SOHC.co.uk Forums > CB350/400
Hesitant revs below 3,000 RPM when hot.
Bradders:
Morning. Not had chance to do any of the suggestions as been away on holiday in Canada last couple of weeks, wall to wall Harley’s out there. K2-K6, could I run it without the filter for 20 miles to test or is that too long? The problem only seems to happen when the engine is hot.
Bryanj:
As long as there is no dust storm that should be ok
K2-K6:
Yes as Bryan says, ok to go without filter for that time.
It may be a good idea to use a vacuum cleaner inside the airbox when you take the filter out to remove any extraneous debris before you start it.
Northy:
--- Quote from: Chris whit on September 01, 2019, 09:40:32 PM ---Julie , they are set to 1, 3/4 turns , i have noticed that I don’t have to use much choke to start the bike from cold . I originally bought this set of reconditioned carbs from Gerben . Might try changing plugs and air filter.
--- End quote ---
They should be 2 turns (+/- 1/4 ) so close to standard but I'd screw then out a bit, try 1/4 at a time , so could be a easy fix.
Nurse Julie:
--- Quote from: Northy on September 02, 2019, 04:47:37 PM ---
--- Quote from: Chris whit on September 01, 2019, 09:40:32 PM ---Julie , they are set to 1, 3/4 turns , i have noticed that I don’t have to use much choke to start the bike from cold . I originally bought this set of reconditioned carbs from Gerben . Might try changing plugs and air filter.
--- End quote ---
They should be 2 turns (+/- 1/4 ) so close to standard but I'd screw then out a bit, try 1/4 at a time , so could be a easy fix.
--- End quote ---
Should be 2±½ on a CB400/4, which gives a little more leeway to fettle.I have mine set at....No 1, 2 ½ out, No's 2 & 3, 2 3/8 out and No.4 2 turns out. But every set of carbs will be slightly different.
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