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Transmission

Triumph Bonneville · Clutch & Transmission incl. Gearchange Mechanism · 32 parts

Exploded parts diagram — Transmission, Triumph Bonneville

Open this diagram in the interactive viewer → Click any callout on the drawing to jump to the part.

Motorcycles this catalogue covers

Bonneville T100

Bonneville T120

Bonneville T120 Black

Our parts team checks fitment against your motorcycle before any order ships.

Every part on this diagram

1

Gearbox Assembly, Input, 5 Speed

Qty 1

Triumph has stock

$1056.22

Order-in Ask the parts desk

2

Gearbox Assembly, Output, 5 Speed

Qty 1

Triumph has stock

$1320.28

Order-in Ask the parts desk

3

Bearing, Ball, 25 x 62 x 17

Qty 1

Triumph has stock

$42.41

Order-in Ask the parts desk

4

Output Shaft, 5 Speed, Chain

Qty 1

No date from Triumph yet

$279.90

On backorder Ask the parts desk

5

Output Gear, 2nd, 45T

Qty 1

Triumph has stock

$142.58

Order-in Ask the parts desk

6

Bearing, Needle

Qty 1

Triumph has stock

$17.45

Order-in Ask the parts desk

7

Output Gear, 5th, 35T

Qty 1

Triumph has stock

$95.04

Order-in Ask the parts desk

8

Output Gear, 4th, 37T

Qty 1

Triumph has stock

$103.83

Order-in Ask the parts desk

9

Output Gear, 3rd, 37T

Qty 1

No longer supplied by Triumph → replaced by T1183395

No longer available

Not on our shelf Ask the parts desk

10

Shift Ring, 2nd/3rd Gear

Qty 1

Triumph has stock

$161.95

Order-in Ask the parts desk

11

Output Gear, 1st, 49T

Qty 1

Triumph’s Aug 21, 2026 date has passed, we’ll confirm

$113.23

On backorder Ask the parts desk

12

Thrust Washer, 35.5 x 43 x 1.5

Qty 2

Triumph has stock

$3.00

Order-in Ask the parts desk

13

Circlip, ID 32.2

Qty 2

No longer supplied by Triumph → replaced by T3502102

No longer available

Not on our shelf Ask the parts desk

14

Thrust Washer, 30.5 x 40 x 1.5

Qty 1

No longer supplied by Triumph → replaced by T1183555

No longer available

Not on our shelf Ask the parts desk

15

Plain Bush, Output, 3rd

Qty 2

No longer supplied by Triumph → replaced by T1183398

No longer available

Not on our shelf Ask the parts desk

16

Plain Bush, Output, 2nd

Qty 1

No longer supplied by Triumph → replaced by T1183399

No longer available

Not on our shelf Ask the parts desk

17

Bearing, Cyl Roll 22, 1 x 40 x 12

Qty 1

Triumph has stock

$54.55

Order-in Ask the parts desk

18

Sleeve Assy, Needle bearing

Qty 1

Triumph has stock

$58.98

Order-in Ask the parts desk

19

Seal, Oil 35 x 62 x 5

Qty 1

Triumph has stock

$22.78

Order-in Ask the parts desk

20

Thrust Washer, 25 x 35 x 1.0

Qty 1

Triumph has stock

$4.56

Order-in Ask the parts desk

21

Bearing, Needle, K25 x 32 x 16 V5

Qty 1

Low stock at Triumph

$16.45

Order-in Ask the parts desk

22

Nut, Gearbox Sprocket

Qty 1

Triumph has stock

$5.15

Order-in Ask the parts desk

23

Tab Washer, Sprocket

Qty 1

Triumph has stock

$25.81

Order-in Ask the parts desk

24

Sprocket, Front, 17T, 520

Qty 1

Triumph has stock

$34.73

Order-in Ask the parts desk

25

Screw, Cap/Hd, M6 x 16, Enc, Raw

Qty 2

Triumph has stock

$0.53

Order-in Ask the parts desk

26

Bearing Retainer Plate

Qty 1

Triumph has stock

$17.71

Order-in Ask the parts desk

27

Restrictor Washer, Gearbox

Qty 1

Triumph has stock

$7.52

Order-in Ask the parts desk

28

Circlip, EXT, 23.5 x 1.2

Qty 1

Triumph has stock

$4.04

Order-in Ask the parts desk

29

Bearing, Ball, 25 x 62 x 17

Qty 1

Triumph has stock

$184.79

Order-in Ask the parts desk

30

Spacer, Sprocket, Width 18.01

Qty 1

Triumph has stock

$12.66

Order-in Ask the parts desk

31

Qty 1

Triumph has stock

$8.01

Order-in Ask the parts desk

32

Qty 1

Triumph has stock

$3.32

Order-in Ask the parts desk

Diagram and part data from Triumph’s own parts catalogue. Prices and availability are a dated snapshot, not a reservation. Fitment is Triumph’s data — send us the last six of your VIN if you want it checked before you order.

Southern California Motorcycles, 515 W Lambert Rd, Brea, CA 92821 · 714-256-6700

Triumph supply checked Aug 5, 2026 · Brea shelf Aug 18, 2026.