Question about 2007 BMW R 1200 RT

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I have a rattling sound from my burgman 400 k8. When i start the engine its nice and quite and when i ride below 4000rpm the engine is quite. But as the engine warms up and i get above 5000 there is a knocking or rattling sound coming from the engine. When i drop below 5000rpm the sound eases of. The engine sounds ok at stands till.I have taking it back to the dealier and he says that that the k8 engine is noiser then earlier models. I used to have a k5 burgman which did not sound like this. The bike has a 2 year warranty on and i have only done 1500 miles on it. The oil is ok.

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Change out the gas to a higher octane and do not use gas with ethanol. This sounds like engine knock > translated; pre-ignition of the fuel in the cylinder. This is not a good thing to have. It is hard on the crank and even harder on the piston. If the problem does not go away after a tank or two ask the dealer to check the engine timing. Also check gearbox oil level. Low oil creates heat and heat promotes detonation aka pre-ignition.

Posted on Mar 12, 2009

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I would try a fuel additive to clean the fuel system just in case as well as swapping for a higher octane fuel, plus I would buy a non supermarket brand... BP Shell etc. At 1500 miles I guess it’s not fully bedded in depending on riding style so there could be an issue with the newness of parts and the main agent should look into it if it’s a failing part, also being so new the engine will drink oil to some degree as it beds in, (BMW Boxer engines are also known for this).

Posted on Mar 03, 2010

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