Special Tools

The following special tools are necessary for complete and accurate tune-up and assembly. Use only the appropriate special tools as this will help prevent damage caused by the use of inappropriate tools or improvised techniques. Special tools, part numbers or both may differ depending on the country. When placing an order, refer to the list provided below to avoid any mistakes.

• For U.S.A. and Canada, use part number starting with "YM-", "YU-", or "ACC-".

• For others, use part number starting with "90890-".

EAS00027

Tool No.

Tool name/Function

Illustration

Flywheel puller

90890-01362

YU-33270-B

Adapter

90890-04089

This tool is used to remove the generator rotor.

90890-01701 YS-01880-A

Sheave holder

This tool is used to hold the generator rotor when removing or installing the generator rotor bolt or pickup coil rotor bolt.

90890-01304 YU-01304

Piston pin puller

This tool is used to remove the piston pins.

90890-01325

YU-24460-01

Adapter

90890-01352

YU-33984

Radiator cap tester Adapter

These tools are used to check the cooling system.

90890-01403 YU-33975

Steering nut wrench

This tool is used to loosen or tighten the steering stem ring nuts.

4P3

This tool is used to hold the damper rod assembly when loosening or tightening the damper rod assembly bolt.

90890-01471

YM-01471

Pivot shaft wrench adapter

90890-01476

Pivot shaft wrench Pivot shaft wrench adapter

This tool is used to loosen or tighten the pivot adjust bolt and engine mount adjust bolt.

Tool name/Function

Illustration

90890-01426 YU-38411

Oil filter wrench

This tool is needed to loosen or tighten the oil filter cartridge.

Rod puller

90890-01437

YM-01437

Rod puller attachment

90890-01436

Rod puller

Rod puller attachment

These tools are used to pull up the front fork damper rod.

Fork seal driver

90890-01367

YM-33963

Fork seal driver attachment

90890-01374

YM-8020-A

Fork seal driver weight Fork seal driver attachment

This tool is used to install the front fork's oil seal and dust seal.

Vacuum gauge

90890-03094

YU-08030

Vacuum gauge

This gauge is used to synchronize the carburetors.

Compression gauge

90890-03081 YU-33223 Adapter 90890-04136

Compression gauge Adapter

These tools are used to measure engine compression.

90890-03112 YU-3112

Pocket tester

This tool is used to check the electrical system.

Oil pressure gauge

90890-03153 YU-03153 Adapter 90890-03139

Oil pressure gauge Adapter

These tools are used to measure engine oil pressure.

90890 Yamaha Oil Gauge

90890-03174

Digital circuit tester

This tool is used to check the electrical system.

90890 03174

90890-03176 YM-03176

Fuel pressure adapter

This tool is needed to measure fuel pressure.

Yamaha Part 90890 03153

90890-03153 YU-03153

Pressure gauge

This tool used is to measure fuel pressure.

90890 03153

Tool No.

Tool name/Function

Illustration

90890-04044 YM-04044

Piston ring compressor

This tool is used to compress piston rings when installing the cylinder.

90890-03158

Carburetor angle driver

This tool is used to turn the pilot screw when adjusting the engine idling speed.

Valve spring compressor

90890-04019

YM-04019

Attachment

90890-04108

YM-01253

Valve spring compressor Attachment

These tools are used to remove or install the valve assemblies.

90890 04019

Middle driven shaft bearing driver 90890-04058 YM-4058 Mechanical seal installer 90890-04078 YM-33221

Middle driven shaft bearing driver Mechanical seal installer

These tools are used to install the water pump seal.

90890-04086 YM-91042

Clutch holding tool

This tool is used to hold the clutch boss when removing or installing the clutch boss nut.

90890-04101

Valve lapper

This tool is needed to remove and install the valve lifter.

90890-04111

Valve guide remover (0)

This tool is used to remove or install the valve guides.

90890-04112

Valve guide installer (04)

This tool is used to install the valve guides.

90890-04113 YM-04113

Valve guide reamer (04)

This tool is used to rebore the new valve guides.

90890-06754 YM-34487

Ignition checker

This tool is used to check the ignition system components.

Yamaha Ignition Tester 90890 06754

Tool No.

Tool name/Function

Illustration

90890-06756 YB-35956

Vacuum/pressure pump gauge set

This tool used to measure the vacuum pressure.

ACC-11001-

This bond is used to seal two mating surfaces (e.g., crankcase mating surfaces).

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