Intake Manifold for Yamaha YZ80 1993–2001 YZ85 2002–2018

Product Overview

Restore a secure and properly sealed connection between the carburetor and reed-valve intake assembly with this replacement carburetor intake manifold, designed for compatible Yamaha YZ80 and YZ85 two-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 demanding motocross conditions.

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

Designed to replace Yamaha 4ES-13565-00-00 and 5PA-13565-00-00 applications when the dimensions and physical configuration match the original part.

Product Compatibility

Brand	Model	Year Range	OEM Reference	Fitment Notes
Yamaha	YZ80	1993–2001	4ES-13565-00-00	Confirm mounting pattern and original manifold shape
Yamaha	YZ85	2002–2018	5PA-13565-00-00	Standard and applicable large-wheel versions

OEM intake diagrams identify 4ES-13565-00-00 as the carburetor joint on both the 1993 and 2001 Yamaha YZ80. Yamaha’s official 2002 YZ85 diagram uses 5PA-13565-00-00, and the same number remains listed on the 2018 YZ85.

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

OEM Cross-Reference Numbers

Yamaha YZ80

• 4ES-13565-00-00
• 4ES-13565-00
• 4ES135650000
• 4ES1356500

Yamaha YZ85

• 5PA-13565-00-00
• 5PA-13565-00
• 5PA135650000
• 5PA1356500

Yamaha identifies these parts as Joint, Carburetor.

The 4ES and 5PA numbers are associated with different model generations. They should not be described as an official Yamaha supersession chain, even though this aftermarket product may be designed to replace both configurations.

Specifications

Specification	Details
Product Type	Carburetor Intake Manifold
Alternative Names	Carburetor Joint / Intake Boot / Carburetor Insulator
Inner Diameter	Approximately 35 mm / 1.38 in
Mounting-Hole Diameter	Approximately 6 mm / 0.24 in
Listed Mounting Measurement A	Approximately 57 mm / 2.24 in
Listed Mounting Measurement B	Approximately 47 mm / 1.85 in
Listed Mounting Measurement C	Approximately 75 mm / 2.95 in
Engine Type	Two-Stroke
Application	Carburetor-to-Reed-Valve Intake Connection
Fitment Type	Direct Replacement
Vehicle Type	Off-Road Motorcycle / Dirt Bike
Condition	New
Package Quantity	1 Intake Manifold

The original inch conversions have been adjusted for accuracy:

• 35 mm is approximately 1.38 inches.
• 57 mm is approximately 2.24 inches.
• 47 mm is approximately 1.85 inches.
• 75 mm is approximately 2.95 inches.

The three mounting measurements may refer to different bolt locations, flange dimensions, or diagonal reference points. Compare the exact measurement positions shown in the product images with the original manifold.

Key Features

• YZ80 and YZ85 Fitment: Designed for compatible 1993–2001 Yamaha YZ80 and 2002–2018 Yamaha YZ85 motorcycles.
• Helps Prevent Intake Leaks: Restores a sealed connection between the carburetor and reed-valve intake assembly.
• Durable Replacement Construction: Designed to withstand normal engine heat, vibration, fuel vapor, dirt, and off-road riding conditions.
• Replaces Aged Intake Joints: Suitable for replacing an original manifold that has become cracked, hardened, distorted, or difficult to seal.
• Direct-Replacement Design: Installs in the original position when the OEM number, openings, mounting pattern, and physical shape match.