[Patrick]

When you change to buggy gears you'll have to go up a pinion or two to keep the same final drive ratio, which means you'll have a pretty big pinion to do 45mph. The motor plate will need a little bit of moding, but I think you could do it. I was using 65/20 for racing. The motor hangs off the side of the plate a bit, because of the size of the spur, but it worked ok, so I'm sure 51/23 is doable.