Its a new concept to me, goes against all the tgeory we were taught.
So i can see changing the big one a tooth or two, but changing the smaller even 1 tooth would really affect clearance a lot.
Must be increased wear ir noise when doing this ?
It is quite commonly done. These are stock Honda starter gear parts.
Old man Weissman, RIP, of Weissman Transmissions got his big start by changing ratios with only one of the gears for racers.
Most gear calculation software has the option to allow shifted profiles.
Cannot answer your last questionl
I'm just learning on this.Do the factory gears have enough clearance in their tooth engagement engineered into them to allow a one-tooth change on a single transmission gear in the cluster ? thanks,Bill
Clearance in tooth engagement is called backlash. It is usually approximately 0.005", more or less, depending on the size and pitch of the gears.
That in itself will not allow the ratio to be changed. The "pitch" of the altered gear cannot be changed but the pitch diameter, tooth profile, and number of teeth can be.
Typically, I think this involves reducing the tooth count on one of the gears and "fattening" the tooth form. a profile shift, to take up the "slack".
Going the other direction, thinning a tooth form, would probably weaken the gear's tooth form too much.
I just updated my Takisawa to precisely synchronize the main spindle with the milling spindle and bought a WTO gear hobbing unit to make some gears for myself.
This is being done to accommodate my CB750 billet crankshaft gear drive project. Already have the crankshafts. Attempting to machine the mating parts.
I am not an expert on this - just learning actually. I consider gear making to be "Black Magic" at this point, but it is quite interesting to me.
