What a beautiful straight line- gotta love long stroke engines! Very impressive work. It makes me wonder what scooterbob's cams alone would do for hp gains, unless the stock lifters can't handle the extra lift?
Yeah, these ARE are great motors ! And ScooterBob did some very nice work with the parts. Burned up a little cray matter on this one ! he..he..he. And hopefully we both have a few more wrinkles in the brain. That's an interesting thought on the Cams with a stock head........... Certainly the valve train geometry would be looked at. Clearance issues and such.....
I am sure SOME hydraulic lifters would work. I personally like solids for their consistency. BUT, Hydraulics have been used for years successfully in Cars and bikes for performance applications.
You would also have to address the changes in air flow through the intake, it's effect on the map sensor..... If any. Voltage readings the it's sending back to the ECU and etc. Basically a new map would likely be needed. etc.....etc.....etc. You can't just stick parts on..... intake, exhaust, Cams. And expect the stock ECU to adjust to these changes.... The ECU does have some learning in it, I believe. BUT to do it without thinking you will not have to make changes In the AFR's ?........... You may get away with it , with a filter or muffler? But modern bikes come pretty lean from the factory. So basically....... yeah, some things to look at.