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Motorcycle engine — Harley-Davidson patent US5615642A (1997)

PatentUS5615642A
TypeUtility patent
Filed1996-02-05
Granted1997-04-01
InventorJeffrey P. Coughlin
SystemEngine

“A motorcycle engine having a pair of cylinders, a piston disposed in each-cylinder, rotatably mounted flywheels, a crank pin mounted on the flywheels, and a connecting rod assembly for coupling the crank pin to the pistons. The connecting rod assembly includes a master connecting rod having a…”

Full patent textDownload PDFShop engine parts

Drawings (2 sheets)

Motorcycle engine — sheet 1Motorcycle engine — 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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US5687683A
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USD400128S
Motorcycle cam cover medallion
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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.