12V 10 Tooth Prestolite Type Starter Compatible With Harley Davidson Fl Flh Fxr Fxrs Super Glide

HARLEY DAVIDSON OEM PART NUMBERS:
• 31458-66
• 31458-66A
• 31458-66B
• 31458-66C
• 31458-66TA

PRESTOLITE PART NUMBERS:
• MGL4004
• P66A

SPECIFICATIONS:
• Type: Motorcycle Starter
• Unit Type: Prestolite Type
• Design: DD (Direct Drive)
• Voltage: 12V
• Power: 1.6 KW
• Rotation: Counterclockwise (CCW)
• Tooth Count: 10
• Gear/Pinion OD: 0.65 in (16.6mm)
• Product Finish: BLACK (Black Enamel Paint)
• Overall Length: 8.175 in (207mm)
• Field Case/Body Length: 6.0 in (154mm)
• Overall Diameter: 2.4 in (60mm)
• Mounting Hole Spacing: 3.0 in (77mm) center to center
• Mounting Thread: 1/4-20 (large)
• Weight: 8.34 lbs (3.79 kg)

APPLICATION:
Big Twin Models (1941-1983):
• FL Series - Hydra-Glide, Duo-Glide, Electra Glide
• FLH Electra Glide - 1200cc, 1340cc
• FLT Tour Glide - 1340cc (1980-Mid 1983)
• FXR/FXRS Super Glide II - 1340cc (1982-1983 Prestolite type)

Sportster Models (1975-1985):
• XLH Sportster - 1000cc Ironhead
• XLCH Sportster - 900cc, 1000cc, 1200cc
• XLCR Cafe Racer - 1000cc
• XLS Roadster - 1000cc
• XLX-61 - 1000cc
• XR1000 - 1000cc Performance

ENGINE TYPES:
• Shovelhead - 1200cc (1966-1978), 1340cc (1978-1984)
• Ironhead Sportster - 900cc, 1000cc (1957-1985)
• Pan/Knucklehead transition (1941-1965)

DIMENSIONS (VERIFIED FROM PRODUCT IMAGES):
• Overall Length: 8.175 in (207mm)
• Field Case Length: 6.0 in (154mm)
• Overall Diameter: 2.4 in (60mm)
• Mounting Hole Spacing: 3.0 in (77mm)
• Mounting Thread Size: 1/4-20
• Gear OD: 0.65 in (16.6mm)

⚠️ CRITICAL WARNINGS:
• PRESTOLITE TYPE ONLY - This starter ONLY fits bikes originally equipped with Prestolite type starters
• NOT for Denso, Shindengen, or other starter types
• BLACK FINISH - Not chrome or polished
• Verify OEM part number from your original unit
• Some model years used multiple starter types
• Check your service manual for correct type

INSTALLATION NOTES:
• Direct bolt-on replacement
• Use anti-seize on mounting bolts
• Verify electrical connections before installation
• Test function before final assemblyPRODUCT NOTICE:
As a parts distributor we mostly sell aftermarket parts (any OEM parts would be noted as such). Aftermarket parts are not sourced from the original vehicle or equipment manufacturer, but are designed to function the same as - if not better than - the original. All parts sold are new.WARNING - This product may expose you to chemicals such as Lead, Carbon Black, Silica, Crystalline which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov
FL/FLH ELECTRA GLIDE SERIES (1941-1983):
FL Series (Pre-1977):
• FL (1941-1976) - All models with electric start
• FLF (1954-1964) - Hydra-Glide, Duo-Glide
• FLFB (1965-1969) - Electra Glide
• FLHF (1955-1972) - Super Sport, Police
• FLHFB (1965-1969) - Electra Glide
• FLHB (1965-1969) - Electra Glide

FLH Electra Glide Models:
• FLH Electra Glide (1970-1978) - 1200cc Shovelhead
• FLH Electra Glide (1979-1983) - 1340cc Shovelhead
• FLH Electra Glide Anniversary (1978) - 1200cc Special Edition
• FLH Electra Glide Classic (1977) - 1200cc
• FLH Electra Glide Classic (1979-1980) - 1340cc
• FLHC Electra Glide Classic (1979-1981) - 1340cc
• FLHS Sport Glide (1977) - 1200cc
• FLHS Electra Glide Sport (1980-1982) - 1340cc
• FLHF Sport Glide II (1982) - 1340cc

FLT TOUR GLIDE SERIES (1980-1983):
• FLT Tour Glide (1980-1983) - 1340cc Shovelhead
• FLTC Tour Glide Classic (1981) - 1340cc
⚠️ NOTE: Prestolite type unit for 1980-Mid 1983 ONLY (Black Enamel Paint)

FXR/FXRS SUPER GLIDE II SERIES (1982-1983):
• FXR Super Glide II (1982-1983) - 1340cc Shovelhead
• FXRS Super Glide II (1982-1983) - 1340cc Low Glide
⚠️ NOTE: Prestolite type starter (Black) ONLY

SPORTSTER SERIES (1975-1985):
XLH Sportster Models:
• XLH Sportster (1975-1985) - 1000cc Ironhead
• XLH Sportster Anniversary (1978) - 1000cc Special Edition
• XLH Touring (1977) - 1000cc
• XLHA Sportster Anniversary (1982) - 1000cc

XLCH Sportster Models:
• XLCH Sportster (1975-1978) - 1000cc Kick/Electric
• XLCH (1972-1979) - 900cc, 1000cc, 1200cc, 1340cc various years

Special Sportster Models:
• XLCR Cafe Racer (1977-1978) - 1000cc
• XLS Roadster (1979-1985) - 1000cc
• XLSA Roadster Anniversary (1982) - 1000cc
• XLX-61 (1983-1985) - 1000cc
• XR1000 (1983-1984) - 1000cc Performance

ENGINE APPLICATIONS:
• Shovelhead Engines - 1200cc (1966-1978), 1340cc (1978-1984)
• Ironhead Sportster Engines - 900cc, 1000cc (1957-1985)
• Pan/Knucklehead transition models (1941-1965)

RIDING STYLES:
• Touring - Long distance, cross-country
• Cruising - Highway and backroad riding
• Custom builds - Choppers, bobbers
• Classic/Vintage restoration - Period-correct parts
• Daily rider - Reliable transportation

⚠️ CRITICAL COMPATIBILITY NOTES:
• PRESTOLITE TYPE ONLY - Not for Denso or other starter types
• BLACK FINISH - Black enamel paint (not chrome)
• Verify your bike's starter type before ordering
• Some years/models used different starter systems
• Always check OEM part number for fitment