Mikuni carb brass.

[Hemi Makutu]

This site offers some common Mikuni jets at good prices, ~ US$3.50 M-jet; $4.99 N-jet; $ 3.67 P-jet; $1.99 needles.. & they are good people to deal with..

www.startinglineproducts.com/catalog.cfm?pageID=detail&catalogID=3&catID=21&productID=363