Gilera 2008 MSS Nexus User Manual (English)

Questions and Answers:

R
Roberto DuncanAug 13, 2025
How to improve poor performance on my Gilera 2008 MSS Nexus?
- B
  Bobby ThompsonAug 13, 2025
  To address poor performance in your Gilera Scooter, begin by checking the injection load relay related to the fuel pump. Other solutions include: descaling the cylinder, piston, head, and valves if there's an excess of encrustations in the combustion chamber; re-timing the system or replacing worn parts if the timing is incorrect; or replacing the muffler if it's obstructed. Also, clean or replace the air filter if it is blocked or dirty by removing the sponge, washing it with water and car shampoo, soaking it in a 50/50 petrol and specific oil mixture, pressing it without squeezing, and allowing it to drip dry before refitting.
M
Monica PattersonAug 17, 2025
What to do if my Gilera 2008 MSS Nexus's clutch is slipping?
- K
  Kimberly WilcoxAug 17, 2025
  If your Gilera Scooter's clutch is slipping, you should check the clutch system and the bell. If necessary, replace the affected components.
S
Sara ValentineAug 21, 2025
Why is my Gilera Scooter showing poor performance and the transmission belt worn?
- J
  John BeasleyAug 21, 2025
  If your Gilera Scooter is showing poor performance and the transmission belt is worn, the solution is to replace the worn transmission belt.
G
Garrett MillsAug 25, 2025
What to do if my Gilera 2008 MSS Nexus Scooter has an inefficient automatic transmission causing poor performance?
- M
  martinezericaAug 25, 2025
  If your Gilera Scooter has an inefficient automatic transmission, check the rollers and the pulley movement. Ensure the drive belt is in good condition. Replace any damaged parts and lubricate the moveable driven pulley with specific grease.
S
Stephanie ArcherAug 28, 2025
How to fix overheated valves causing poor performance in my Gilera Scooter?
- P
  Paul HawkinsAug 28, 2025
  If the valves are overheated on your Gilera Scooter, remove the head and the valves, then grind or replace the valves.
P
Peggy PopeSep 1, 2025
What to do if oil level exceeds maximum causing poor performance in Gilera 2008 MSS Nexus Scooter?
- L
  lutzaliceSep 1, 2025
  If the oil level exceeds the maximum in your Gilera Scooter, check for the causes and adjust the oil level to reach the correct level.
J
John BenjaminSep 5, 2025
What if the valve seat is distorted, causing poor performance in my Gilera 2008 MSS Nexus Scooter?
- J
  Jacob PriceSep 5, 2025
  If the valve seat is distorted in your Gilera Scooter, replace the head assembly.
P
parker20Sep 8, 2025
How to fix wrong valve adjustment causing poor performance in Gilera Scooter?
- M
  Matthew CastilloSep 8, 2025
  If the valve adjustment is wrong on your Gilera Scooter, adjust the valve clearance properly.

Gilera 2008 MSS Nexus Specifications

General

Year	2008
Category	Scooter
Manufacturer	Gilera
Model	MSS Nexus
Transmission	Automatic
Front Suspension	Telescopic fork
Front Brake	Single disc
Rear Brake	Single disc
Engine Type	Single cylinder, 4-stroke
Fuel System	Carburettor
Fuel Capacity	15 liters
Rear Suspension	Double shock absorber
Seat Height	815 mm

Summary

Characteristics

Vehicle Identification

Details on chassis and engine prefixes for vehicle identification.

Engine Technical Data

Comprehensive specifications for the engine, including type, capacity, bore, stroke, etc.

Wheels and Tyres

Information on wheel rim types, tyre specifications, and tyre pressure recommendations.

Tightening Torques

Specific torque values for various fasteners across steering, chassis, and suspension components.

Tooling

Specific Tools

List of specialized tools required for various maintenance and repair procedures.

Maintenance

Scheduled Maintenance Table

A table outlining routine maintenance tasks and intervals based on mileage.

Checking the Spark Advance

Procedure for checking and verifying ignition timing using a strobe light.

Engine Oil

Instructions for changing engine oil, including replacement of the oil filter and checks.

Troubleshooting

Engine - Poor Performance

Identifies common causes and solutions for engine performance issues.

Engine - Starting Difficulties

Lists potential causes and troubleshooting steps for engine starting problems.

Braking Issues

Addresses problems related to insufficient braking and brake overheating.

Electrical System

Components Arrangement

Visual guide to the location of key electrical system components on the vehicle.

Immobiliser System

Details on the anti-theft immobilizer system, its components, and checks.

Fuses

Information on fuse box locations and the circuits protected by each fuse.

Engine

Automatic Transmission

Procedures for removing and inspecting transmission components like the cover and air duct.

Engine Crankcase - Crankshaft

Procedures for splitting crankcase halves and inspecting crankshaft components.

Engine Oil Pump

Steps for removing, inspecting, and refitting the engine oil pump.

Injection

MIU Injection System

Overview of the integrated injection and ignition system and its parameters.

Troubleshooting Procedure

Guides for diagnosing and resolving common injection system faults and engine performance issues.

Fuel Supply System

Description of the fuel supply circuit, including pump, filter, and regulator.

Suspensions

Front Wheel Hub Overhaul

Steps for removing, inspecting, and replacing front wheel hub bearings.

Steering Column

Procedures for removing and refitting the steering column components.

Shock Absorbers

Instructions for removing and refitting the front and rear shock absorbers.

Braking System

Rear Brake Calliper

Detailed steps for the removal, overhaul, and refitting of the rear brake calliper.

Front Brake Disc Inspection

Procedures for checking the thickness and run-out of the front brake disc.

Front Brake Pads

Instructions for removing, refitting, and checking the thickness of front brake pads.

Cooling System

Circuit Diagram

Explains the cooling system components and their interconnections via a circuit diagram.

System Bleed

Procedure for bleeding air from the cooling system to ensure proper operation.

Chassis

Helmet Bay

Instructions for removing and refitting the helmet compartment and associated electrical parts.

Fuel Tank

Procedures for removing and refitting the fuel tank and its related components.

Front Mudguard

Steps for removing and refitting the front mudguard.

Pre-delivery

Aesthetic Inspection

Checks for paintwork, plastics, scratches, and dirt as part of pre-delivery inspection.

Road Test

Guidelines for conducting a road test to evaluate vehicle performance and identify issues.

Specific Operations for the Vehicle

Instructions for fitting specific vehicle components like the windshield.

Time

Engine Operations

Standard repair times for engine removal, refitting, and oil changes.

Front Wheel Operations

Standard repair times for front wheel components like bearings, tyres, and discs.

Braking System Operations

Standard repair times for brake system components including calipers and discs.

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