Firstly US90 fenders were fiberglass. Also honda used alot of white injection molded plastic and painted it the the desired color. Not sure why. Maybe they had procurement problems for the desired colors or it was just cheaper to paint needed colors. I have a set of later model atc90 fenders that are also white underneath, but they do not look like fiberglass but seem to be a very hard injection molded plastic. White Factory 70 parts would be cool though.
Nicholson 500x (Project)
Nicholson 185s
Nicholson 110 (That takes an atc70 tank)
Ascott 500 head/350x (Project)
Homebuilt Racer Chromoly Suspension 110 (Ragin Runt)
PK Racing Suspension 70
A+ Inc Suspension 70
AWS Aluminum 90 frame
Hi Performance ATC Suspension frame rd350
Hi Performance ATC Suspension frame 90