SOHC.co.uk Forums > CB350/400

Probably been asked a million times before.......

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Laverda Dave:
I know this may have been asked a million times before but after searching the carb threads I cannot find the answer I need. Here goes..... Does anyone know of position of the carb needles, Mr Haynes advises the third grove, I've done this but the bike is still a pig to start. I've got the carbs off for the third time now and going through them again.  History is they were stripped, ultrasonically cleaned, vapour blasted, new jets, gaskets, needles etc (Keyser kit) and carefully re-assembled. I even made a custom 21mm float height gauge as advised by Chris  :). To-date I have started the bike 3 times and every time its a nightmare, it just doesn't want to run, three of the headers have begun to yellow just through trying to set the carbs up, I haven't been on the road yet! The exhaust is a DS item and I'm aware of the potential for more fun and games regarding the back pressure  >:(
I'm going back to basics now, stripping the carbs again and using some carb cleaner to flush them out.
Any help or advice appreciated at this stage, I just want to get it MOT'd before winter!

hairygit:
With an aftermarket exhaust, it will almost certainly not run properly on standard jets/ needle settings. Are you running stock airbox/ filter? What make is the exhaust?

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Nurse Julie:
Mine are set on groove 3, original exhaust, stock air box etc.

Laverda Dave:
Thanks Julie.  Hairy, It's a DS item and everything else is stock.
I've just reset the floats again at 21mm and blown everything out. I've lapped the valves using solvol.
I'll try and set in up in the morning, lucky I'm on a week's holiday  :)

Nurse Julie:
It may be worth you talking to Paul Gledhill. He has a DSS exhaust and had a load of trouble getting the bike running right but, I know he did resolve it.......but I don't know how   :-[

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