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Harley-Davidson 45 Gear Ratios
To use this Chart
This Chart applies to 45" Harley-Davidson solos & Servi-Cars 1941-73, using the original 59 tooth clutch drum, 17 tooth transmission sprocket, and 37 tooth (Servi-Car) or 41 tooth (solo) rear sprocket. Rear tire diameter is premised at 26", normal for 5.00-16, 4.00-18, etc. Other tire diameters will affect figures proportionate to the ratio of diameters. |
Solo | |||
Motor Sprocket |
Final Drive Ratio |
Speed @ 5000 RPM |
RPM @ 60 MPH |
27 |
5.27-1 |
73 MPH |
4090 |
29 |
4.91 |
79 |
3810 |
30 |
4.74 |
82 |
3680 |
31 |
4.59 |
84 |
3560 |
32 |
4.47 |
87 |
3470 |
33 |
4.31 |
90 |
3340 |
34 |
4.19 |
92 |
3250 |
Servi-Car | |||
Motor Sprocket |
Final Drive Ratio |
Speed @ 5000 RPM |
RPM @ 60 MPH |
22 |
5.84-1 |
66 MPH |
4530 |
25 |
5.14 |
75 |
3990 |
26 |
4.94 |
78 |
3830 |
27 |
4.76 |
81 |
3690 |
29 |
4.43 |
87 |
3440 |
30 |
4.28 |
90 |
3320 |
31 |
4.14 |
93 |
3210 |
Standard motor sprocket tooth count is 22 for Servi-Car models , 27 for side-cars, 30-31 for solo & military. Sprockets over 25 tooth probably need the larger (100 link) solo primary chain.
See these other Victory Library booklets | |||||||||||||
"Harley-Davidson" name for reference purposes only. Not affiliated with Harley-Davidson Motor Co. | ||||||
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