The 785-24001-O-4 is a brass needle jet from Mikuni’s 389 series, made to fit TM32–TM38 flat-slide carburetors. The O-4 size flows more fuel than the O-2, giving your engine a richer mid-throttle mix. It's a solid choice if your bike feels a bit lean under load and you want smoother acceleration without going too rich.
Jet Series: 389
Fits: TM32, TM34, TM36, TM38 carbs
Material: Brass
Length: About 47 mm
Head Diameter: Roughly 6.5 mm
Shaft Diameter: Around 5.2 mm
WARNING:Cancer and Reproductive Harm www.P65warnings.ca.govwww.P65Warnings.ca.gov | WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Confirm the exact year, make, model and trim before ordering. Send us SKU 916346 with your vehicle info and we can help verify fitment.
Shipping services and final delivery cost are shown at checkout. Returns are confirmed before an RMA is issued — parts generally need to be uninstalled, unused and in original packaging. Full policy.
