I have a 1986 k75c it has sat for two years. When I tried to start it it did not start I took the fuel pump out and it was not working. I tapped the fuel pump a few times then it started to work. I Put everything back together the bike fired right up. It ran real well for about a block, then it started to bog down and act like it was going to die until I let the gas off then it would idle. I changed fuel filter then tried again. it did the same problem does anybody know what my problem could be.