I use a SW-Motech Bags Connection City Tank Bag. I mount it on my tank using a locking ring assembly. They offer an electric locking ring setup which cost even more coin. I opted for the nonelectric setup to reduce issues with the electrical connection which I have heard of some ppl having. The bag is high quality and comes with a raincover. It also has an holder which mounts to the front of the bag which I mount my GPS unit in. The holder is waterproof so I can use a standard GPS. The only issue with this is that I cant hear the GPS which is ok since Im on a motorcycle anyway. The bag holds a fair amount of stuff like my pistol, cellphone, tire gauge, garage door opener, water bottle, glasses, gloves and wipes with still more room etc. I ran a power line from my fuseblock to my handlebars and from that I have a connection that I make to the bag. The bag has a port that you can run a cable into and I have never had any issues with water intrusion despite riding in some gully washer type downpours. They also have a mapholder that you can get that will hold your map for easy viewing. I have handlebar risers and I have not hand any issues with the bag interfering with handlebar movement in any way. I chose this bag for it allows me to remove both my GPS and my tank bag in one easy movement. The bag is sold at twisted throttle and there u will find all the info about fit etc. Inside the bag I utilized a cigarette lighter type of connection with that splits into two connections, one for my gps, the other for charging my cellphone. If you really want to carry a lot of stuff there are other bags that can do that but I didn't want that large of a bag on my tank. Just personal preference. If you do chose to go with the locking ring mounting, be sure that the bag is securely engaged on the ring. I didn't do that one time and took off and the bag would have hit the pavement if it wasn't for my power cable preventing it from doing so. Takes a few tries to get the hang of it but now I never go anywhere without that bag. I considered the Yamaha bag but since I couldn't get on in time for a trip I went with the City bag. The bag doesn't rest on the tank so there is no concern of paint damage. I saw a Yamaha bag later on and it is a good quality bag for much less coin and the magnets are strong and it can hold everything but the kitchen sink. I hope this helps