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Quick question, whats the standard inlet valve size on a YB?

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Old 25-10-2005, 12:50 AM
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Default Quick question, whats the standard inlet valve size on a YB?
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Old 25-10-2005, 01:03 AM
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23 or 24 think its 24 im proberly wrong tho
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Old 25-10-2005, 01:06 AM
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Cheers for the guess, i suspect you are wrong on that one though TBH

Gotta be a lot more than that surely for the inlets?
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Old 25-10-2005, 01:07 AM
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i thought the exhaust was 23 and the inlet 24
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Old 25-10-2005, 01:08 AM
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lol valve size i swore u meant ports lol well the ports are that im pretty sure
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Old 25-10-2005, 01:11 AM
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Sounds reasonable for the ports mate, but definately not the valves.

Was just after making a comparison to the 34mm ones ive just got for my mini, to see if they were bigger or smaller and by how much.

Not a huge amount of public domain knowledge about the LET engine, so i keep comparing various aspects of what im doing against a few other engines, the YB being one of them!
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Old 25-10-2005, 06:56 AM
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35mm inlet, 31 exhaust.
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Old 25-10-2005, 09:11 AM
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Ah nice one Martin, thanks very much
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