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  1. S

    C400X engine failure

    I was riding my 2019 C400X when suddenly there was a loud clattering noise and a lot of blue/white smoke coming out of the tail pipe. The engine froze up and I had to have it towed to the dealer. Turns out it swallowed an exhaust valve. The problem was that the bearing for the rocker arm roller...
  2. S

    C400X clutch pulley failure

    I purchased a new C400X back in 2019. I have done all the recommend BMW servicings at the recommend mileages. At around 70,000 miles the CVT started making a noise like a wood chipper and I was losing power. I took the CVT cover off and didn't see anything obvious so I continued riding it until...
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