The temp was climbing for these air cooled vintage bikes (and a few modern motocrossers too) to take on the Arizona Cycle Park vet track for the AMA 2015 Southwest Vet & Vintage Motocross Classic.  Many decades and many past and present OEMs were represented and fun had by all.

If you would like to see more pictures of yourself leave a comment below with your bike, number, and race you were in.