Honda-SOHC
SOHC.co.uk Forums => CB500/550 => Topic started by: davidrsmith on July 09, 2017, 06:43:42 PM
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Hi
I have now put the carbs back on the bike, from the advice given before I have replaced the main jets, the slow running jets and the float valves. I haven't replaced the needle valves though.
I set the float heights to 14mm as described in a PD46A overhaul document I found on line.
I started the bike on the choke and over the next minute or closed the choke and the bike ticked over at about 1000 rpm. When I opened the throttle the bike cut out. I restarted the bike (without the choke) and it raced up to 3800 rpm and stayed there. Everytime I started the bike after this the engine raced up to 3800 rpm and stayed there.
I have the carb to air filter connector attached but no air filter.
Can anyone give me any advice before I rip the carbs out and strip them down again?
Many thanks
Dave
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Have you tried adjusting the idle speed with the idle screw?
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Hi,
Yes, the throttle idle screw for all four carbs is backed right off until it has no effect.
The individual idle screws are set to one and a half turns.
I suspect there are two problems here, but any ideas would be welcome.
Dave
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Have you got any slack in the throttle cables?
Do the carb's have the choke cable going to handlebar, if so, again is there slack there when closed?
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If you set the slide heights to a slide that was slightly open they wont close properly