About the Honda CB350G Twin
The products below explicitly list CB350G 1973. Keep the twin’s left/right ignition parts, front hydraulic brake and rear drum components separated, and check each product’s OEM reference and package quantity.
Honda’s factory shop manual identifies the CB350G as a 325 cc vertical parallel twin with a five-speed constant-mesh transmission and wet, multi-plate clutch. Its brake specification is equally important for parts selection: a front disc brake and an internal-expanding rear drum brake.
Honda’s minor-model-change table shows more than a brake update from the preceding CB350K4 specification. For the CB350G, Honda changed the fuel-tank pattern, revised the mounting angle and illumination of the speedometer and tachometer, added a pilot-lamp box between the meters and increased the rear-shock spring adjustment from three positions to five. These details help confirm a complete G model, but replaced instruments, tanks, shocks or front ends can hide them.
Identify the model and plan the repairModel and application differences
CB350G versus CB350K4
Factory front disc versus front drum
Honda’s change table states that the CB350 brake system changed from drum to disc for the CB350G. The G retained an internal-expanding rear drum.
Parts checkpoint: A disc conversion does not change the frame identity; verify the complete stamping and fitted hydraulic assembly.
CB350G twin versus CB350F Four
Different engines under a similar 350 name
The CB350G is the 325 cc vertical parallel twin. The CB350F is the four-cylinder model and has its own engine, carburetor and chassis applications.
Parts checkpoint: Use only a product listing that names CB350G 1973; a CB350F application does not establish G fitment.
Front and rear brakes
Hydraulic disc in front, mechanical drum at the rear
The front repair can involve the master cylinder, hose, caliper, piston and seal. The rear repair uses shoes and drum operating hardware.
Parts checkpoint: Keep front hydraulic parts and rear drum parts in separate repair orders.
Identify your motorcycle before orderingCB350G frame, engine and component checks
Honda’s shop manual lists the CB350G frame-number series beginning at 5000001. Record the complete frame stamping rather than relying on the side-cover badge or front disc alone. A converted CB350K can carry disc-brake components without becoming a CB350G.
- Frame identity: Confirm the CB350G model record and the complete frame number; Honda’s G row begins at 5000001.
- Engine: Confirm the 325 cc vertical parallel-twin configuration and the complete engine stamping. A replacement engine can create mixed applications.
- Front brake: Record the caliper, piston diameter, hose, master-cylinder bore and mounting hardware. Match hydraulic parts to the assembly actually fitted.
- Rear brake: Confirm the internal-expanding drum, shoe dimensions, cam/pivot ends and spring layout. Front caliper components do not service the rear.
- Carburetors and ignition: Record carburetor body markings and distinguish the slide diaphragm from the float needle and seat. Keep the left and right contact-point references separate.