Transmission — Harley-Davidson patent US1542806A (1925)
PatentUS1542806A
TypeUtility patent
Filed1919-08-18
Granted1925-06-16
InventorJr Adam Ziska
SystemTransmission & clutch
“June 1,6, 1925. l . A. ZISKA, JR mANsuIssIoN Filed Aug. 18. 1919 Patented June 16, 1.9225. UNITED .STATES ADAM zIsKA, JR., o-E MILWAUKEE, WISCONSIN, AssIefNoizI rro HARLEY-DAVIDSON Moron Co., or MILWAUKEE, WISCONSIN, A CORPORATION or WISCONSIN. @TRANSMISSION Application fin-l' August 1s, T1919.…”
Drawings (1 sheet)

Parts for this system
12-6924
Clutch Release Cover Retaining Ring
$4.8612-1317
OE Transmission Retaining Ring for Dog Ring
$5.1814-6909
Ultima Clutch Pulley Cover Oil Seal
$5.4012-1318
OE Transmission Countershaft End Nut
$6.00Check fitment first — add your bike and we flag what fits.
More transmission & clutch schematics

US1247829A
Transmission-gear
1917 · Transmission & clutch

US1493513A
Clutch
1924 · Transmission & clutch

US1549976A
Disk clutch
1925 · Transmission & clutch

US2987934A
Motor vehicle automatic transmissions
1961 · Transmission & clutch
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.