Hi guys,
I am new to the forum and hope to build a 1970s Yamaha special (Like the Joey Dunlop bike on the cover of Classic Bikes recently)
I have a question. I have been looking at different frames from the following models and was wondering how different they are. They are XS250, XS400, RD250AC/LC , RD350AC/LC and RD400 frames. They all seem to look the same, but do any of you boffins out there know the differences in terms of width, geometry, weight, length, engine mountings, etc.
I have heard that the RD350 frame is geometrically the same as the TZ350 frame, only twice as heavy and with extra lugs for road equipment. So are any of the other frames the same as the RD350??
Many thanks,
Phil