Advice on fuel to use for 450r

Just do a 50/50 Mix with VP110. As for any fuel.... Make sure if your bike sits for months or weeks at a time go out once a week and start it up (even just a minute and it will be good) mainly to Keep the Fuel aggitated and dulute with new fuel everytime you ride.

If you are running stock compression I wouldn’t run any race gas. It’s completely false that raising your octane, when you don’t, need it, will give you more power. And the opposite is actually true. If you don’t need the octane, it can actually give you less power. Unless you are running high compression, there is no need to run high octane and you are literally just throwing money away. Now if you are running oxygenated fuels you can gain some power, but on such a mild motor like yours, it is not worth it. You’d be better off saving the money you would be spending on fuel and putting it towards other mods.

With that being said. I am running stock compression. Just to clarify. I read online that stock compression on these 450s is 12 to 1. Is this correct?

Yes, stock compression ratio is 12:1.