SOHC.co.uk Forums > CB350/400
Still carb troubles
Oddjob:
That's concerning regarding the pipe blowing off the adapter. Does it sound like it's popping back down the carbs?
Don't do a bench sync if you have gauges, Number 1 pipe not being hot could be low float height or that carbs throttle slide is so low it's not getting enough fuel.
Did you manage to get the gauges to level or did you stop when the engine stopped? Maybe try winding number 1 adjuster half a turn upwards.
billdn:
Just tried again, wound #1 slider out a bit. Started but #1 bar doesn't even show on scale ,#2 rises a bit as adjusting the others. #3 bar shot to the top and #2 pipe popped off again with a distinctive pop sound but doesn't sound like a backfire. 3 and 4 nearly achieve adjustment but 2 and 1 not having it.
Oddjob:
If you have a compression gauge I'd test the cylinders. Especially number 2
billdn:
No don't have one, probably could borrow one. The engine has been rebuilt from bottom up, rebore, new pistons, rings, timing chain, primary chain, valves etc surely shouldn't be compression problem.
You've far more experience than me so not saying your wrong, if so what's caused/causing it?
Before I switched to the Boyer I did get a good balance onbtge carbs but still wouldn't shut down when approaching giveaways etc.
Took them off, bench sync again , refitted added Boyer and now still same problem. Driving me 🤪.
billdn:
--- Quote from: K2-K6 on September 05, 2023, 11:38:51 AM ---If you want another "pair of eyes" to help out with it Bill, I could have a day walkabout to see if we can get our heads around it together.
Which area are you located in West Sussex ?
Offer on the table should you need it.
--- End quote ---
Cheers gave sent you PM 👍
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