SOHC.co.uk Forums > CB500/550

Running on three

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gary123:
The initial start up on of my 500/4 went well, firing on all 4 but running a bit rough and petrol dripping from an overflow pipe. So I took carbs of and double checked float height's again.
Dont know why but one was way off (3). Replaced carbs, air box etc inc new filter and now No 3 wont fire at all.
If I take the air box off and put my hand over No 3 intake it strikes up till I take my hand away, do you think this is still a float height issue.

Ive double checked tappets, points, timing, plugs and leads.

mickwinf:
possible blocked idle passages or air leak?

K2-K6:
Sounds initially like the idle circuit jet is not flowing fuel on that carb from your description.

When you put your hand over intake it should just draw fuell through the main jet as that's it's only route to fuel, if that makes sense.

If you've got any easy start to spray down that csrb when running to see if it'll also chime in, this would confirm it's a lack of fuel through that idoe circuit too and give you a double/cross check.

K2-K6:
Crossed over with Mick there, both thinking along same lines though.

gary123:
Cheers guys, Ill get the easy start out the shed.

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