We on the Savage have gearing options, limited, but some. First we can change the size of the rear tire, simple but limited.
Second we can put on a larger front belt drive pulley, many folks do this and most are happy with the higher overall gearing.
Third in combination with the larger front pulley, we can use a smaller rear pulley. This gives you a much higher final drive ( 2.6 to 1 compared to 2.98 to 1 stock ). My fav!
BUT, it makes the stock speedo basicly useless, and is high enough that starting off uphill with a passenger is,,, well, a challange.
The speedo can be overcome with a GPS unit, and the other thing, well, just put on a solo seat and move down here to Florida where we have no hills!
Fourth you can go with a chain conversion and have a wide choice of final drive options. Along with the joy of chain maintance and filth.
There is really no option, that I have heard of, to go internal and change the gear raitos in the tranny. ( If someone has done that please post your results. )
Now to the point of this post. This link will take you to a clip about motogp gearing.
https://www.youtube.com/watch?v=OIOtg6qiqqg&feature=emb_rel_endThis guy really knows what he is talking about and the options they have will blow your mind!
They can change-
final drive ratios
primary drive ratios
internal tranny gear ratios, one or more or all!
And they do this not just for rider preferences, but to suit different corners of each track!
And check out the shifters, they are linked to a pressure switch to blip the ignition when shifting, insted of the rider clutching or bliping the throtle for moto2 and moto3.
The top motogp bikes have a even better system they keep secret! ( but the riders don't touch the clutch unless starting or stoping )
I love my bike, primitve as it is. All this new hi-tech stuff is fine if you live for performance, ( cubic dollars, as the drag racers say )
I just want to cruise.
When I was at the salt flats in 18' one of the popular classes for the bikes was the 250 cc pushrod classes, and they haven't been made for decades!