Keyster ★ Keihin Slow Idle Jet #42

Aftermarket exhaust? High flow air filters? Looking for more power? You're gonna need to up-jet. Or maybe you're just cleaning the carbs and need some new stock size jets? We have the entire range available from #35 - #45. Keihin slow / pilot / idle jet. Quality Keyster Brand. Made in Japan. Pick your size from the dropdown menu above.

Make sure to look up the stock size in your owners manual and start there. Honda changed the carbs on the 550 and the 750 in '77 so make sure you have the older threaded style pilot jet.

Jet Dimensions:

Jet Height: 28mm
Outer diameter: 5.5mm

Equivalent to Honda OEM part numbers:

#35 - 99124-076-0350
#38 - 99124-076-0380
#40 - 99124-076-0400
#42 - 99124-076-0420
#45 - 99124-076-0450

Fits Honda:

CB125S - 1973-1982
CB350F - 1972-1974
CB400F Super Sport - 1975-1977
CB500K - 1971-1973
CB550F Super Sport - 1975-1977
CB550K - 1974-1976
CB750F Super Sport - 1975-1976 (carburetor models B750A, 7A, 657A, 657B)(1976 carburetor model 069A used #38)
CB750K - 1969-1976

And others. . .