doing a bobber conversion on my v star and buying spares for paint job to keep all the stock parts. The a spare Tank I bought was a dragstar tank and has a vent on top of the tank underneath the speedo but my current tanks doesn't have the vent. I'm assuming my current gas cap is vented? can anybody tell me if pluging the vent on the dragstar tank and using my current(vented??) gas cap will do the trick? If not can anyone give me suggestions on what to do? thanks