SOHC.co.uk Forums > CB350/400
Really bad cold starting. Ign or fuel?
Sesman:
Sound news. Bit of a faff, but glad it worked out ok.
Johnny4428:
The 550 ones are the same, got to be the correct ones on the outside, with small tabs that seem to point inwards if correct, so 1 and 2 tabs pointing inwards to face each other and 3 and 4 facing each other. This way you know they are in the correct position and also you know they are not 180 degrees out.
I must add that these were replacement rubbers so can’t vouch for originals.
Sesman:
Apologies, was confused between carb inlets and inlet stubs.
PatM:
Im just going to add my tuppence-worth as mine does exactly this fault and ive never been able to find the reason behind it.
It will start like it did when it was brand new after its been running- but leave it a couple of hrs till it gets cold, and its a real bugger. its also running week on one pot, yet when I did a compression test, it was the same for all 4. Ive even tried another bank of carbs- and same problem.
Now, due to ill health and such personal reasons- Its not turned a wheel for nearly 3 years and I think the cam chain tensioner may be siexed- as the nut/bolt has been repalced at some time and loosening it has little effect. My fear is- snapping off bolt/studs- but my next move would be to tape the top cam cover off and check the cam-chain and horizontal mark to make sure its NOT a work cam-chain.
Sesman:
I’ve found in the past that old carb rubbers can be the cause of all sorts of running/starting problems.
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