KYMCO Mongoose 250 ATV Service Manual Printed by Cyclepedia

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The KYMCO Mongoose 250 ATV service manual features detailed, photographs and wiring diagrams, complete specifications with step-by-step procedures performed and written by a veteran dealer trained ATV technician.  Note: Printed manuals are in black and white.

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KYMCO Mongoose ATVs covered by this service manual:

2003 KYMCO Mongoose 250
2004 KYMCO Mongoose 250
2005 KYMCO Mongoose 250
2006 KYMCO Mongoose 250
2007 KYMCO Mongoose 250
2008 KYMCO Mongoose 250
2009 KYMCO Mongoose 250

The KYMCO Mongoose 250 ATV manual covers the following topics:

General Information

MXer 125 150 Lubrication Points

Serial Number Locations
Service Precautions
Torque Values
Special Tools
Lubrication Points
Cable and Harness Routing
Wiring Diagram

Frame Covers-Exhaust Muffler

Service Information
Frame Covers
Exhaust Muffler Removal


MXer 150 Valve Clearance adjustment

Service Information
Maintenance Schedule
Fuel Line/Throttle Operation
Air Cleaner
Spark Plug
Valve Clearance
Carburetor Idle Speed
Ignition Timing
Cylinder Compression
Engine Oil
Transmission Oil
Drive Belt/Brakes
Headlight Beam Adjustment (On Road Only)
Steering System Inspection
Toe-In Adjustment
Drive Chain Slack
Drive Select Lever
Cable Inspection and Lubrication
Suspension Lubrication

Lubrication System

MXer150 Engine Oil Filter change

Service Information
Engine Oil & Oil Filter
Oil Pump

Fuel System

MXER 150 Carburetor Adjustment

Service Information
Fuel Tank
Fuel Valve
Throttle Valve
Air Cleaner

Engine Removal

KYMCO MXER 150 Engine Removal
Service Information
Engine Removal

Cylinder Head / Valves

KYMCO MXER 150 Camshaft Removal
Service Information
Cylinder Head Cover
Camshaft/Camshaft Holder
Cylinder Head


MXER 150 Piston Replacement

Service Information

Drive And Driven Pulleys

KYMCO MXER 150 Clutch Service Drive Belt
Service Information
Left Crankcase Cover
Drive Pulley
Clutch / Driven Pulley

Final Reduction

MXER 150 Transmission Removal

Service Information
Transmission Case Cover


MXER 150 Crankshaft Removal

Service Information
Crankcase/Crankshaft/Balance Shaft

Brake System

MXer 150 Rear Brake Rebuild

Front Hydraulic Brake
Service Information
Front Brake Fluid Change / Air Bleed
Brake Master Cylinder
Front Brake Caliper
Rear Hydraulic Brake
Rear Brake Master Cylinder & Pedal)
Rear Brake Caliper

Front Wheel – Front Suspension – Steering

MXer 150 Front Suspension Repair

Service Information
Front Wheel
Front Suspension
Tie Rod

Rear Wheel – Axle – Suspension

MXer 150 Rear Axle Replacement

Service Information
Rear Wheel / Axle / Axle Hub
Rear Swing Arm / Shock Absorber

Battery-Charging System AC Generator

MXer 150 Regulator Rectifier

Service Information
Charging System
A.C. Generator Inspection
A.C. Generator Coil and Flywheel
Resistor Inspection
AC Generator

Ignition System

MXer 150 Ignition System

Service Information
Ignition Unit / Change Gear Control
Ignition Coil
Pulser Coil

Starting System

KYMCO MXer 150 Starting System

Service Information
Starter Motor
Starter Relay
Starter Clutch

Bulbs / Instruments / Horn

KYMCO MXer 150 Bulb Replacement

Bulb Removal
Instrument (On Road Only)
Horn (On Road Only)

Additional information

Weight 1.280625 lbs
Dimensions 11.5 × 9 × 2 in