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Old Feb 17, 2004 | 05:41 PM
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Guinnless
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From: Lancashire
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Personal experience Rich.
When set with the normal half hole preload and the Amal valve unplugged (electrically) this is what boost I've found they hold.

My -34 will hold 18psi without the aid of the Amal valve on normal preload.

The standard is a -18 IIRC. -17s are a touch stronger.

Does that clear things up a bit?
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