Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Q-jet primary jet number ???
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Old 08-11-2006, 10:02 AM
onovakind67 onovakind67 is offline
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A reasonable 'rule of thumb' is to use a jet that's about .030" larger than the metering rod. For a 42 rod use a 72 jet, etc. This will get you in the ballpark. Here's a page that lists some sizes:

http://peterpam.customer.netspace.net.au/quad.htm
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