hi again,i was wondering about the rear suspension.i have an 83 venture with the manual air valve.i have been reading about the air pressure,different people ride with different air pressure.i was checking the bike and it seem to not have any air in the rear.i can tell when i get on it, it seem to be low.i hear it squeak like its all the way down on the shock i guess.i want to try to put air in it but not to much to hurt anything.i put a little in the front and i could see it rise real fast.i was wondering about the back.the wife wants to ride and i dont want her first ride to be bumpy and bottoming out.