| Also known as | E9974 |
| Diagram | Fig. 2 — CRANKCASE · ref 97 |
| Subsystem | engine bottom |
| Listed in parts books | 1970–1971 |
Main bearing (roller bearing)
A crankcase roller main bearing supporting the crankshaft, also known under the older E9974 number.
70-9974 is a roller-type main bearing that lives in the crankcase, supporting the crankshaft as it spins. The parts book lists it under the CRANKCASE figure, and it's also known by the earlier E9974 number if you're working from an older parts list.
Read more
As a roller main bearing, it's built to carry the radial loads the crankshaft puts on the case, letting the shaft turn smoothly without excess play or wear building up at that journal. These wear over time and get checked whenever a case is split for a rebuild or a crank inspection.
Our catalog record ties this one to appearances in 1970-1971, but doesn't spell out which specific model it's for beyond that. If you're sourcing this for a rebuild, check it against your crankcase or give us a call and we'll help confirm fitment before you order.
Sorry if we got something wrong here. If you think this information isn't correct, .