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)
COMPATIBLE MOTORCYCLE LINES:
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 assembly
PRODUCT 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
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