Drive Belt Size?
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Stage III
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Drive Belt Size?
I am starting week 4 on my project. Monday I will start installing the pulleys, rotors and transmission. Is their an easier way to find what drive belt length I will need without keep removing the rear tire and softtail in trial and error? I thought about using a string around the pulleys and measuring it but I cant find any specs on belt lenghts.
Big Kahuna HDF Member
Joined: Feb 2006
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From: USA
RE: Drive Belt Size?
That should get you close just make sure your adjustment is all the way in so you have some slack to tighten the belt. You may wish to consult an indy shop that works on custom bikes.
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Stage III
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RE: Drive Belt Size?
After I played some more today with the cameleon paint job I came home and did more research on drive belt sizes. This chart is what I'm going to go by. You take your trans pulley and your rear pulley teeth count and then measure center to center from your trans to rear axle to get the belt size.
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Here is the chart:
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Here is the chart:
Pulleys \\; \\; \\; Ratio \\; \\; \\;Belt Cen/Cen Belt Cen-Cen Belt Cen-Cen Belt Cen-Cen Belt Cen-Cen Belt Cen-Cen Belt Cen-Cen
70-34 2.05 To 1 136 22.932 \\; \\;135 \\; \\; 22.654 \\; 133 22.097 \\; \\; 132 21.819 \\; \\; 130 21.261 \\; \\; 128 \\; 20.704 \\; 126 20.146
70-33 2.12 To 1 136 23.059 \\; 135 \\; \\; 22.780 \\; 133 22.223 \\; \\; 132 21.945 \\; \\; 130 21.388 \\; \\; 128 \\; 20.829 \\; 126 20.200
70-32 2.18 To 1 136 23.186 \\; \\;135 \\; \\; 22.907 \\; 133 22.350 \\; \\; 132 22.071 \\; \\; 130 21.515 \\; \\; 128 \\; 20.955 \\; 126 20.397
70-31 2.25 To 1 136 23.312 \\; 135 \\; \\; 23.033 \\; 133 22.476 \\; \\; 132 22.197 \\; \\; 130 21.641 \\; \\; 128 \\; 21.080 \\; 126 20.521
70-30 2.33 To 1 136 23.438 \\; 135 \\; \\; 23.159 \\; 133 22.601 \\; \\; 132 23.323 \\; \\; 130 21.767 \\; \\; 128 \\; 21.205 \\; 126 20.646
70-29 2.41 To 1 136 23.564 \\; 135 \\; \\; 23.285 \\; 133 22.727 \\; \\; 132 22.448 \\; \\; 130 22.350 \\; \\; 128 \\; 21.330 \\; 126 20.771
65-34 1.91 To 1 136 23.683 \\; 135 \\; \\; 23.405 \\; 133 22.850 \\; \\; 132 22.572 \\; \\; 130 22.017 \\; \\; 128 \\; 21.462 \\; 126 20.905
65-33 1.96 To 1 136 23.811 \\; 135 \\; \\; 23.534 \\; 133 22.978 \\; \\; 132 22.701 \\; \\; 130 22.145 \\; \\; 128 \\; 21.589 \\; 126 21.033
65-32 2.03 To 1 136 23.939 \\; 135 \\; \\; 23.661 \\; 133 23.106 \\; \\; 132 22.829 \\; \\; 130 22.272 \\; \\; 128 \\; 21.716 \\; 126 21.160
65-31 2.09 To 1 136 24.067 \\; 135 \\; \\; 23.789 \\; 133 23.234 \\; \\; 132 22.956 \\; \\; 130 22.400 \\; \\; 128 \\; \\;21.488 \\; 126 21.287
65-30 2.16 To 1 136 24.195 \\; 135 \\; \\; 23.917 \\; 133 23.361 \\; \\; 132 23.083 \\; \\; 130 22.527 \\; \\; 128 \\; 21.970  \\;126 21.692
65-29 2.24 To 1 136 24.323 \\; 135 \\; \\; 24.044 \\; 133 23.488 \\; \\; 132 23.311 \\; \\; 130 22.654 \\; \\; 128 \\; 22.097  \\;126 21.819 \\;
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