| Also known as | E9490 |
| Diagram | Fig. 1 — CRANKSHAFT AND CONNECTING RODS · ref 2 |
| Subsystem | engine bottom |
| Listed in parts books | 1969–1970, 1974 |
Crankshaft
The main engine crankshaft listed under CRANKSHAFT AND CONNECTING RODS, appearing in catalog records from 1969 to 1974.
70-9490 is the crankshaft listed in the parts books under the CRANKSHAFT AND CONNECTING RODS figure. It's the main rotating shaft in the bottom half of the engine, carrying the connecting rods and taking the power from the pistons down to the primary drive. This is the older number for the part; you'll also see it turn up as E9490 in some records, which is the same physical piece under an earlier catalog form.
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The catalog record shows this part across appearances from 1969 through 1974, which tells you the years it was listed but not which specific model or engine size it belongs to. Before you order, it's worth checking your engine casings and rod set against what's on the bike now, since crankshafts are line-specific and not something you want to guess on.
If you're rebuilding the bottom end, this is a part where fit and balance matter, so give the shop a call and we'll help confirm it's the right one for your engine before it ships.
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