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Shop/Category/Fig. 1 — CRANKSHAFT AND CONNECTING RODS/CRANKSHAFT AND FLYWHEEL ASSEMBLY
CRANKSHAFT AND FLYWHEEL ASSEMBLY
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Also known asE3996
DiagramFig. 1 — CRANKSHAFT AND CONNECTING RODS · ref 1
Subsystemengine bottom
Listed in parts books1964

CRANKSHAFT AND FLYWHEEL ASSEMBLY

Complete crankshaft and flywheel assembly for the engine bottom end, PN 70-3996 (also E3996).

PN · 70-3996

This is the crankshaft and flywheel assembly, listed under part number 70-3996 (also shown as E3996 in older parts books). It's the complete rotating assembly at the heart of the engine's bottom end, where the connecting rods attach and the whole thing spins to turn piston motion into the drive that eventually gets to the gearbox and rear wheel.

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The catalog entry we have on this one is brief, coming from a single appearance in a 1964 parts listing under the CRANKSHAFT AND CONNECTING RODS figure. We don't have more detail on this one beyond that it's a Triumph assembly for the engine bottom end.

Given how specific and central a part like this is, don't order on a guess. Call the shop and we'll confirm fitment against your engine before you buy.

Not listed anywhere

We've never carried this one. Tell us what you're after and we'll go looking — you'll get a price and photos before you commit to anything.

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Related parts
Flywheel
PN 70-3712 · Goes with this
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CONNECTING ROD
PN 70-4001 · Goes with this
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Bearing adjuster nut
PN 70-0398 · Goes with this
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Flywheel bolt
PN 70-3713 · Goes with this
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CRANK KEY TIMING PINION
PN 70-1580 · Goes with this
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Big end bearing (available in ·010 and ·020 undersizes)
PN 70-3706 · Goes with this
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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.