problem is that there are no visible screws on either side of the bottom of the bike's seat like have seen on other bikes that were made more recently. to top it all off, have no bicycle store or repair shop around me, how do i i go about lowering the seat on this early 1980s Japanese bike if i cant fid any damn screws with which to do so?. The friend i bought this bike from has no idea hw to raise or lower the seat, as he has never had to because he is considerably taller than I and the guy he originally bought this bike from about 6-7 years ago was exactly his height. but, because i am 5'2 and my friend is 5'10 i really need to lower the seat or i wont be able to ride it. If you have any wise ideas on how i could fix this, please let me know!!