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Primary housing assembly for a motorcycle engine — Harley-Davidson patent US7174875B2 (2007)

PatentUS7174875B2
TypeUtility patent
Filed2005-07-01
Granted2007-02-13
InventorPaul Nan-Jiune Liang
SystemPrimary & final drive

“A primary housing for a motorcycle engine includes an inner housing that defines internal coupling apertures, transmission coupling apertures, and external coupling apertures. Internal fasteners extend through the internal coupling apertures and the transmission coupling apertures to couple the…”

Full patent textDownload PDFShop primary & final drive parts

Drawings (7 sheets)

Primary housing assembly for a motorcycle engine — sheet 1Primary housing assembly for a motorcycle engine — sheet 2Primary housing assembly for a motorcycle engine — sheet 3Primary housing assembly for a motorcycle engine — sheet 4Primary housing assembly for a motorcycle engine — sheet 5Primary housing assembly for a motorcycle engine — sheet 6Primary housing assembly for a motorcycle engine — sheet 7

Parts for this system

14-6909
Ultima Clutch Pulley Cover Oil Seal
$5.40
20-8858
Ultima Belt Drive Outer Plate Support Spacer
$5.52
37-9892
Ultima 6-Speed RSD Tranmission Pulley Cover Set Screw
$6.35
20-8890
Ultima 2" Bagger Belt Drive Wave Washer
$6.35

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.