yes, those silver arrows...but ideally on 50cc...
why don t they build more of these instead ?
https://commons.wikimedia.org/wiki/C...watercooled%29
and then for the salt flats:
https://de.wikipedia.org/wiki/Datei:...garre.JPG#file
they won titles in the 50s and a world champ of the 125s got killed on sth like this:
https://de.wikipedia.org/wiki/Datei:...nnFox.JPG#file
125 cc, 80 kg and a top speed of 180 km/h!
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1971 Garelli Gulp 50cc with open ports and 16 mm Bing Carbie + 1980 Honda XL
223 ZS 
+ 2007 Zongshen LZX200G + DR400SM