SOHC.co.uk Forums > CB350/400

CARB JETS

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mike the bike:
Make sure you've got fresh juice in it.  Modern juice goes off after a couple of months and the engine won't pull the skin off a rice pudding.

paul G:

--- Quote from: mike the bike on March 27, 2017, 06:22:33 PM ---Make sure you've got fresh juice in it.  Modern juice goes off after a couple of months and the engine won't pull the skin off a rice pudding.

--- End quote ---
Fresh that morning Mike.
It's just down to the crap silencer, I bought it last summer or I would be back on the phone to them.

andut:
You could always try raising the needle a notch or 2, and you can get fine metric drills if you have spare jets available to increase in 0.05 increments.

paul G:
Stripped the carbs down and went up a size on the jets.
80 main and 45 on the slow jets.
Double checked the float levels and new rubbers all round.
Took it out for a quick spin and it bogs down on initial acceleration but then pulls like a train.
Didn't go far enough to check the plug colour or do a chop.
What do you think rich or weak. ;)

andut:
Paul, if it's initial accel, try adjusting idle mixture screws maybe 1/2 turn at a time and see if it makes a difference - should give you an indication of rich / lean and a damn sight easier that pulling the carbs on and off which gets pretty tedious if you're chasing carb settings !

Andy

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