Yes you can just drill two small holes on inside part of cap,just into area where the ball bearing is at.polaris puts a tank vent on some sleds,in addition to a vented cap!!!Look at a 2013 550 shift part#7052464,7052362,7052208 and some tubing and drill a 9/16 hole in top of oil tank.Thats about $10 worth of parts.I drilled cap on every sled i own,also put this tank vent on one to try it .If you drill cap don't go thru the outside of cap.