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« on: May 21, 2022, 12:10:46 PM »
I just saw this tag asking if I saw Rogers panthera run.
Roger's Panthera is in a Sundahl frame that was originally designed for a trx450r engine. He originally had the pipe that came from Panthera modified so it could be installed in the SRP chassis. He was unhappy with how this was performing. He sent the whole thing to Arlen who measured the port timings, and made a pipe to fit the frame. His cylinder isn't modified by Arlen, still the stock panthera porting, and he also runs a smaller carb because of space limitations. I believe it's a Keihin PWK bored out as much as possible.
I can only compare it to another friends quad which is a walsh chassis with a 430 puma in it running the newest piston / porting that LED offers with a LED puma pipe. This quad is running 14/34 and 14/36 gearing and a Mikuni TMX carb off a 2000 CR250.
The puma can keep up with the panthera and they are fairly equal for most of a run, but the Panthera is able to go faster than the puma and pulls away in high gear because of that. keep in mind, the rider of the Panthera is roughly 100lbs heavier than the rider on the puma, and runs huge desert tires which i feel is a lot more unsprung weight to spin too
Roger is happy with how the Panthera performs now, and isn't looking for any more power. He was told that there's more power that could easily be made by modifying the cylinder and head.
I hope this helps, it's not easy to compare these 2 machines with how different they are.