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KYMCO MXU 450i - Service Manual

KYMCO MXU 450i
172 pages
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F O R EW O
RD
This
I<YMCO
Service MaOUill
con!Q
i
ns
service, maintenance, and troubleshooting information for the
2010
KYMCO
MXU
4Q0i
.
Tho3
complete manual
is
des
\gned to aid service . .personnel in service-or1ented
applications.
This manual is divided
intco
sections. Each section covers a specific ATV component or system and,
in addition to the standard service procedures, includes disassembling, inspecting, and assembling
Instructions, \M1en
using lthis manual as a guide,
the
technician should use discretion
as
lo
how
much disassembly
is
needed
to
correct any given condition.
The service technician
::•hould
pecome familiar with the operatlon and construction
of
each
component
or
system KYMCO. This manual will assist
tl'le
service technician
In
becoming more
aware
of
and efficient Wi
th
servicing procedures. Such efficiency no! only helps build consumer
confidence
but
also saves time and labor.
All
KYMCO ATV publications and decals display the words warnrng, Cautton. Note. and At This
Point to emphasize imoortant
information.
The symbol @i!Hilii!J Identifi
es
personal safety-related Information.
Be sure to
follow the directive because it deals
With
the possibility
of
severe personallnjury
or
even
death. The symbol
E '·
"ii!·
l
ll
identifies unsafe practices which may result in ATV-related
damage.
Follow the dfrecbve because
it
deals with the possibility of damaging
part
or
parts of the
ATV.
The
symbol
NOTE
:;
identifies supplementary lnformaiion worthy
of
particular attention. The
symbol
@AT THIS POINT directs the tech- nician to certain and specific procedures to promote
efficlency and to improve
clarity.
At
the time of publication, all information, photographs, and illustrations were technically correct.
Some photographs used
in
this manual are used for clarity purposes only and are
not
designed to
depict actual conditions. Because
KYMCO Inc. constantly refines and improves its products, no
retroactive obligation
is
i!'l(lllrred.
All materials and specificaotions are subject to change without notice. Keep this manual accessible
m the shop area for reference.
K
YMCO
Inc.
®
20
10 KYMCO h
ie.
October
2010
® "" Trademarks of KYMCO Inc., TaiWan

Table of Contents

Other manuals for KYMCO MXU 450i

Questions and Answers

  • S
    Stephanie HarperAug 16, 2025
    Why does my KYMCO MXU 450i engine lack power?
    • A
      andrea55Aug 16, 2025
      If your KYMCO Offroad Vehicle engine lacks power, try the following: * Adjust the clearance. * Replace the springs. * Re-time the valve gear. * Replace or service the rings and cylinder. * Repair the seats. * Clean or replace the plug. * Replace the arms and shafts. * Adjust the gap or replace the plug. * Clean the Fuel Injector. * Replace the Fuel Pump. * Clean the element. * Drain excess oil and change the oil. * Tighten or replace the manifold. * Replace the cam chain.
  • A
    Audrey FloresAug 19, 2025
    How to fix low compression in KYMCO MXU 450i engine?
    • C
      Calvin ByrdAug 19, 2025
      If your KYMCO Offroad Vehicle engine will not start or is hard to start due to low compression, you might need to adjust the clearance, replace the cylinder head, adjust the valve timing, replace the rings, replace or rebore the cylinder, tighten the plug, or check/replace the starter motor.
  • J
    jamesbakerAug 21, 2025
    Why does my KYMCO MXU 450i engine run poorly at high speed?
    • S
      Shane MartinezAug 22, 2025
      If your KYMCO Offroad Vehicle engine runs poorly at high speed, consider the following: * Shift into a higher gear or decrease speed. * Replace the springs. * Adjust the timing. * Replace the cams, arms, and tappets. * Adjust the gap. * Replace the ignition oil. * Clean the Fuel Injector. * Clean the element. * Clean or replace the hose. * Replace the fuel pump.
  • M
    markfordAug 25, 2025
    What to do if my KYMCO MXU 450i Offroad Vehicle engine overheats?
    • M
      Melissa JohnsonAug 26, 2025
      To address an overheating engine in your KYMCO Offroad Vehicle, you can try the following: * Clean the piston. * Add oil. * Drain and replace the gasoline. * Replace the pump. * Clean the circuit. * Fill the Engine Coolant to the upper limit. * Tighten or replace the manifold. * Check the fan fuse and replace the fan if necessary. * Replace the fan switch.
  • S
    Sarah SmithAug 28, 2025
    How to troubleshoot no spark issue in KYMCO Offroad Vehicle?
    • M
      Maria AndersonAug 28, 2025
      If your KYMCO Offroad Vehicle engine will not start or is hard to start due to a lack of spark, try cleaning or replacing the plug, cleaning and drying the plug, replacing the magneto, replacing the ECU unit, replacing the ignition coil, or replacing the high tension lead.
  • G
    Gregory BenjaminAug 31, 2025
    What causes dirty exhaust smoke in KYMCO MXU 450i Offroad Vehicle?
    • A
      Amy GreenAug 31, 2025
      If the exhaust smoke from your KYMCO Offroad Vehicle is dirty or heavy, you can try to drain excess oil and replace the oil, replace or service the rings and cylinder, replace the cylinder head, replace or service the cylinder, replace the valves, or replace the seals.
  • K
    Kristie DiazSep 3, 2025
    How to fix fuel delivery issues in KYMCO MXU 450i?
    • M
      martineztammySep 3, 2025
      If your KYMCO Offroad Vehicle engine will not start or is hard to start because no fuel is reaching the carburetor or fuel injector, try cleaning the vent hose, cleaning the Throttle body, cleaning or replacing the hose, cleaning or replacing the fuel filter, or replacing the fuel pump.
  • K
    Kathleen ShepherdSep 6, 2025
    What to do if my KYMCO MXU 450i engine stalls easily?
    • N
      Neil ThomasSep 6, 2025
      If your KYMCO Offroad Vehicle engine stalls easily, you can try to clean the plug, replace the magneto, replace the ECU unit, clean the Throttle Body, or adjust the clearance.
  • C
    Connor WelchSep 8, 2025
    Why is my KYMCO MXU 450i engine noisy (piston noise)?
    • J
      Jessica MichaelSep 9, 2025
      If your KYMCO Offroad Vehicle engine is noisy and the noise seems to come from the piston, you can try to replace or service the piston and cylinder, clean the chamber, replace the piston, replace the piston pin, or replace the rings and piston.
  • J
    joshua90Sep 12, 2025
    How to fix excessive valve chatter in KYMCO MXU 450i engine?
    • J
      Jacob PhelpsSep 12, 2025
      If your KYMCO Offroad Vehicle engine is noisy due to excessive valve chatter, you can try to adjust the clearance, replace the spring(s), replace the arm and shaft, replace the camshaft, or replace the tappets.

KYMCO MXU 450i Specifications

General IconGeneral
BrandKYMCO
ModelMXU 450i
CategoryOffroad Vehicle
LanguageEnglish

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