2017 Yamaha GDR155 NVX Service Manual – GDR155 & GDR155-A Repair Guide PDF

Description

2017 Yamaha GDR155 NVX Service Manual – Full Workshop & Repair Guide for GDR155 and GDR155-A

This is the 2017 Yamaha GDR155 NVX service manual, published by Yamaha Motor Vietnam Co., Ltd. under document number B63-F8197-EZ as a 1st edition dated December 2016. It is written for the GDR155 and GDR155-A versions of the NVX 155 scooter (model codes B631 / B633) and is the reference a technician reaches for when a job needs the right torque figure, the right service limit, or the correct disassembly order – not a guess. Every chapter in the 2017 Yamaha GDR155 NVX service manual is built around the actual machine: exploded assembly drawings, wiring and hydraulic schematics, valve and piston measurements, electrical resistance values and step-by-step removal and installation procedures for the whole scooter.

File Details

• Manual type: Service manual (workshop repair manual)
• Brand / manufacturer: Yamaha
• Models covered: GDR155, GDR155-A (NVX 155)
• Model codes: B631 / B633
• Document number: B63-F8197-EZ
• Edition: 1st edition, December 2016
• Language: English
• Page count: 412 pages
• File format: PDF

Chapters Covered in the 2017 Yamaha GDR155 NVX Service Manual

• General Information – vehicle identification number and engine serial number locations, replacement parts notes, gaskets, oil seals and O-rings, lock washers, cotter pins, bearings, circlips, rubber parts, quick fasteners, electrical system handling, cable and connector checks, special tools
• Specifications – general, engine, chassis and electrical specifications plus general tightening torques, engine tightening torques and chassis tightening torques
• Periodic Checks and Adjustments – periodic maintenance charts for the emission control system and general maintenance and lubrication, fuel line and fuel filter checks, spark plug, valve clearance, engine idling speed, exhaust system, air filter element, breather hoses, V-belt case air filter, battery, brake operation, brake pads and shoes, brake fluid, brake hoses, brake bleeding, wheels, tires, wheel bearings, steering head, chassis fasteners, levers, sidestand, centerstand, front fork, rear shock absorbers, engine oil, coolant, final transmission oil, V-belt, brake light switches, cables, throttle grip, switches and headlight beam
• Chassis – general chassis removal and installation, front wheel, rear wheel, front brake, rear brake, ABS (GDR155-A), handlebar, front fork, steering head, rear shock absorber assemblies and swingarm
• Engine – compression pressure measurement, engine removal, cylinder head, camshaft, valves and valve springs, cylinder and piston, V-belt automatic transmission, starter generator, oil pump, transmission, crankshaft
• Cooling System – radiator, thermostat, water pump
• Fuel System – fuel tank, fuel injector, air filter case, throttle body
• Electrical System – ignition system, electric starting system, Stop and Start System, charging system, lighting system, signaling system, fuel injection system, fuel pump system, ABS, smart key system, electrical components and switch checks
• Troubleshooting – general troubleshooting, starting failure and hard starting, incorrect engine idling speed, poor medium and high speed performance, faulty clutch, overheating, overcooling, poor braking performance, faulty front fork legs, unstable handling, faulty lighting or signaling, self-diagnostic function and diagnostic code tables, event code table, complete wiring diagrams for both GDR155 and GDR155-A

Read together, those nine chapters describe the whole scooter rather than a slice of it. The 2017 Yamaha GDR155 NVX service manual starts with identification and workshop practice, moves into the specification and tightening torque tables that every later job depends on, then walks system by system through the chassis, engine, cooling, fuel and electrical groups. Each procedure ends where it should – with the torque figure, the wear limit or the resistance value the component needs to be returned to service correctly.

What This Manual Lets You Do on a GDR155 or GDR155-A

The GDR155 NVX is a liquid-cooled, SOHC, single-cylinder 155 cm³ scooter, and its layout means work spreads across several systems at once. A valve clearance job, for example, needs the camshaft and rocker arm chapter together with the valve clearance adjustment figures; a V-belt service needs the automatic transmission chapter with the sheave nut torques and the lubricant call-outs. This manual gives you all of them in one file instead of piecing them together from scattered sources.

Specifically, this Yamaha NVX 155 repair manual supports:

• Top-end work – cylinder head removal and installation, camshaft and rocker arm inspection, valve clearance adjustment, valve and valve guide measurement, valve seat lapping, valve spring checks
• Bottom-end work – cylinder and piston measurement, piston ring end gap and side clearance, piston pin clearance, crankshaft runout and width checks, crankcase separation and reassembly
• Driveline service – V-belt inspection and replacement, primary and secondary sheave disassembly, clutch housing and clutch shoe measurement, primary sheave weight wear limits, sheave lubrication
• Cooling system – coolant drain and refill, radiator and cap pressure testing, thermostat opening checks, water pump disassembly and seal installation
• Fuel and air – fuel tank removal, fuel pump and fuel filter service, fuel pressure testing, fuel injector checks, air filter case, throttle body and ISC unit cleaning
• Electrical diagnosis – ignition coil and spark plug cap resistance, starter generator checks, fuel sender resistance, coolant temperature sensor resistance, VVA solenoid resistance, relay and diode checks, fuse ratings
• Brake and ABS work – front brake caliper and master cylinder service, brake pad replacement, brake bleeding, rear drum brake inspection, hydraulic unit operation tests and ABS fault code diagnosis
• Body and chassis – front wheel, rear wheel, front fork, steering head adjustment, handlebar, rear shock absorber, swingarm, and full body panel removal sequences

Why the Correct Procedures and Specifications Matter Here

Small scooters punish shortcuts. A cylinder head nut torqued out of sequence, a valve clearance set at the wrong temperature, a V-belt installed without the sheave faces cleaned, or a brake system bled with the wrong DOT fluid will all produce symptoms that look like something else entirely. This 2017 Yamaha GDR155 NVX workshop manual removes that ambiguity by giving the numbers Yamaha specifies – valve clearances, ring end gaps, runout limits, brake fluid type by variant, tightening torques for engine and chassis – alongside the procedure that uses them. Troubleshooting tables and diagnostic code references help trace a fault to the right component before any part is ordered or replaced.

Get the GDR155 NVX Service Manual Instantly

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The full 2017 Yamaha GDR155 NVX service manual is delivered as an instant PDF download – no waiting, no shipping, no physical book to keep on a shelf. Open it on a laptop, tablet or phone in the workshop, print the pages for the job in front of you, and keep the rest of the file clean. Whether you are adjusting valve clearance on a GDR155, servicing the V-belt transmission, chasing an ABS fault code on a GDR155-A, or rebuilding the top end, this manual puts the procedures and specifications for the NVX 155 in one place and in the order the work has to be done.