Gasket Kit, Cylinder Head
Triumph Bonneville · Service Tools, Literature & Touch-Up Paint · 19 parts · 11 on the shelf in Brea
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 T120, Bonneville T120 Diamond, Bonneville T120 Bud Ekins, Bonneville T120 Black, Bonneville T120 Ace, Bonneville T100, Bonneville T100 Bud Ekins, Bonneville T100 BLACK, Bonneville T120 Black DGR LE, Bonneville T120 Elvis Edition.
Triumph builds more than one machine in this book and they do not all take the same parts.
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Motorcycles this catalogue covers
Bonneville T100
2008–2026
Bonneville T120
2016–2026
Bonneville T120 Black
2020–2026
Bonneville T100 Black
2017–2020
Our parts team checks fitment against your motorcycle before any order ships.
Every part on this diagram
1
T3990142
Gasket Kit, Cyl Head
Qty 1
COMPRISES FOLLOWING PARTS:
Backordered at Triumph · we’ll confirm the ship date after you order
$516.55
On backorder
—
T3558989
Washer, Sealing, 14.4 x 23 x 3
Qty 1
Sump Section - Part only available as multipack, T3551092
$1.99
Available
—
$5.02
Limited availability
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.