I’ve been running the RK blue O ring chain on my leopards for 4 years and have yet to break one unless it got damaged, and even then, only once or twice. Some of my chains are 3 or 4 years old with many laps on them. Once the chain is heated up, there is much less friction than what you see when its cold. I’m sure the friction related HP loss on a Tag is negligible, perhaps less so with lower HP karts.
KartLift Kart Stands
DeepSeat Kart Seats
Don't bother PMing me, it doesn't work. Email is best: firstname.lastname@example.org.