Intake Manifold Interface Adapter for Yamaha XJR400 (1993-1999) | OEM 4HM-13586-00 & 4HM-13596-00

Product Overview

Restore the smooth, high-revving soul of your Yamaha inline-four with the GOOFIT Carburetor Intake Manifold Set. Specifically designed for the 1993-1999 XJR400, this replacement set (OEM 4HM-13586-00 and 4HM-13596-00) is the essential fix for one of the most common maintenance issues on vintage XJR models.

As a high-performance air-cooled engine, the XJR400’s intake boots are subject to intense heat cycles. Over time, the original rubber becomes brittle and cracks, leading to vacuum leaks that cause "hanging idles," poor synchronization, and sluggish acceleration. Our manifolds are built from premium, heat-resistant materials to ensure a perfect airtight seal, giving your carburetors the stability they need to perform.

Product Compatibility

Direct replacement for early-generation Yamaha XJR400 4-cylinder engines. Please verify your OEM codes.

Brand	Model	Fitment Years	Replaces OEM Part #
Yamaha	XJR400	1993 – 1999	4HM-13586-00 (Left/Inner)
Yamaha	XJR400S	1994	4HM-13596-00 (Right/Inner)
Yamaha	XJR400R / RII	1995 – 1999	4HM-13586 / 4HM-13596

Specifications

Feature	Detail
OEM Reference	4HM-13586-00-00 / 4HM-13596-00-00
Material	High-Grade Aging-Resistant Synthetic Rubber
Quantity	Options for Individual or Full Set (4pcs)
Properties	Heat-Stable, Fuel-Resistant, High-Elasticity Sealing
Fitment Type	Direct Factory Performance Replacement

Key Features

• Precision Vacuum Integrity: Engineered to provide a 100% airtight seal between the carburetors and the cylinder head. This is critical for achieving perfect carburetor synchronization and a rock-steady idle.
• Heavy-Duty Durability: Manufactured from high-quality, flexible rubber that resists the "dry-rot" and cracking common in 25+ year-old factory parts. Built for long-lasting use even under the high thermal radiation of an air-cooled 400cc engine.
• Restores Ride Quality: Eliminates lean-running conditions that cause engine hesitation, backfiring, and overheating. Installing new interfaces is the most effective way to restore the crisp throttle response of your XJR.
• Direct OEM Fitment: Designed as a "plug-and-play" replacement for the 4HM series. The internal dimensions and mounting hole spacing are precision-matched to the factory engine ports for a hassle-free installation.
• Excellent Sealing Properties: The high-elasticity material ensures that even under engine vibration, the manifold remains securely clamped, preventing any unmetered air from entering the system.