So anybody have a TZ or RS250 rolling chassis laying around?

[Walter Walker]

I wanted to build one of these a decade ago, and I still do. The TZ is the best option for multiple engine fit. A roller is difficult to find. You'll want at least a '91 and more likely a '94 or later. I know where a complete Honda RS250 is, but it's more work to get it to work. The key is the center line of the swingarm pivot relative to countershaft sprocket, and the distance between the two. I haven't seen many Aprilia RS250s that have been converted, but remember those Cup bikes are lacking compared to full-on purpose-built GP bikes.

Rising Sun Cycles?

I agree the TZ is the way to go. I wanted to build an all Honda bike but I don't think that's realistic after doing some research. I have ran across several Aprilias but I would rather go with the full out GP chassis. I want to give Trey the best package I can.