| Also known as | E6868 |
| Diagram | Fig. 1 — CRANKSHAFT AND CONNECTING RODS · ref 13 |
| Subsystem | engine bottom |
| Listed in parts books | 1967–1968 |
PISTON COMPLETE 9:1 C.R.
A complete 9:1 compression ratio piston, listed under crankshaft and connecting rod parts, cataloged 1967-1968.
70-6868 is a complete piston listed at a 9:1 compression ratio, as recorded in the catalog under crankshaft and connecting rod figures. The old alias for this one was E6868, which is the number you'll find in earlier parts books before Triumph moved to the 70- prefix numbering.
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As a piston it's the reciprocating part that rides in the cylinder bore, connected down to the crank through the rod and pin, transferring the combustion pressure into rotating motion. "Complete" in the description usually points to it coming with its full complement of pin and circlips rather than the piston alone, though our record doesn't spell that out further.
Our catalog data ties this to appearances across 1967 and 1968, but it doesn't name a specific model. If you're matching this against your engine, check bore size and compression ratio against what's stamped or documented on your own cylinder before ordering, and give the shop a call if you want to confirm fitment.
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