| Diagram | Fig. 3 — CYLINDER BLOCK – PISTONS – CRANKSHAFT · ref 16 |
| Subsystem | engine bottom |
| Listed in parts books | 1973 |
MAIN BEARING SET (4) 3CYL .030 USA
Main bearing set of 4, .030 oversize, for the triple-cylinder engine.
Part number 70-9029 is a main bearing set for the triple-cylinder engine, machined .030 over standard size for a rebore or regrind job. The set covers all four main bearing positions on the crankshaft for the 3-cylinder motor.
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This is one of those parts you order when the crank has already been reground and you need bearings sized to match, rather than a stock replacement set. The .030 oversize designation means it's meant to pair with a crank that's had material removed at that stage, not a standard-size crank.
We don't have more detail on this one beyond the catalog listing. Call the shop and we'll confirm it's the right size and fit for your engine before you order.
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