Ported Tri-z 250 makes light work of a CT Racing 350r

We were climbing a very steep local hill called "Sandy Buttcrack" and my buddy went to make his first pass at it. I followed at a modest distance, but once we started the steepest part, I easily closed the gap at an alarming pace. Knowing that if I backed off then, I would not recover enough momentum to continue, so I just stayed on the pipe and started to go around. I found a new line and still beat him over the hardest part. The whole ride was pretty much went like this all afternoon.
To his credit though, I later found he had 7 or 8 pounds of air in his rear tires. I know he would've done a lot better with 3 or 4 pounds. Still, THIS Tri-Z is stupid fast, and pulls hard through all the gears. Has wild port work from "SCOTTS" back in the day, and was flow-benched at burbank yamaha, running on 91 pump gas, a wiseco piston on its second bore, and still running the stock air intake, finished with a tuned DG exhaust. Rear tires are a good old set of dunlop kt355's. Also has a custom, one-of-a-kind works rear shock, forks and rear shock sprung and valved for a 250lb rider, and TI-MOLY sidewinder sprockets and chain from Krause racing.