Question about 2001 BMW F 650 GS

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2002 BMW F650 GS DAKAR TWIN SPARK - ENGINE "PINKING"

Once warmed up and during quick acceleration I am getting a "pinking" sound from the motor, gradual acceleration does not cause this? It sounds like the ignition timing is too advanced, is this possible? No mechanical work has been carried out on the bike, bar a general service with plugs and brake pads changed. The plugs were only changed to try and correct the "pinking"- No change except a slightly smoother idle though. The bike got quite warm, throwing some coolant from the expansion bottle on her last run due to heavy sand prior to the noise becoming apparent - Could this be the cause? other Bm's did the same and seem fine. I have checked the cooling sysyem and there is no sign of pressurising. I'm stumped, please help.

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  • brentquincey Jan 22, 2009

    It is suggested that the fuel we receive is around 93 octane.

  • Tom Diffin May 11, 2010

    what octane fuel are you using might not be high enough to stop the pinging*( *detonation or pinging is the firing of the fuel to soon (do to high cylnder temptures) low octane fuel burns faster high octane burns slower

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G'day Brent,
email Gareth Morgan at gareth@garethmorgan.com  he rode a 650 GS from Europe to China and experienced running on some very low octane fuel  ( 87) in central Europe .
Cheers Derkomeister 












































Posted on Jan 23, 2009

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