The 1991 VS1499GLP I am preparing has a problem and I am puzzled. I removed the oil filter and a little bit of dirty oil came out, less than a pint. The bike was sitting on a support to make it level and the front wheel was really high. I pulled the drain plug and nothing came out. I was going to install the battery anyhow so I jacked up the rear and put the old battery under the rear wheel, which made it level. STILL NO OIL came out. Here is the mystery---The oil on the dipstick is clean and appears full to the normal mark. ???? I have a raft bellows air pump. Tomorrow I will put a rubber stopper on the nozzle and put pressure on the dipstick hole and see what happens, and maybe on the drain hole. Ideas, guys?