SOHC.co.uk Forums > CB350/400

Carb adjustment limiter?

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Matt_Harrington:
I understand what the little plastic (?) adjuster limiter (that covers the mixture screw) does but every set of carbs I have seen seems to be missing them. Is there a reason or is it one of those things that the items are not necessary? Or get lost at service time and never replaced? Just a thought!
Matt

Nurse Julie:
Lost, not replaced as not necessary.

McCabe-Thiele (Ted):
Not essential but it does stop you turning the screw too far as it restricts the adjustment.

Bryanj:
Part of emmission regs need to be put in file 13 under B for bin

Cappodimonte:
The black caps were used for aesthetic reasons, in that plastic does not tarnish as the underlying brass screw would. The second reason was to dissuade owners who ‘tinkered’ with settings not to do so as removal of the cap could easily be seen and warranty voided.
The capping of adjustments was considered necessary by manufacturers as there were plenty of so called ‘Tuning Expert’s’ who’d fiddle about not knowing what they were doing and making things worse.
This I know from my Motor Vehicle days where a car would come in running badly, you’d fix the problem. Owner would take it away then come back the next day complaining it was worse than before. It was clear they’d buggered about with it so I took to painting any adjustment screws which would immediately show up if they’d been tampered with.
I’d confront customers who’d obviously deniy  it, so they’d either have to pay or take it away running badly, soon stopped them, yes I lost a few customers but I never lost sleep over it as they were wasting my time and my money.

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