SOHC.co.uk Forums > CB350/400

Carbs off bike - Total disassembly or not?

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McCabe-Thiele (Ted):
I agree with K2-K6 - mine were bench synched no vacuum gauges runs just fine,

Oddjob:
I see no harm at all in checking with a set of gauges, takes a few minutes and gives you peace of mind and of course if you do find them out at least you can alter them.

To me it's like checking the timing with a strobe, even though you've just set them up by eye, they should be right, but in practice they very rarely are.

K2-K6:
Gauges and strobe are different methods, not directly comparable.

Strobe just flashes at point the system is active, analysis is the accuracy of markings on A & R mech and the TDC mark in relation to true top dead centre. The strobe "measures" nothing, it just shows you the position under dynamics of the engine and ignition system running.

Gauges on the other hand, have to be balanced,  calibrated (ideally against a std reference) to be of any use. There's likely more inaccuracies in them, or potentially,  than just doing a mechanical bench sync. they dont hold the upper hand in technical reference, just convenience. If you've a good set  ;D

Oddjob:
I have a good set, brand new and as good as the Honda gauges I used back in the day.

Wasn't meant to be a comparison Nigel, it's saying, why not, what harm can it do?

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