Yamaha YFM350 Warrior User Manual

INSTRUCTION SUPPLEMENT FOR 1987-
LATER YAMAHA YFM350 WARRIOR
Removing stock carburetor and cables.
1. Remove seat and gas tank. Make sure fuel
petcock is in “off” position.
2. Remove throttle cable paying close attention
to routing, as the new cable(s) will need too
be routed the same.
3. Remove stock carburetor and stock throttle
housing.
Preparing motor for carburetor install
1. Remove stock manifold from cylinder head.
2. Place supplied o’ring into aluminum flange
as pictured in figure 1.
Figure 1.
3. Install aluminum and rubber flange to motor
using supplied bolts. See Figure 2. The
shorter 25mm bolt will need to be placed in
the bottom hole. IMPORTANT NOTE: Install
the aluminum flange with the o’ring towards
the motor and the thick side up.
Figure 2.
Twist Throttle Instructions
1. Install the throttle cables into the supplied
throttle housing and place onto clean
handlebar end.
2. Route throttle cables through frame as stock
cable was routed.
3. Install the pull cable (long shoulder on cable)
into the 4:00 position and the return cable
end into the 1:00 position of the cable
wheel. Secure cables to cable bracket by
replacing end piece and Phillips screw. See
figure 3.
Figure 3.
Thumb Throttle Instructions

Yamaha YFM350 Warrior Specifications

General

Brand	Yamaha
Model	YFM350 Warrior
Category	Offroad Vehicle
Language	English

Summary

Removing Stock Carburetor and Cables

Prepare for Removal

Remove seat and gas tank, ensuring fuel petcock is off.

Remove Throttle Cables

Remove throttle cable, noting its routing for future use.

Remove Stock Carburetor

Remove the stock carburetor and its throttle housing.

Preparing Motor for Carburetor Installation

Remove Stock Manifold

Remove the stock manifold from the cylinder head.

Install Flange O-ring

Place the supplied o-ring into the aluminum flange.

Install Aluminum Flange

Install the aluminum flange with o-ring towards the motor, thick side up.

Twist Throttle Instructions

Install Throttle Cables

Install cables into throttle housing and place on handlebar.

Route Throttle Cables

Route cables through frame following stock routing.

Secure Cables to Bracket

Install pull and return cables into wheel, secure to bracket.

Thumb Throttle Modifications and Installation

Modify Throttle Housing

Modify stock thumb throttle housing for wide open throttle.

Install Thumb Throttle Cable

Thread new cable into housing and insert end into lever.

Secure Thumb Throttle Housing

Place and secure modified throttle housing back onto handlebar.

Carburetor Installation

Prepare Carburetor Cap

Remove hex plug from carb cap and install metering tool.

Attach Fuel Line

Attach fuel line to carburetor and secure with clamp.

Mount Carburetor

Place carburetor into manifold and air boot, tighten clamps.

Install Idle Cable

Install remote idle cable and adjust for wide-open throttle.

Throttle Cable Adjustment and Final Checks

Adjust Throttle Cables

Adjust throttle cables for approximately 1/8" of free play.

Check Throttle Operation

Ensure smooth operation and no binding across handlebar range.

Install Fuel Tank

Install fuel tank, connect fuel line, and check for leaks.

Prime Accelerator Pump

Prime pump by opening throttle 3-5 times; avoid flooding.