models.
Harley Touring & FXR (1984–1988): FLT and early Evolution FXR models.
Harley Sportster XL (1974–Early 1976): Ironhead models equipped with Hitachi starters.
Note: Not interchangeable with the 6″ long Prestolite-style starters. Uses 10-24 mounting bolts.

Protorque Hitachi Style Starter For Harley
Features:

12 Volt Hitachi Style High Torque Starter
Guaranteed to Meet or Exceed OEM Performance
Unit Contains Heavy Duty Armature and Oversized Bearings
Replaces OEM 31570-73 T

Note: For models originally equipped with a Hitachi Starter, identified by 5 1/4″ length as opposed to the 6″ Prestolite starter.

Product Style	AmericanV-twin Item #	Catalog Number	Store Sku	MFR. Product #	Availability
Black	18142	803-652	4397	PH125-HD10-B	In Stock: Ships within 24 hours
Chrome	18143	803-653	4398	PH125-HD10-C	Only 6 Left: Ships within 24 hours

This Product Fits

Harley Davidson
Electra Glide Classic FLHC 1981, 1982
Electra Glide Classic FLHTC/I 1983-1988
Electra Glide Special FLHX 1984
Electra Glide Sport FLHS 1981-1988
Electra Glide Standard FLHT/I 1983-1988
Low Glide/Low Rider FXRS 1982
Low Rider Belt FXSB 1982
Low Rider FXS 1977, 1978, 1981, 1982
Softail Custom FXSTC/I 1986-1992
Softail Heritage Classic FLSTC/I 1987, 1988
Softail Heritage FLST/I 1987, 1988
Softail Springer FXSTS/I 1988
Softail Standard FXST/I 1984, 1985, 1986, 1987, 1988
Sturgis FXB 1980, 1981, 1982
Super Glide FX 1974-1979
Super Glide FXE 1974-1985
Super Glide FXR 1986, 1987, 1988
Super Glide II FXR 1982, 1983
Tour Glide Classic FLTC/I 1983-1988
Tour Glide FLT 1984, 1985, 1986
Wide Glide FXWG 1980-1986
XLH1000 1974, 1975, 1976