Thanks, Ed. A few more pictures are shown. Anyone who wants over 100 horsepower from one of these will probably need to do something similar. Hopefully this info be useful.
The anti-gravity battery is lithium ion based and it is made here in the US. They are rated by cell number with 4 cells being the smallest and 24 cells the biggest. A 12 cell one is used in this 1000cc bike. It is rated up to 1200cc for street/dirt and up to 1500cc for race use. The batteries come in small and large case versions. The small case one is shown here and it is tinier than the OEM lead acid battery. The large case version is the same size as the conventional one. All are much, much lighter than the lead acid ones. A large case model is what I use in the street bike and this small case one is for the race scoot.
These batteries operate with a 13.2 volt normal charge. The charging system and the rest of the electrics need to be able to deal with this weirdness. The street Bonneville is fuel injected and it has no problems using a lithium battery in spite of the vast amount of complex electronics on it. Not all bikes can do this and it is a good idea to do some research before installing one. I do not expect any problems with use on the much simpler race bike.
Our drills, sawzalls, and other tools that use lithium batteries can discharge them and we recharge them with no problem. These cells are different and discharged to below 10.5 volts can damage them. Care is needed with total loss systems to avoid this. These batteries are not made for deep cycle use. Also, a special battery charger is needed.
The last picture shows the little battery in the frame. The back side of the battery case is the back fender so there is no way I can move it any closer to the rear.