triathloner
New Member
I'm building my own friction drive and am kind of copying statons or bmp's design. I am adapting to a 25 cc motor from the start because it's what I have. If I end up liking it I will probably upgrade to a bigger motor and will have to purchase a bigger drive roller/driveshaft setup. So I would like to know the inside dimension of the U-channel, so I can make mine the same for future drive roller purchase purposes. thanks for your help