| Also known as | E1575 |
| Diagram | Fig. 5 — CYLINDER BLOCK AND HEAD TR7RV · ref 53 |
| Subsystem | engine top |
| Listed in parts books | 1960–1962, 1964–1965, 1967–1974, 1976–1980, 1985 |
/ Thrust washer, 3 in.
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Part number 70-1575, also listed as E1575 in older parts books, is a thrust washer that sits in the rocker box area of the cylinder head, working with the rocker spindle. It shows up across a wide run of cylinder block and head figures in the catalog, spanning unit and pre-unit twin cylinder heads from the mid-1960s through the late 1970s, including TR6, TR6R, TR6C, 6T, T120, T140, and TR7RV listings.
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A thrust washer like this one takes up end play on the spindle so the rocker doesn't wear against the head casting or wander side to side under load. It's a small, easy to overlook part, but when it's missing or worn thin you can end up with excess play in the rocker assembly.
Given how many cylinder head figures this part number turns up in, it's worth checking your parts book figure against the exact head and rocker box you're working on before ordering, since small hardware like this can vary between models even when the figure titles look similar. Ed can help confirm fitment if you call the shop with your bike's details.
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