a local guy is selling 1988 r80rt ex police.the clocks are showing 140k miles. i have not seen the bike but he assures me that all is well.he has owned it for 15 years and talks about it as if it was an old family friend.he has put the last 40k on the bike and in this time the only engine work carried out has been a clutch and routine servicing. SO should i be concerned about the mileage? what should i look for when inspecting the bike? what questions should i ask? i would be very grateful for any help or advise as this would be my first bmw.thanks ian.