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Front Forks and Yokes

If the last 6 of your VIN are 43509 or lower

Triumph Thunderbird & Thunderbird Sport · Front Forks & Yokes · 33 parts · 1 on the shelf in Brea

Exploded parts diagram — Front Forks and Yokes, Triumph Thunderbird & Thunderbird Sport

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

Motorcycles this catalogue covers

Thunderbird & Thunderbird Sport
1999

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

Every part on this diagram

1
T2045021
Stanchion assembly
Qty 1
LH
No longer supplied by Triumph
No longer available
Not on our shelf Ask the parts desk
2
T2045022
Stanchion assembly
Qty 1
RH
No date from Triumph yet
$950.61
On backorder Ask the parts desk
3
T2045040
Tube outer
Qty 1
LH
No longer supplied by Triumph
No longer available
Not on our shelf Ask the parts desk
3
T2045030
Tube outer
Qty 1
RH
Triumph’s Aug 14, 2026 date has passed, we’ll confirm
$554.50
On backorder Ask the parts desk
4
2040076-T0301
Sliding bush
Qty 2
Low stock at Triumph
$13.64
Order-in Ask the parts desk
5
2040077-T0301
Washer
Qty 2
No longer supplied by Triumph
No longer available
Not on our shelf Ask the parts desk
6
2040078-T0301
Oil seal
Qty 2
Triumph has stock
$19.44
Order-in Ask the parts desk
7
2040079-T0301
Ring snap
Qty 2
$6.33
In stock in Brea Ask the parts desk
8
2040080-T0301
Dust seal
Qty 2
Triumph has stock
$18.60
Order-in Ask the parts desk
9
2040160-T0301
Oil lock
Qty 2
Triumph has stock
$8.35
Order-in Ask the parts desk
10
2040171-T0301
Bearing
Qty 2
Triumph has stock
$6.61
Order-in Ask the parts desk
11
T2045042
Cylinder assembly
Qty 2
No longer supplied by Triumph
No longer available
Not on our shelf Ask the parts desk
12
2040172-T0301
Bearing
Qty 2
Triumph has stock
$9.15
Order-in Ask the parts desk
13
T2045041
Tube assembly
Qty 2
Inner
Triumph has stock
$302.81
Order-in Ask the parts desk
14
2042205-T0301
Spring
Qty 2
NO LONGER AVAILABLE
No longer supplied by Triumph
$79.52
Not on our shelf Ask the parts desk
15
T2045043
Guide spring
Qty 2
Triumph has stock
$10.49
Order-in Ask the parts desk
16
T2045044
Spacer
Qty 2
No longer supplied by Triumph
No longer available
Not on our shelf Ask the parts desk
17
T2040169
Cap, Fork
Qty 2
Triumph has stock
$75.69
Order-in Ask the parts desk
18
T2045046
Capscrew, Oil Lock
Qty 2
Triumph has stock
$9.85
Order-in Ask the parts desk
19
T2045045
Washer, Sealing B
Qty 2
Triumph has stock
$1.05
Order-in Ask the parts desk
20
T2045011
Yoke, Upper, Polished
Qty 1
Upper
No longer supplied by Triumph
No longer available
Not on our shelf Ask the parts desk
21
T2045025
Yoke
Qty 1
Lower
No longer supplied by Triumph
No longer available
Not on our shelf Ask the parts desk
22
T2045047
Capscrew
Qty 6
M8 x 25mm
Triumph has stock
$8.71
Order-in Ask the parts desk
23
T3450060
Cap
Qty 1
Triumph has stock
$1.30
Order-in Ask the parts desk
24
T2040061
Washer Upper Yoke
Qty 1
Triumph has stock
$6.61
Order-in Ask the parts desk
25
T2040060
Nut
Qty 1
Triumph has stock
$22.99
Order-in Ask the parts desk
26
T2040081
O Ring, Fork Seal
Qty 2
Triumph has stock
$3.32
Order-in Ask the parts desk
27
2040173-T0301
Seal kit
Qty 2
Triumph has stock
$32.81
Order-in Ask the parts desk
28
2040225-T0301
Adjuster nut
Qty 1
PART NO LONGER AVAILABLE
No longer supplied by Triumph
No longer available
Not on our shelf Ask the parts desk
29
T2140210
Adjuster Nut, Upper
Qty 1
Triumph has stock
$3.14
Order-in Ask the parts desk
30
T3450200
Plug, Caphead, Chrome
Qty 14
Triumph’s Aug 7, 2026 date has passed, we’ll confirm
$3.88
On backorder Ask the parts desk
31
T3450062
Plug, Plastic, Black
Qty 2
Triumph has stock
$1.30
Order-in Ask the parts desk
32
T3051032
Screw, Cap/HD, M8 x 40, Slv
Qty 4
Triumph has stock
$1.40
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.