K0-77 CT70 Carburetor Main Jet Kit

K0–1977 Honda CT70 Carburetor Main Jet Kit

Main jet kit for early Honda CT70 models equipped with the factory Keihin round bowl carburetor.

Includes a range of commonly used jet sizes to cover stock rebuilds, mild displacement increases, exhaust upgrades, and general fine tuning.

Jet Sizes Included

• #58
• #60
• #62
• #65
• #67

Stock Jet Size Reference (Per Clymer Manual)

Stock main jet size varies by carburetor part number. The carb number is stamped on the carburetor body near the intake manifold flange.

• HT7A – #60
• 594A – #58
• AT7B – #65
• 533A – #58

Use this as a baseline reference when tuning. Changes in altitude, exhaust, air filter, displacement, and engine condition will affect final jet size.

Whether you're restoring an original carb, rejetting after a fresh top end, or dialing in a freer-flowing exhaust, this kit gives you the flexibility to get your air/fuel mixture right without guessing.

Ideal for stock 70cc engines and mild performance builds using the original carburetor platform.

Fitment

• Honda CT70 K0 (1969–1971)
• Honda CT70 K1 (1972)
• Honda CT70 K2 (1973)
• Honda CT70 K3 (1974)
• Honda CT70 K4 (1975)
• Honda CT70 (1976–1977)

Fitment Note: Fits original Keihin round bowl carburetors only. Does not fit 1978+ square bowl carburetors or later CT70 models.