Can the driven pulley self align or fixed?

[Adultlife]

Can the driven pulley be free to move on the jackshaft or does it need to be locked in? It seems some snowmobiles “float “ the driven

 

[bob58o]

I think I allowed mine to float like 1/2".
With the 40 series driven mounted the way you have it, it doesn't NEED to float.
I think there should be a 3/8" offset.

If you were using the reverse wound spring, the driven unit gets flipped around and it MUST float.

So, as is, it doesn't need to float.
BUT you asked "CAN IT FLOAT?"

I THINK SO. Mine does.

http://www.bmikarts.com/pdf/comet_40series.pdf

...the series 40 should be mounted inboard, then nothing has to float.
it's build so that the two moveable sheaves open in the same direction so the belt shift caused by the driver will be compensated by the openening of the driven.

Now, if mounted outboard this will NOT happen of course, instead the driver moves the belt in the exact opposite direction as the driven would be able to compensate, soooo belt misalignment adds up.
to a total of 7/8"

THAT amount needs to be compensated for, the driver must not float,
so the driven is the only part that could.
Well on an ordinary jackshaft that is....
on the GPS backplate there's just not enough room to have a floating driven..
So yeah, there's an inherent flaw IYAM.. but it's not in the Comet series 40

the backplate is a compromise and it might be worth taking in very few occasions (mini bikes with not enough room is the only I can think of)
since one thing will wear prematurely, best case the belt, worse rollers or moveable sheave of the driver...

'sid