Australian ED XR6 Member
Join Date: Apr 2001
Location: Central Coast NSW
Generally speaking the early australian clevo 302's were released with orange/redish painted valve colours, & the 351's were painted blue.
This is by no means conclusive as it is quite simple to change the colour of valve covers, or even the type of cover fitted.
only conclusive way is to check stroke length, either by measuring through sprkplug hole,or removing head(s), or removing sump.(not forgeting overboring etc)