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I saw a full fat 172 leather Xenons normal 172 wheels no cup badges or no cup spoiler etc but it was listed as a cup, Hpid it and said cup aswell?? I found this on 2 172s now? Could be to ringers I guess
Both mine have always done this, I brought my 182 on 39k and it did it and it ls now on 80k and still works fine.
My cups on 38k and also does it.
I wouldnt worry.
Someone told me that bleeding the system might help but I don't no if this is true?
And I'm not sure how you do this.
Cheers
Kris