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Internal combustion engine with automatic compression release — Harley-Davidson patent US5957097A (1999)

PatentUS5957097A
TypeUtility patent
Filed1997-08-13
Granted1999-09-28
InventorJohn William Schanz
SystemEngine

“An internal combustion engine comprising a cylinder having an exhaust port, a piston movable within the cylinder in a compression stroke, an exhaust valve for opening and closing the exhaust port, and a cam shaft including a cam member for selectively moving the exhaust valve between open and…”

Full patent textDownload PDFShop engine parts

Drawings (1 sheet)

Internal combustion engine with automatic compression release — sheet 1

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.