The following fastener dimensions have been measured from a 2006 GS500E, so may not be appropriate for all other models.
Where speciality components are found, such as shouldered washers, the closest conventional replacements have been listed instead.
This page is a work in progress and will periodically be updated.
Contents
Fastener details are sorted according to their appearance in parts fiche diagrams (which are readily available online).
2nd air
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
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Air cleaner
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
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Battery
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
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Body cowling
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
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|
Cam chain
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
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Camshaft and valve
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
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|
Carburettor
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
| Float bowl
| M4
| 0.7
| 10
| Pan
| -
| -
|
| Top cover
| M5
| 0.8
| 12
| Pan
| -
| -
|
| Valve check solenoid bracket
| M4
| 0.7
| 8
| Pan
| -
| -
|
| Vacuum chamber to frame
| M6
| 1.0
| 20
| Flanged hex
| -
| -
|
Clutch
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
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Crankcase
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
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|
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|
Crankcase cover
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
| Contact breaker cover
| M5
| 0.8
| 16
| Flanged hex
| -
| -
|
Crankshaft
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
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|
Crankshaft balancer
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
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|
Cushion lever
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
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|
Cylinder
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
|
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|
|
Cylinder head
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
| Cylinder head front bolt
| M6
| 1.0
| 30
| Flanged hex
| -
| Referred to in some manuals as "6mm bolt"
|
Cylinder head cover
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
|
|
|
|
Electrical
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
|
|
|
|
Footrest
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
| Footguard to footrest bracket
| M6
| 1.0
| 12
| Flanged button
| -
| -
|
Frame
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
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|
|
Frame cover
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
| Fairings to frame
| M6
| 1.0
| 20
| Hex
| Form G
| -
|
Front caliper
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
|
|
|
|
Front damper
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
| Axle clamp bolt
| M8
| 1.25
| 40
| Flanged hex
| -
| -
|
Front fender
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
| Brace to front fender
| M5
| 0.8
| 18
| Flanged button
| 15mm penny
Flanged nut
| -
|
| Brace to forks
| M6
| 1.0
| 16
| Flanged button
| -
| Use 20mm length fastener to secure speedometer cable guide no. 3
|
Front master cylinder
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
| Hose clamp no. 2 to fork
| M6
| 1.0
| 12
| Flanged hex
| -
| -
|
Front wheel
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
|
|
|
|
Fuel cock
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
| Petcock to frame
| M6
| 1.0
| 12
| Cap
| Form A
| -
|
Fuel tank
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
| Fuel tank to frame
| M8
| 1.25
| 40
| Flanged hex
| -
| -
|
Gear shifting
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
|
|
|
|
Generator
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
|
|
|
|
Handle lever
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
|
|
|
|
Handle switch
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
|
|
|
|
Handlebar
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
| Rear view mirror
| M10
| 1.25
| 15
| -
| -
| -
|
Headlamp
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
| Headlight rim
| M5
| 0.8
| 12
| Countersunk
| -
| -
|
Headlamp housing
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
|
|
|
|
Muffler
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
|
|
|
|
Oil cooler
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
|
|
|
|
Oil filter and oil pump
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
|
|
|
|
Rear caliper
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
| Caliper body joining bolts
| M10
| 1.25
| 45
| Flanged hex
| -
| 14mm AF
|
| Caliper to caliper bracket
| M8
| 1.25
| 30
| Flanged hex
| -
| -
|
Rear combination lamp
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
| Lens screw
| M4
| 1.5
| 39
| Pan
| -
| Coarse self tapping screw with flat end
|
Rear fender
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
| Front of mudguard to frame
| M6
| 1.0
| 12
| Hex
| 20mm penny
| -
|
| Middle of mudguard to frame
| M6
| 1.0
| 16
| Flanged hex
| Form C
| -
|
| Rear of mudguard to frame
| M6
| 1.0
| 16
| Flanged hex
| -
| -
|
Rear master cylinder
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
| Rear master cylinder to footrest bracket
| M6
| 1.0
| 25
| Flanged button
| -
| -
|
| Reservoir cap machine screw
| M4
| 0.7
| 16
| Countersunk
| -
| -
|
| Banjo bolt
| M10
| 1.0
| 18
| Hex
| -
| -
|
Rear swinging arm
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
| Chain guard to frame
| M6
| 1.0
| 12
| Pan
| 20mm penny
| -
|
| Torque arm to swingingarm
| M10
| 1.25
| 41
| Hex
| Flanged metal lock nut
| 23mm shouldered
|
| Torque arm to caliper
| M10
| 1.25
| 34
| Hex
| Flanged hex lock nut
| 12mm shouldered
|
Rear wheel
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
|
|
|
|
Seat
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
| Passenger grab-rail
| M8
| 1.25
| 25
| Flanged hex
| -
| -
|
Signal generator
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
|
|
|
|
Speedometer and tachometer
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
| Speedometer clamp to fork
| M6
| 1.0
| 12
| Flanged hex
| -
| -
|
Stand
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
| Centre stand
| M10
| 1.25
| 60
| Hex
| Form A
Square spring washer
| Actual flat washer is DIN 433 (ISO 7092) but not commonly available
|
Starter clutch
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
|
|
|
|
Starting motor
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
|
|
|
|
Steering stem
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
|
|
|
|
Transmission
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
|
|
|
|
Turn signal lamp
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
| Lamp to mudguard
| M10
| -
| -
| -
| Form G
| -
|
Under cowling
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
|
|
|
|
Wiring harness
| Use
| Thread (mm)
| Pitch (mm)
| Length (mm)
| Head type
| Washers / Nuts
| Notes
|
|
|
|
|
|
|
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|
