Free shipping on qualifying gear orders $99+ • Easy returns

Contact 0 $0.00

Crankcases

Triumph Speed 400 · Crankcase, Engine Covers, Lubrication System · 34 parts

Exploded parts diagram — Crankcases, Triumph Speed 400

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

Motorcycles this catalogue covers

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

Every part on this diagram

1

Crankcase Assy, LH

Qty 1

When replacing crankcase both LH & RH sides should be ordered

Triumph has stock

$297.60

Order-in Ask the parts desk

2

Crankcase Assy, RH

Qty 1

When replacing crankcase both LH & RH sides should be ordered

Triumph has stock

$311.18

Order-in Ask the parts desk

3

Qty 1

Triumph has stock

$4.39

Order-in Ask the parts desk

4

Qty 1

Triumph has stock

$1.79

Order-in Ask the parts desk

5

Needle Roller Brg

Qty 1

Triumph has stock

$4.24

Order-in Ask the parts desk

6

Qty 1

Triumph has stock

$0.62

Order-in Ask the parts desk

7

Qty 3

Triumph has stock

$3.14

Order-in Ask the parts desk

8

Bolt, Flanged, M8 x 1.25 x 120, precoat

Qty 1

Triumph has stock

$0.84

Order-in Ask the parts desk

9

Bush Bimetallic

Qty 1

Triumph has stock

$5.49

Order-in Ask the parts desk

10

Pin Dowel Dia 14

Qty 1

Triumph has stock

$0.96

Order-in Ask the parts desk

13

Bearing Ball, 17 x 47 x 14 x 3L

Qty 1

Triumph has stock

$27.25

Order-in Ask the parts desk

14

Ball Bearing, 20 x 52 x 15

Qty 1

Triumph has stock

$15.84

Order-in Ask the parts desk

15

Qty 1

Triumph has stock

$15.84

Order-in Ask the parts desk

16

Bolt, Flanged, M6 x 1

Qty 4

Triumph has stock

$0.32

Order-in Ask the parts desk

17

Qty 1

Triumph has stock

$0.20

Order-in Ask the parts desk

18

Stopper, I/P Shaft Bearing

Qty 2

Triumph has stock

$1.05

Order-in Ask the parts desk

19

Qty 1

Triumph has stock

$1.97

Order-in Ask the parts desk

21

Qty 1

Triumph has stock

$2.72

Order-in Ask the parts desk

22

Joint, Breather Pipe

Qty 1

Triumph has stock

$4.67

Order-in Ask the parts desk

23

Qty 1

Triumph has stock

$1.47

Order-in Ask the parts desk

24

Bolt, Flanged, M5 x 0.8

Qty 1

Triumph has stock

$0.09

Order-in Ask the parts desk

25

Ball Bearing, 22 x 56 x 16

Qty 1

Triumph has stock

$30.91

Order-in Ask the parts desk

26

Stopper Bearing

Qty 2

Triumph has stock

$1.36

Order-in Ask the parts desk

27

Bearing Ball, 17 x 40 x 12 x 3

Qty 1

Triumph has stock

$22.99

Order-in Ask the parts desk

28

Qty 1

Triumph has stock

$7.84

Order-in Ask the parts desk

29

Qty 1

No date from Triumph yet

$0.09

On backorder Ask the parts desk

30

Window, Oil Gauge

Qty 1

Triumph has stock

$5.19

Order-in Ask the parts desk

31

Circlip, Internal

Qty 1

Triumph has stock

$0.53

Order-in Ask the parts desk

32

Qty 1

> A25050 OR > CB3897 depending on VIN Format

Triumph has stock

$13.38

Order-in Ask the parts desk

32

Qty 1

A25051 > OR CB3898 > depending on VIN Format

No date from Triumph yet

$13.38

On backorder Ask the parts desk

33

Screw, Pan Cross, M6 x 1

Qty 3

Not Illustrated

Triumph has stock

$0.38

Order-in Ask the parts desk

37

Bolt, Flanged, M6 x 80mm

Qty 3

Qty Query

Triumph has stock

$0.94

Order-in Ask the parts desk

38

Qty 1

Not Illustrated

Triumph has stock

$0.53

Order-in Ask the parts desk

40

Bolt, Flgd, M5 x 0.8 x 16, Precoat

Qty 2

Not Illustrated

Triumph has stock

$0.38

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.