SOHC.co.uk Forums > CB350/400

Won’t rev above 3k under load

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Oggers:
Perhaps fuel starvation if mix and choke are OK. Easy thing first - get some carb cleaner in there - then test. Otherwise, check float needles are not sticking and main jets are clear. Crud may have got in there over the months. Your throttle can actuate the carbs to fully open n'est ce pas?

mickwinf:
I had a similar problem with a 550 and it drove me crazy, would rev ok on the stand but when riding would get to 4000 rpm and go flat. after many weeks stripping carbs and loads of different ideas i found one of the little spring loaded pins on the float needle was bent, so swapped it and problem solved!

Golfcarmad:
Thank you one and all for advice and suggestions.due to fine weather been riding the 1100 and hiding from the 400/4.
In a couple of days I will strip down carbs yet again and try all suggestions.
Thank you
Paul

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