Honda FR800 Owner's Manual page 10

Operation on Slope
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When tilling on slopes, keep the fuel tank less than half full to
minimize fuel spillage.
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Till across the slope (at equally spaced intervals) rather than up and
down it.
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Be very careful when changing the direction of the tiller on a slope.
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Do not use the tiller on a slope of more than 10".
The maximum safe grade angle mentioned above is for reference
purpose only and should be determined according to the type of
attachments. Before starting the engine, check that the tiller is not
damaged and is in good condition. For your safety and safety of oth-
ers, exercise extreme care when using the tiller on a slope.
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