So as I wait for metal to raise the motor I've got gearing questions I've got a 10t in front and a 54t rear with 41 chain 13 inch tires target rpm is around 5000 does anyone have any experience on tav gearing to tell me if I'm in the ballpark? Or should I try different gearing?
30 series TAV-2 with 6" Driven pulley have 0.90:1 overdrive.
54:10 w/ over drive is 4.86:1
13" Tires should have a circumfrence of ~3.4 ft.
5000 RPM = 40 mph.
I'm putting a Hemi on a 6" El Lobo (54T sprocket) with a 30 series TAV-2 as well. Just finished the engine. Now about to order the TC and Minibike.
I plan on gearing so 7500 RPM is 65mph which is the 54T and an 11T. The 10T should be a good sprocket for you to use (40mph at 5k RPM). With the TC, you could probably use anything from an 8T to a 12T sprocket, depending on how fast you want to go or how much torque you want.
With the 6" Driven, you get 2.68:1 Reduction at engagement. So 54:10 is 5.4 x 2.68 = 14.5:1.
So you get a range of 14.5 : 1 at engagement to 4.86 : 1 in overdrive. It is a decent range for 13" tires.
I put this together, today actually, for a minibike with 13" Tires, 54t rear sprocket and 30 series TAV-2 with 6" driven. Only I picked 5k cause that is closer to peak torque for me (guessing), not cause it is max RPM.
6" Options....
54 : 11 = 4.90:1, 4.42 :1 with 6" pulley, 65mph at 7500 RPM. 43mph at 5k
54 : 10= 5.40 :1, 4.86 :1 with 6" pulley, 60mph at 7500 RPM. 40mph at 5k
54 : 9 = 6.00 : 1, 5.40 :1 with 6" pulley, 54mph at 7500 RPM. 36mph at 5k
54 : 8 = 6.75 : 1, 6.08 :1 with 6" pulley, 48mph at 7500 RPM. 32mph at 5k
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