Your Order

Nothing on the bench yet.

Start with the part number. The diagrams are the fastest way in.

Line items

SEARCH

ShopParts by Model Category

Popular CategoriesCarburettors & Intake Ignition & Electrical Engine · Top End Gearbox & Primary Wheels & Brakes Exhaust All categories

ToolsVIN DecoderEnter a frame, engine, or VIN to identify your Triumph, BSA, or Norton Crank Journal IdentifierMeasure your crankshaft journals to find the correct bearings Bore Spec FinderAnalyze cylinder bore measurements and find correct piston size Gear Ratio CalculatorExperiment with sprocket sizes and see the effect on speed and torque Technical SpecificationsComplete workshop spec sheets with torque values, oil capacities, and more

InformationTech SpecsIn-depth technical reference and workshop specs Shipping & ReturnsHow orders ship and how returns are handled Backorder PolicyHow backordered and special-order parts work

Parts for Triumph, BSA & Norton·Worldwide shipping·Call the Shop: (657) 231-9003

Home/PISTON BSA M20 +.020

LH23 Parts

PISTON BSA M20 +.020

$120.95

SKU JRCBSAM20/020

Vintage Triumph, BSA & Norton parts.
A working shop.

1281 Logan Ave Ste E
Costa Mesa, CA 92626
By appointment only
contact@lehangar23.com
(657) 231-9003

Shop

Support

Contact Us Shipping & Returns Tools & Information

Legal

Your Privacy Choices

© 2026 Le Hangar 23Costa Mesa, California