Has anyone modified or know of a company that modifies YZ85's to fit perhaps a TTR90/TTR125 engine?
i have seen BBR do a lot of Honda's i was just wondering if there are any gear heads here that did this themself or knew of a company that does these modifications
I'm not sure if your primary interest is a do-it-yourself project or a butt-kicking YZ based mini thumper, but if it is the latter, you may want to talk to the guys at PAX racing. I picked up some parts from them recently and while we were talking conversions, they mentioned they have a complete bike done by them based on YZ80. I believe it has an XR100 motor.
Hope that helps some. Good luck.