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Motorcycle cooling system — Harley-Davidson patent US4445587A (1984)

PatentUS4445587A
TypeUtility patent
Filed1981-12-16
Granted1984-05-01
InventorMichael J. Hillman
SystemEngine

“A cooling system for the internal combustion engine of a motorcycle includes a radiator and means defining air passages each having a forwardly facing inlet opening disposed respectively on the opposite sides of the motorcycle's front fork. Each air passage extends rearwardly from the inlet…”

Full patent textDownload PDFShop engine parts

Drawings (2 sheets)

Motorcycle cooling system — sheet 1Motorcycle cooling system — sheet 2

Parts for this system

32-0064
Magneto to Crankcase Oil Seal Ring and Gasket Kit
$6.35
14-0555
Rear Caliper Piston O-Ring
$10.64
15-1380
Rear Master Cylinder Gasket Kit
$10.64
23-0825
Handlebar Master Cylinder Piston Cup
$10.64

Check fitment first — add your bike and we flag what fits.

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Drawing from the US patent record (via Google Patents). A patent shows the invention as filed, not necessarily the production part on your motorcycle — confirm fitment for your model and year. Independent aftermarket retailer, not affiliated with Harley-Davidson, Inc.