MED PRIMARY GEAR THRUST WASHERS

Name: MED PRIMARY GEAR THRUST WASHERS
Brand: MED Engineering
SKU: MED-3115-TW
Price: 25.0 GBP
Availability: InStock

Part No: MED-3115-TW

£25.00 £20.83 EXC VAT

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Product variants

Availability: In Stock

Description

Exclusive to MED, a high quality phosphor bronze thrust washer, machined in four different thicknesses to give the correct primary gear end float on a 1275 crankshaft.

Available sizes

0.115"
0.118"
0.121"
0.124"

Please note, these will not suit the smaller 998/1098 crankshaft.

Supplied individually or as a set of four.

Frequently Asked Questions

What are these thrust washers for?

These phosphor bronze washers, or shims, are placed between the primary gear and the C-clip and washer on the 1275 classic Mini crankshaft. Different thicknesses are available to adjust the end float of the primary gear.

What end float should I aim for?

On a standard helical-cut primary gear, the factory recommended end float is 0.0035-0.0065". For full race use with straight-cut drop gears, we would open this up to 0.006-0.008".

How will I know which thrust washer to choose?

Dry build the engine and check the primary gear end float. If it needs adjustment, measure the existing thrust washer with a micrometer, and see how much thicker it will need to be to make up the correct end float. Or if you'd like a large range, we can also supply a complete set.

Is it vital to get the primary gear end float correct?

Yes, if it is too tight, when the engine gets up to temperature, the primary gear can bind up on the crankshaft and you will not be able to disengage the clutch. If it's all too loose, premature wear will occur.