SOHC.co.uk Forums > CB350/400

I think the slides are in the wrong bodies

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kevski:
The amount of vacuum is not important as long as they are even, with regards to the slides adjust the height adjusters to the middle of their travel, then back off the tickover screw until iit s out of contact with operating lever, then check to see if slides are bottomed out, if bottomed out raise them using the tick over screw then bench set the heights evenly, then back off tickover screw until you can just about see light through carb throats, upon start up if tickover is racing back off idle screw, if this fails there is another problem , ie  choke plates not fully open, ignition timing, air leak on engine side.

Bryanj:
Something lurking in my adled brain tells me that the carbs are "handed" so if you have a total box of bits(still got the 400 ones to do comfy, need felts) and you mix the slides up it is possible to get them in wrong. I may well be wrong on that myself, would be glad for confirmation

Eldrick:

--- Quote from: Bryanj on September 19, 2022, 02:05:25 PM ---Something lurking in my adled brain tells me that the carbs are "handed" so if you have a total box of bits(still got the 400 ones to do comfy, need felts) and you mix the slides up it is possible to get them in wrong. I may well be wrong on that myself, would be glad for confirmation

--- End quote ---
Then I am just going to remove the carbs from the block and look. The education alone from removing and replacing them gives me more confidence in doing my own maintenance

McCabe-Thiele (Ted):
There are two part numbers for the actual slider bodies so I'm guessing two on the left & two for the right.

If you look into the carb body from the air cleaner side you should see the raised curve of the rear skirt of the sliders if the air intake is off - you might need a small mirror or use a phone to photo it.
 
The front skirt is flat on the engine side.

Cappodimonte:
Currently stripped down and rebuilding all four of my Carbs.
No 1 and 2 carbs have guide pin for slides on the LEFT
No 3 and 4 carbs have guide pin for slides on the RIGHT.

This Carb numbering is as you look down from the riding position on the seat facing forwards, the slides as you look at them have a flat front and a slight curve at the rear,
When attached to the engine by the carb attachment bar, the curve of the slides are what you should see looking out at you, NOT the flat side.
When setting them up on a bench the distance from the FLAT side of the slide to the inlet Venturi should be 1.5 mm.
Is the emulsion tube where the needle jet fits and slides up and down fitted the right way up ? It should protrude into the Venturi a small way,looking like a small ‘cup’ if fitted upside down it will not be seen.
When dealing with multi cards ALWAYS keep them in separate labelled boxes to prevent them being fitted from one carb to another.
See how it goes.

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