The 785-24001-O-2 is a brass needle jet from Mikuni’s 389 series, made to fit TM32–TM38 flat-slide carburetors. It has a slightly larger bore than the O-0, giving the engine a bit more fuel during mid-throttle. This helps smooth out acceleration without making the mixture too rich, ideal if the motor feels a little lean in the middle range.
Jet Series: 389
Fits: TM32, TM34, TM36, TM38 Mikuni flat-slide carbs
Material: Brass
Length: About 47 mm
Head Diameter: Around 6.5 mm
Shaft Diameter: Roughly 5.2 mm