maybe they know where?
otherwise, given that u do some mods anyway, the mikuni isn t very expensive, you can get it for 80 aussie dollars from xmoto,
http://xmotos.com.au/
you also may need an intake (bolt on on both sides) as well. space maybe an issue, but one could measure or find out from a raptor mod page?
the jets for the mikuni u can order from ian williams motorsport in south australia, he s got all sizes under the sun:
http://www.ianwilliamstuning.com.au/mikunipartsjets/
last time i spoke to him he said he doesn t deal in keihin parts
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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