Intake Manifold for Yamaha WR400F WR426F YZ426F | 5SF-13597-00

Product Overview

Restore a secure and properly sealed connection between the carburetor and engine with this replacement carburetor intake manifold, designed for compatible Yamaha WR400F, WR426F, and YZ426F four-stroke dirt bikes.

This intake joint replaces an original manifold that has become cracked, hardened, loose, distorted, or difficult to seal after prolonged exposure to engine heat, vibration, fuel vapor, dirt, and off-road riding conditions.

A worn or damaged intake manifold can allow unmetered air to enter the engine, potentially contributing to unstable idle, hanging RPM, difficult starting, hesitation, inconsistent throttle response, or a lean-running condition.

Designed as a direct replacement for Yamaha 5JG-13597-00-00 and its updated replacement 5SF-13597-00-00, this intake manifold helps restore the original carburetor-to-cylinder-head connection when its dimensions and physical configuration match the original part.

Product Compatibility

Brand	Model	Model Code	Year Range	Fitment Notes
Yamaha	WR400F	WR400FM	2000	Does not cover 1998–1999 WR400F
Yamaha	WR426F	WR426FN / WR426FP	2001–2002	Verify OEM number and original boot shape
Yamaha	YZ426F	YZ426FM / YZ426FN / YZ426FP	2000–2002	Standard competition models

OEM intake diagrams list 5SF-13597-00-00 for the 2000–2002 YZ426F and 2001–2002 WR426F. The 2000 WR400F catalog also identifies the updated part as the replacement for 5JG-13597-00-00.

Model codes and specifications may vary by sales market. Confirm the original OEM number and physical dimensions before ordering.

OEM Cross-Reference Numbers

Yamaha

• 5JG-13597-00
• 5JG-13597-00-00
• 5JG1359700
• 5JG135970000
• 5SF-13597-00
• 5SF-13597-00-00
• 5SF1359700
• 5SF135970000

Yamaha identifies this part as Joint, Carburetor 3. The later 5SF-13597-00-00 supersedes the earlier 5JG-13597-00-00 in compatible applications.

Your original part does not need to display every number listed above. At least one compatible OEM number should match your motorcycle’s intake diagram or original manifold.

Specifications

Specification	Details
Product Type	Carburetor Intake Manifold
Alternative Names	Carburetor Joint / Intake Boot / Carburetor Insulator
Application	Carburetor-to-Engine Intake Connection
Opening Diameter 1	Approximately 40 mm / 1.57 in
Opening Diameter 2	Approximately 49 mm / 1.93 in
Maximum Outside Diameter	Approximately 61 mm / 2.40 in
Fitment Type	Direct Replacement
Vehicle Type	Off-Road Motorcycle / Dirt Bike
Engine Type	Four-Stroke
Condition	New
Package Quantity	1 Intake Manifold

The supplied diameter conversions have been adjusted for accuracy:

• 40 mm is approximately 1.57 inches.
• 49 mm is approximately 1.93 inches.
• 61 mm is approximately 2.40 inches.

The two inner-diameter measurements may represent the carburetor side and engine side. Compare the exact measurement locations shown in the product images with the original intake manifold.

Key Features

• Model-Specific Yamaha Fitment: Designed for compatible 2000 WR400F, 2001–2002 WR426F, and 2000–2002 YZ426F motorcycles.
• Helps Prevent Intake Leaks: Restores a sealed connection between the carburetor and cylinder-head intake port.
• Durable Construction: Designed to withstand normal engine heat, vibration, fuel vapor, dirt, and off-road riding conditions.
• Replaces Aged Intake Joints: Suitable for replacing a manifold that has become cracked, hardened, distorted, or difficult to seal.
• Direct-Replacement Design: Fits the original intake position when the OEM number, openings, length, angle, and mounting configuration match.