[Angel And The Wolf]

I don't really need two engines, and I can't think of an easy way to connect two motorcycle engines BEFORE the transmissions. I only need one engine, an extra transmission, and a Spur Gear Differential.

A CB900C HAS 10 speeds, but 5 of them are only 117% higher than the other 5, two are almost identical:

1st Low Range----- 13.99
1st (High Range)-- 11.97
(2nd) (Low Range)--9.54
2nd (High range)----8.16
(3rd) (Low Range)--7.45
3rd (High Range)---6.37
(4th) (Low Range)--6.14
4th (High Range)---5.25
(5th) (Low Range)--5.26
5th (High Range)---4.50

and many shifts require both an upshift AND a range shift. (Shifts are in Parenthesis)


Using two transmissions and a differential gives upshifts that require only one transmission upshift at a time, alternating left, and right. (Each shift is in parenthesis)

Shift
Patern
1/1 13.990
1/(2) 11.76
-------------------------------(Not Used) 1/3 10.720
-------------------------------(Not Used) 1/4 10.065
-------------------------------(Not Used) 1/5 9.625
(2)/2- 9.540
2/(3)- 8.495
--------------------------------(Not Used) 2/4 7.840
(3)/3 -7.450
--------------------------------(Not Used) 2/5 7.400
--------------------------------(Not Used) 1/neutral and braked 6.995
3/(4)- 6.795
--------------------------------(Not Used) 4/4 6.140
3/(5)- 6.355
(4)/5- 5.700
--------------------------------(Not Used) 5/5 5.260
--------------------------------(Not Used) 2/neutral and braked 4.770
--------------------------------(Not Used) 3/neutral and braked 3.725
4/(neutral and locked) 3.070
---------------------------------(Might have to machine another neutral stop
----------------------------------in second transmission shift drum past 5th.)
(5)/neutral and locked 2.630

You will notice that 4/locked, and 5/locked each give a higher cruising ratio than the CB900C's 5th High Range.

I chose these 10 ratios from the 20 possible for the ease of shifting.

Comparing the two patterns:

CB900C 10 speeds----------Two CB single range transmissions and differential

1st Low Range- 13.99------------------1/1 13.990
1st High Range 11.97-------------------1/2 11.765
2nd Low Range---9.54------------------2/2 9.540
2nd High range---8.16------------------2/3 8.495
3rd Low Range----7.45------------------3/3 7.450
-------------------------------------------3/4 6.795
3rd High Range---6.37------------------3/5 6.355
4th Low Range----6.14
-------------------------------------------4/5 5.700
4th High Range---5.25
5th Low Range----5.26
5th High Range---4.50
-------------------------------------------4/neutral and braked 3.070
-------------------------------------------5/neutral and braked 2.630