I bought a 47cc air-cooled stock standard pocket rocket off ebay 3 years ago in Nth QLD, and just looked after it really well and good fuel and racing pocket rocket oil etc. and was faster than a stock 04 crf50 i laughed when he said his honda is so much faster and i had no chance. although it was kinda scary on a bumpy road lol.
Cant remember mate, i saw it at autobarn or a shop like that has a pocket rocket on it, and says racing pocketrocket oil, not very useful i know im sorry, i was running 25:50 oil to fuel ratio.