Built this for track. motorized bike races and AMRA.
Started with a cromo 24" bmx frame off eBay. made in China, I think, but has "California Chromoly" stickers on it.
Stretched it 3", raised the down tube and welded up motor mounts, cable guides, etc.
24" x 3" double-walled alloy rims, 105g spokes laced to moped drums.
Minarelli V1 with polini kit, modified ktm 50 xchamber, 16mm mikuni.
Polished 22oz camping fuel bottle tank with quick release mount.
Weighs 68lbs and hauls ass.