Intake Manifold | Honda CB350 / CL350 / SL350 K0

Description

Intake Manifold | Honda CB350 / CL350 / SL350 K0

Replacement carburetor intake manifold for Honda CB350 K0–K5, CL350 K0–K5, and SL350 K0 motorcycles. Also known as carburetor boots, isolators, intake pipes, or carb flanges. These manifolds seal the joint between the carburetor body and the cylinder head intake port. Replaces OEM 16211-286-040.

Sold individually. Each motorcycle uses two intake manifolds — one per carburetor.

Choose Your Option

• OEM Honda (6251): Genuine Honda intake manifold — original factory quality.
• Reproduction (6252): A well-fitting, budget-friendly alternative that seals and fits properly.

Why You Need This

Intake manifolds are one of the most commonly overlooked wear items on vintage Honda twins. The original rubber hardens, shrinks, and cracks over decades of heat cycles. Even manifolds that look fine on the outside can be hardened enough to leak — they get dry and stop sealing properly. The result is an air leak between the carburetor and cylinder head that leads to tuning difficulties. Fresh intake manifolds restore a proper seal and are recommended any time the carburetors are removed for service.

Complete the update with stainless steel intake manifold clamps for a better running and better-looking bike.

Specifications

Does Not Fit

CB350F (four-cylinder): This manifold is for the CB350 twin only. The four-cylinder CB350F uses a completely different intake manifold.

SL350 K1 and K2: The SL350 K1 and K2 use a different carburetor and intake manifold. This part fits the SL350 K0 only.

Installation

Difficulty: Easy — no special tools required

These manifolds are designed for use with factory-style air filters that support the weight of the carburetor from the rear. The new manifold should sit nice and clean on the carburetor with a good, firm connection. If using pod air filters, fabricate a hanging support to hold the carburetors up and off the intake manifolds. Without rear support, the weight of the carburetors can stress and damage the manifolds over time. Do not over-tighten the manifold clamps — snug is sufficient.