Hello,
Things I have tried, to stop the engine hunting. please see image below.
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Things I have tried to stop hunting:-
#Red arrows: try changing the engine speed by 150 rpm, try the top and bottom holes. with care you can do this without pulling much apart, I use offset point nose pliers with the governor spring relaxed.

#Green arrow: Move the governor arm one spline on its shaft closer to the carby. To get the governor arm off, undo nut then spread slot with a flat tip driver(yellow arrow) then pry it off with a large flat tip from behind. To make it easier remove the governor plate (blue arrow) 2 x 10mm bolts from memory.

I bought a mower off an ex mowing contractor of 20 years, he used Suzuki's, he used to drill the jet out, I don't know the fine details.

Here are some other images for this thread.

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For those who haven't been in side one of these.

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Here are my 3, all mounted up on 21 inch Big Bob bases.

Last edited by mark electric; 11/01/14 09:58 PM.

Happy is he who penetrates the mystery of things.