Larger Friction Roller
I liked my BMP friction drive, but the 1.25" roller was too small.
I tried their 1.5" rubber roller, which wore out in less than a month.
I owned a Staton friction drive.It's a fine piece, but the bearings were a press fit onto both their rollers AND the drive housing. I had to pay a machine shop to remove and replace my rollers AND bearings. There was also the down time and inconvenience of taking the parts to the machinist.
The main reason I bought the BMP kit was to easily replace the bearings and friction roller. HOWEVER, BMP's assortment of rollers didn't fit my criteria...
SOOO I adapted the Staton friction rollers to the BMP drive housing!!!
After removing all of the BMP drive components, the Staton roller's ends need to be lightly sanded to remove a small amount of material. This will convert the roller's difficult pressfit to a user friendly slipfit onto the bearings. THEN, a simple bearing retainer needs to be made on the outboard side. This will keep the bearing from falling out at 35mph.
Ask me how I know this.
This will allow you to use the excellent Staton friction rollers of 1.375" and 1.5" on your BMP drive housing.
FWIW, I loved Staton 1.5" rollers.