SOHC.co.uk Forums > CB350/400

Carburettor Rebuild Time... Help!

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Drew400:
My four things of beauty are now all fastened together and I'm doing the final adjustments before putting to one side to await the engine rebuild. However, I have a question for you experts:

Should the throttle slide be all the way down at the bottom of of its tunnel? I seem to have a small gap at the bottom of c.3mm at its highest point (see photo). I can adjust them upwards (i.e. increase the gap) but nothing doing to close the gap entirely, hence this question.

Hopefully a wet bank holiday will find many of you, like me, in front of a computer and/or engine parts as I write!

Cheers and thank you,

D.

SteveD CB500K0:
There should be a gap (otherwise the bike would never tick over.

I always "knew" it was 1/8th" and used a drill bit to set it.

Not sure where I got that from or how authentic it is - but always worked for me.

Steve

Drew400:
Thank you Steve, you've put my mind at rest. I didn't remove the sliders from their arms when removing them from the car bodies and so I doubted I could have messed up their settings and was thus hoping for the the answer you have just sent!

Great, I can now crack on with more rebuild stuff!

Cheers,

D.

Clem2112:
Re the gap in the carb venturi...

When you eventually come to balance the carbs, about the last task after a re-build, this gap gets adjusted to equalise the vacuum reading for each cylinder.....  All that fun to come !

Drew400:
Can't wait, I think!

Thanks Clem.

D.

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