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Cooling System

Triumph Bonneville Bobber · Cooling System · 34 parts · 4 on the shelf in Brea

Exploded parts diagram — Cooling System, Triumph Bonneville Bobber

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

Triumph lists this drawing for the Bonneville Bobber, VIN CM2397 and higher. Triumph builds more than one machine in this book and they do not all take the same parts. Tell us which one you ride →

Motorcycles this catalogue covers

Bobber
2017–2026
Bobber Black
2018–2020

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

Every part on this diagram

1
T2102261
Radiator
Qty 1
Backordered at Triumph · we’ll confirm the ship date after you order
$898.04
On backorder
2
T2102262
Fan, Radiator
Qty 1
Backordered at Triumph · we’ll confirm the ship date after you order
$445.69
On backorder Order through the parts desk
3
T3010702
Flanged Sleeve, 6.4 x 10 x 8.5
Qty 1
$5.35
Available
4
T3020153
Grommet, 13 x 3 x 10
Qty 3
$1.99
Available
5
T3205067
Bolt, HHF, Lghtd, M6 x 25, Slv
Qty 1
$2.27
Available
6
T2101296
Thermostat
Qty 1
Backordered at Triumph · expected Oct 23
$32.89
On backorder
7
T2100201
Seal, Thermostat
Qty 1
$6.61
In stock in Brea
8
T3205083
Bolt, HHF, Lghtd, M6 x 28, Slv
Qty 2
$2.29
Available
9
T2101256
Cover, Water Outlet, Short
Qty 1
$53.69
Available
10
T2101266
Coolant Manifold
Qty 1
$119.69
Available
11
T2101277
Sealing Ring, Coolant Manifold
Qty 1
Low stock at Triumph
$13.58
Limited availability Order through the parts desk
12
T3200134
Bolt, RHHF, M6x25, Encaps
Qty 5
$2.53
Available
13
T3000005
Dowel, Dia 6 x 16.5
Qty 2
$1.99
Available
14
T2101221
Pipe, Coolant
Qty 1
$27.46
Available
15
T3600124
O Ring, ID 21.5 x 3
Qty 4
$3.14
In stock in Brea
16
T2102008
T-Piece, Coolant Assy
Qty 1
$35.04
Available
17
T2101477
Hose, Coolant, Rad to Engine
Qty 1
Low stock at Triumph
$12.66
Limited availability
18
T3706215
Clamp, Constant Tension, Dia 30
Qty 4
$12.95
Available
19
T3706212
Clamp, Constant Tension, Dia 23
Qty 1
$12.95
Available
20
T2100879
Filler Neck, Coolant
Qty 1
Low stock at Triumph
$72.48
Limited availability Order through the parts desk
21
T3330627
Screw, Pan/HD, TPT, Tx, M5 x 12
Qty 2
$1.99
Available
22
T3350129
Nut, Captive, M5
Qty 2
Low stock at Triumph
$3.14
Limited availability
24
T3330958
Screw, But/Hd, M5 x 10, Blk, Enc
Qty 2
$1.99
In stock in Brea
25
T2101135
Expansion Tank, Coolant
Qty 1
Backordered at Triumph · we’ll confirm the ship date after you order
$88.00
On backorder Order through the parts desk
26
T2101136
Mount, Expansion Tank
Qty 1
$40.21
Available
27
T2101015
Cap, Expansion Tank
Qty 1
Low stock at Triumph
$1.99
Limited availability
28
T2101092
Hose, Expansion Tank, Coolant
Qty 1
Backordered at Triumph · we’ll confirm the ship date after you order
$10.66
On backorder
29
T2102555
Hose, Expansion, Overflow
Qty 1
$55.43
Available
30
T3350003
Locknut, Flanged, M6 x 1
Qty 2
$1.99
Available
31
T3700440
Clip, Hose, 11-12.5mm
Qty 2
$5.02
In stock in Brea
32
T3700190
Clip, Rear Brake Hose
Qty 3
$2.81
Available
33
T3205063
Bolt, HHF, Lghtd, M6 x 16, Slv
Qty 2
Low stock at Triumph
$3.24
Limited availability
34
T2100972
Filler Neck Bracket
Qty 1
Backordered at Triumph · we’ll confirm the ship date after you order
$8.62
On backorder Order through the parts desk
35
T4007777
Coolant, OAT, Premix, D2053,12 x 1L
Qty 1
Not illustrated
Low stock at Triumph
$173.26
Limited availability Order through 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 Oct 15, 2026.