Parts for Triumph, BSA & Norton·Worldwide shipping·Call the Shop: (657) 231-9003
Le Hangar 23
Shop/Category/Fig. 4 — CRANKSHAFT/Piston complete (9 to 1 ratio)
Piston complete (9 to 1 ratio)
View clickable diagram
Details
Also known as68-0434*, 68-434, 68-434*
DiagramFig. 4 — CRANKSHAFT · ref 31
Subsystemengine bottom
Listed in parts books1969–1970

Piston complete (9 to 1 ratio)

A complete 9 to 1 compression piston listed in the catalog for a single model year.

PN · 68-0434

This is a complete piston, listed at a 9 to 1 compression ratio, as it appears in the catalog under the crankshaft figure for a single model year. "Complete" in the parts books usually means the piston comes with its rings and gudgeon pin fitted, though our record here only confirms the compression ratio and doesn't spell out every item in the kit.

Read more

We don't have more detail on this one beyond the single catalog listing. The figure placement puts it in with crankshaft and bottom-end parts, which is typical of how piston entries get grouped, but we can't tell you bore size, which model it was fitted to, or how many you'd need without more to go on.

If you're chasing this one down for a rebuild, give us a call with your engine specs and we'll confirm fitment before you order.

BackorderAdd it to your cart — we'll source it and confirm the price before you pay.
Pin your bike to check this part fits.

Sorry if we got something wrong here. If you think this information isn't correct, .

Related parts
Piston ring — compression
PN 68-0256 · Usually replaced with this
BackorderView
Top piston ring
PN 68-0296 · Usually replaced with this
BackorderView
Gudgeon pin
PN 68-0263 · Goes with this
BackorderView
CIRCLIP,PISTON PIN BSA (71-3700 same)
PN 66-0954 · Goes with this
BackorderView
Piston scraper ring
PN 68-0299 · Usually replaced with this
BackorderView
Taper piston ring, centre
PN 68-0357 · Goes with this
BackorderView
Any questions about this part?

Ed is at the counter. Tell him what you're working on or what doesn't fit, and he'll take it from there with this part already on the bench.