Output shaft ratio????

[Kahunas]

I am going to (hopefully) spend some time on a dyno and need to know the output shaft ratio.
Thanks in advance...
Is it .9 to 1????

[mark the shark]

Service manual for my '93 says Primary Reduction Ratio 3.9:1 ~ 0.9:1
Secondary Reduction Ratio 1.65 (33/20)

Shark

[VMAX535]

The 800 cc Crank shaft gears have 42 teeth and the PTO transfer shaft has 43. This gives you a (42/43=) 0.9767:1 reduction at the pto stub shaft.

Therfore if the dyno say's your making power at 10,000 rpm the motor is actually turning at 10,238 rpm (10,000/0.9767) I am not sure what the number of teeth on a 750cc crank are but the same math would apply.

/Dan