I think upgrades should be in the spirit of what could be done at the time, but not neccesarily actual old parts if the parts can be seen. As you said elsewhere these are 15 year old bikes.
A radial caliper conversion, or even a set of 4 pad calipers? No, I couldn't do it either. I have wondered what a set of 4 pads looks like painted black though. Might just disappear. The radial pump master cylinder was used at the time so no problem there.
SPS spec ST4S engine? You would have to look very close to tell. I would love to do it.
Hybrid Mode
