| Diagram | Fig. 2 — Engine: Cylinder, Cylinder Head · ref 25 |
| Subsystem | engine top |
| Listed in parts books | 1975 |
Norton Plate, Compression
A Norton engine compression plate fitted between cylinder and head to set compression ratio.
This is a compression plate for a Norton engine, listed in the cylinder and cylinder head section of the parts books. A compression plate sits between the cylinder block and cylinder head (or in similar gasket-adjacent positions depending on the design) and is used to fine-tune the compression ratio of the motor.
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Our catalog record on this one is thin - it shows up once, tied to the 1975 model year, under the number 06-6591. Beyond that we don't have more detail on file.
If you're working on a Norton twin and trying to sort out compression ratio or head fitment, give us a call and we'll confirm this is the right plate for your engine before you order.
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