:thumbsup: Looks like a nearly complete bike to start with.
That Predator does seem to be the choice engine to go with judging from other member's projects here and elsewhere. Replacing the 6" tires should not be a problem with the abundant choices available for that size. I'm looking for some 8" replacements for the wheels I have...not too many choices there for a mini-bike.
Good luck with the build and take lots of pictures to share of your progress. :grind: