SOHC.co.uk Forums > CB350/400

Very bad running.

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Laverdaroo:
Ooo, underhand Shot from Stockport there


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Bradders:
Morning.  Have had a quick look at my bikes running problems. Started and switched off as suggested after 20 seconds and it appeared that 2 and especially 3 exhaust pipes were cooler than 1and4.
Changed the plugs but still the same, took off the points cover and started the bike again and the points for 2 and 3 are sparking like mad! Any ideas why that might be? Sorry my knowledge is very limited.

McCabe-Thiele (Ted):
What is the visual condition of your coil and leads at the coil under the tank?

Is there any sign of the outside of the leads being cracked especially where they exit the coils. You might see some arcing of the spark if it's dark enough or an absence of spark  at the plug end.

Bradders:
The coil leads look fine with no cracking or arching. Am I right in thinking a bad condenser could cause points arcing?

McCabe-Thiele (Ted):
Condensers are a magic little cylinder to me they can work perfectly  for years then suddenly fail or give trouble.

Apparently reliable new ones can be hard to find - others here will give you sources.

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