Piston Assy
T1120900 · Genuine Triumph
Triumph has stock
Listed for these motorcycles
America
2002–2016
Speedmaster 865
Choose your year
Bonneville T100
2008–2026
Bonneville T120
2016–2026
Bonneville T120 Black
2020–2026
Listed in Triumph’s parts catalogue for these motorcycles. Fitment is Triumph’s data, not a guarantee from us — add your motorcycle above and we check it against your frame number where Triumph splits the part.
Where it sits on the bike
Crankshaft, Conn Rods & Pistons
America · Cylinder Head, Valves, Pistons, Liners, Camshaft & Balancers · callout 9 · qty 2
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Crankshaft,Conn Rods & Pistons > Eng No 211132
Speedmaster · Cylinder Head, Valves, Pistons, Liners, Camshaft & Balancers · callout 9 · qty 2
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Crankshaft/Conn Rod and Pistons - Bonneville T100
Bonneville · Cylinder Head, Valves, Pistons, Liners, Camshaft & Balancers · callout 9 · qty 2
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Crankshaft/Conn Rod and Pistons - Bonneville
Bonneville · Cylinder Head, Valves, Pistons, Liners, Camshaft & Balancers · callout 9 · qty 2
View diagram →
Prices and availability are a dated snapshot, not a reservation — Triumph supply is read from Triumph’s catalogue and our shelf count is read from our own system. Both move. Triumph supply checked Aug 5, 2026 · Brea shelf Aug 18, 2026. Shipping and tax are calculated at checkout.
Genuine Triumph parts from Southern California Motorcycles, 515 W Lambert Rd, Brea, CA 92821 · 714-256-6700