The Dax friction, the drive rollers slide onto a 1/2" drive shaft. The 1.25" roller has a one way bearing inside of it. The smaller roller has set screws to secure it to the drive shaft.
If the Dax 1/2 drive shaft stuck out about 7/16 of an inch on the right hand side of the channel, then the right hand shaft bearing could be held in with a split collar and rollers changed quickly. The bearing hole is 1 & 3/8" dia. and the large roller is 1& 1/4" dia.
That is how my diy friction drives are set up. With the 49cc Titan 4 strokes (from Dax) the 1&1/4" roller gives 35 mph.
My diy friction drives have the motor mounted against the channel, not sticking out from the channel almost 1 inch.
I believe the Staton rollers and shafts are one piece.
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