All items are in stock and ship immediately unless the corresponding “Add to cart” button text has changed to "Out of stock”; i.e. if you are able to put the items in the cart and complete checkout, it means that we have the items in stock and will ship them the same (or rarely, next) business day if the order is placed before 13:30 Central Time.

Main Jets

Mikuni Main Jet, N100.604, 77.5, 004-171
Part number:

Jet sizes other than original are not legal for sale or use on emission-controlled vehicles in the state of California and in other localities.


genuine Mikuni

Stock is size 125, part number 4G0-14142-35-A0, superseded from 620-14231-25-00.