Nice Chart eh! I did the Test and my take on it is that there is only so much HP to be Had from the Himalayan, Perhaps a Cam upgrade gives you 15 to 20 percent on a 411 ( though I doubt it will without more fuel ) My 477 has had a few mods so when the Tec Cam was installed it had already managed 28RWHP on the OEM cam and only got another 3HP Gain. What I am saying is most of my Gains are from the Displacement increase and I got a bit more with the Cam, overall My gains are about 9HP on a 22HP engine, not 50% but makes for a nicer Ride.
Tuesday 16th I am dyno testing a stock 411 with a H-T Cam and will post up the Chart, Im expecting 3 or 4 HP Gain.
Yeh, that was the best chart I could find of yours which compared the cams apples to apples. Same valve size, OEM head, and fueling I believe you said. The Tec cam did get 3.8 over the OEM in that test, which is the same amount Tec got so their results looked validated, at least performance increase wise.
For sure, the Himalayan only has so much, RPM being such a big factor and this being limited by the long stroke length. You don't see many crazy performance mods for a KLR 650 either which has a just slightly shorter stroke but still limiting it to about 6800 RPM. Both make big torque though.
I see you posted getting 22 HP on your stock bike which looks good compared to other dyno runs, motorcyclist magazine posted 21.8 as their dyno result and Hitchcock 21.5 at the wheel. I saw you had a few new cams to try out, I hope you find a winner and have then get the honor of experiencing the problems that Tec and Himalayan have in trying to supply demand for this quick and easy upgrade.
