125-200cc 2008 CR 125/167 Questions

I'm buying an 08 CR125 that has a 167 kit in it for myself (not the kids, ha,ha) and have some questions regarding the time or distance that I have with a tank of gas.
I realize that it is an estimate only as the kit, plus terrain, plus riding style, etc come into play.
What size is the tank? In gallons prefered.
Does someone make a larger tank for it?
Will an 07 WR tank fit? I believe my son's 07 WR's are 2.3 gallon.
Anyone make a battery powered light kit to make it enduro legal?
I'm stoked to be buying a modern bike after racing only vintage for so long. Can't wait till spring!
Thanks guys!

The 08 CR125 has a 2.5 gallon gas tank. I have one in 144 trim and it's a ton of fun. Congrats and you are gonna be in for a treat. Enjoy!

Thanks for the reply! I'm so glad to hear that, my sons bikes can make an easy course Hare Scrambles two hours without gas.
That means that I should make it too. Sweet!

You are welcome and I look forward to reading your ride report,