Triton jr

If that's what you currently have Don't be afraid to run it, If you have to buy a chassis I'd take a different route, unless it's a good deal !
Would a triton jr be a good chassis for an adult to run is stock predator 375 class

I think you'll be very happy with that kart (especially on soft sidewall Burris tires and the power of a Predator engine.)
Assuming you're running at Ashway and Dumplin. :)

Give us a call if we can help. We've got a great Burris tire and prep program.

Thanks and God bless,
Brian Carlson
Carlson Racing Engines
Vector Cutz
Carlson Motorsports on Facebook
30 years of service to the karting industry
Linden, IN