| Diagram | CYLINDER BLOCK AND HEAD, 6T AND TR6 |
| Subsystem | engine top |
| Listed in parts books | Not catalogued by year yet |
Split cotter
A split cotter for the valve spring retainer, listed under the cylinder block and head figure for the 6T and TR6.
This is a split cotter, the small tapered locking piece that seats a valve spring retainer onto the valve stem so the spring can do its job without the valve dropping into the cylinder. The catalog places it under the CYLINDER BLOCK AND HEAD figure for the 6T and TR6, so it's a top-end engine part, not something you run into anywhere else on the bike.
Read more
These cotters work in pairs on each valve, wedged into the retainer's tapered bore to hold everything captive against spring pressure. They're small, they're cheap to overlook, and a worn or improperly seated one is a common cause of a dropped valve, so if you're doing head work it's worth inspecting them closely rather than reusing questionable ones.
Our record on this one is brief - it only shows up in a single catalog listing tied to the 6T and TR6. If you're not sure this is the right cotter for what you're working on, give us a call and we'll confirm before you order.
Sorry if we got something wrong here. If you think this information isn't correct, .