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Engine Knock when warm

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K2-K6:
They never usually come on at tickover,  needs more investigation as to what's happening with the oil pressure.

Is the oil new?

MalD:

--- Quote from: K2-K6 on October 11, 2017, 08:42:44 PM ---They never usually come on at tickover,  needs more investigation as to what's happening with the oil pressure.

Is the oil new?

--- End quote ---
Not sure of the age of the oil, hopefully change the oil this weekend and see how it goes. Anyone using different oil on these?


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MrDavo:
Examine the oil that comes out carefully for 'glitter' catching the light. That's how I knew my main bearing shells were borked having gone through the oil light, knock and denial stages.

K2-K6:
Definitely change the oil and filter. If you are uncertain of its origins and age it's probably one of the best things you can do for one of these.

It's not a magic bullet in fixing something like this but you just can't assess it thoroughly without being confident of oil condition, they live on new oil and I'd not run it further without replacement.

They don't need anything special, just 10/40 mineral oil is standard but if it's been started and stopped frequently without much of a run to get miles on it then the oil gets diluted by excess unburnt fuel from using choke. This results in a viscosity reduction that is not good at all for plain bearings.

MalD:
Thanks for the advice. The bike hasn’t been run a lot so the diluted oil could well be the case!! I shall be scanning that old oil for metallic objects and keeping finger crossed 🤞


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