Belt-tightener for motor-cycles — Harley-Davidson patent US973426A (1910)
PatentUS973426A
TypeUtility patent
Filed1909-11-27
Granted1910-10-18
InventorWilliam S Harley
SystemPrimary & final drive
“W. S. HARLEY. BELT TIGHTBNBR POE MOTOR CYCLES. APPLICATION FILED NOV. 27, 1909. Patented 001 18, 1910. rinrrnn s rarn a'rnnr caries. WILLIAM S. HARLEY, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO HARLEY-DAVIDSON MOTOR COMPANY, OF MILWAUKEE, VI'ISCONSIN. BELT-TIGHTENER FOR MOTOR-CYCLES. Specification of…”
Drawings (1 sheet)

Parts for this system
14-6909
Ultima Clutch Pulley Cover Oil Seal
$5.4020-8858
Ultima Belt Drive Outer Plate Support Spacer
$5.5237-9892
Ultima 6-Speed RSD Tranmission Pulley Cover Set Screw
$6.3520-8890
Ultima 2" Bagger Belt Drive Wave Washer
$6.35Check fitment first — add your bike and we flag what fits.
More primary & final drive schematics

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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.