I seem to have a lot of vaccum when I remove my gas cap. I didn't have this issue in the past as I hade a bad vent hose on the filler neck. I fixed when I dropped the tank & fixed my rear frame last winter. I removed the hose from the charcoal canister, took out the little orfice and blew in it with the gas cap off. I don't think I was doing anything. Should I be able to blow through the vent line for tank like this? Just thought I'd ask before taking more stuff apart and using the air compressor to find the blockage. Thanks for the help!
Anything is possible if you don't know what you are talking about.