Main jet used in Mikuni RS and HS carburetors, including Old style 22mm thru 26mm Round Slide Carbs. Also used in 33mm Pumper Carbs. Will not fit Chinese Mikunis.
M5 x .75mm Thread

Main Jet for Mikuini Flat slides and 32mm up Round Slides

Fits Mikuni 22mm thru 26mm SMALL BODY Round Slide Carbs.

Fits the 24 and 28mm Flat Slide Mikunis. Will not fit Round Slide (22mm). Select Size

Main jet for the small body 22mm Small Body Mikuni carbs. Also referred to "Chinese" Mikunis (though not always true). These are also what is typically used in Mini-Bike & karts due to the lower cost. M5 x .8mm Thread

Gas = 130 Main, 12.5 Pilot
Fits Mikuni Small Body 22mm thru 26mm Round Slide Carbs that use the 5mm x .8mm thread.

Jet Kit for 24 mm Flat Slide Mikuni Gas, Includes 140 Main and 20 Pilot. Usually good for GX200s on Gas.

NO RETURNS ON JETS
MAKE SURE PICTURE MATCHES YOUR JET

Jet Kit for 28 mm Flat Slide Mikuni Gas, Includes 260 Main and 17.5 Pilot. Usually good for GX200/GX270s on Gas.

NO RETURNS ON JETS
MAKE SURE PICTURE MATCHES YOUR JET