The battery will be, courtesy of the Bikesponsors.com people. I'll put the order in next month or so. The draw on it from a nitrous system is minimal, you won't notice it. It's not like the race cars, snowmobiles, and drag bikes that don't have charging systems. I've never had to put a charger on a bike with a charging system between rounds. If your constantly running an on-board compressor to refill your air tank, that might change the equation. I can't tell you on that one, I don't nor have ever used one. So hopefully someone will pop in with the answer to that one.
unk:
As for the Air shifter, You'll see between 90-100 shifts per 4 oz, CO2 tank and around 180-200ish with a 9oz tank. I don't have much in the air system at all. The expansion chamber gives the system it's air.
There is a chance of pumping liquid CO2 through the system, messing up the shifts. This helps eliminate that issue. The small regulator works nice to take down the 700+psi to a manageable 125
You can also carry a smaller CO2 bottle to fill the shifter from. A 20oz CO2 bottle to siphon from will net you between 420-490 shifts. I don't know to many people who have made close to 100 passes in a weekend.
The nitrous, With a 20oz tank, your going to burn through about 65% of the tank on a 60hp shot, with a 40 shot your looking at about 2 passes. If you put a regulator on the bottle, it's possible to squeak out a third pass. It all depends on how much you have in the bottle to start with. I've seen people put an extra 5-10 oz or so, in a regulated bottle. It's nothing I would do, last thing you want is to pop the pressure disk. At the track or for a dash for cash, I wouldn't risk it. Just bring a couple of bottles and a mother bottle to refill from and You'll be good to go. This is where the turbo argument "You have to carry all those bottles" is always made. I don't think I've ever had to bring more than 4 bottles including the mother bottle with me, so IMO the need to carry a couple 4 or 5 bottles with you really isn't that big of deal. They don't take up that much room in the trailer or the truck. When I ran the XS at the track I used a 10lb mother bottle and 2-2.5 lb bottles and that system was a dual stage setup, the key was to always have a bottle full.
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