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high speed needle does not change rpm

by larry mcchesney
(omaha nebraska)

High speed needle does not change amount of fuel entering carb nor change rpm. At high throtle I get around 14,000 rpm. When I turn needle out to increase fuel flow rpm does not change.

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Too lean on the LSN
by: Mike from Oz

G'day If the needle valve cannot make the engine run richer, then the low speed needle is probably tuned too lean. Try opening it half a turn. Then see if you can richen the needle valve now. If you still can't, go further on the LSN. I have bought a couple of second hand engines with exactly this problem.

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