| Also known as | E6890 |
| Diagram | Fig. 7 — INNER PRIMARY COVER — OIL PUMP · ref 46 |
| Subsystem | engine bottom |
| Listed in parts books | 1969–1973 |
ENGINE SPROCKET T140
Engine sprocket for the T140, drives the primary chain off the crankshaft.
70-6890 is the engine sprocket for the T140 line, the piece that mounts on the end of the crankshaft (or mainshaft, depending how you want to think about it) and drives the primary chain back to the clutch. It's a wear item that takes a lot of load every time the bike moves, so if yours is showing hooked or worn teeth, or the chain's been run loose for a while, this is one of the first places to check.
Read more
Our records on this one are thin beyond the basic listing, so treat this page as a starting point rather than the full story. If you're matching up an old part number or trying to confirm this is the right sprocket for your particular gearbox and chain setup, give us a call before you order and we'll sort out fitment together.
Sorry if we got something wrong here. If you think this information isn't correct, .