Hey Oyabun, I like the idea of 10 more horses from the cams and ECU. And I especially like the idea of keeping the low end power at par or even improving along with the increase in upper RPM power. Do you have a 'recipe' for this? And who does the ECU flash? What else needs to go with the cam and flash ? Any additional details that you would care to share would really be appreciated.
Other than the cam you'll need a service manual, quite bit of time if you do it firts, a lot of elbow grease, a few valve shims, a garage and tools. If you do your own maintenance and have done a valve check already it won't be a too difficult excercise.
On the CB the best supporting act goes to an MWR filter which allows to open a larger hole on the airbox. Interestingly it is not really the oem filtering element what is a restriction, but the snorkel and airbox entry - and it is not possible to enlarge those while still using the oem filtering. We found that a modified engine made 3 more hp on the dyno with the airbox lid removed compared to the oem setup. Apparently noone wants it's engine to breath unfiltered air on the street, but this area needs to be addressed.
I haven't specifically checked the Rebel air filtering solution, but google for "MWR air filter cbr500r" and you'll see how it is implemented for a start.
A better flowing exhaust will be also needed. Again, it is less about the silencer, but the oem cat and exhaust runners are the restriction. On the cb removing the cat from the oem exhaust brings quite a bit of torque already. Many of us uses the ixil cat less stainless exhaust headers as they are cost effective, come without a cat and have larger diameter downpipes than oem. Interesting that the +19 bikes also come with fatter exhaust headers and a larger, better flowing cat out of the factory.
The cams have no adjustable cam gears, so there's no easy way of timing them off from their factory settings. If someone wants to play tho a freezer and a hydraulic press always helps.
Regarding the ecu flash, first you'll need a flashing cable. You either buy one from Lonelec, or you can build your own fairly easy. Once you get that, or want to build your own cable - send me a PM and I'll help you to move forward.
I haven't seen the fuel and ignition tables out of a Rebel yet, assume that they are different from a CB as the Rebel airbox has different length intake velocity stacks for the two cylinders- this cam be serving three purposes. To have a bit more character of the engine, to widen the torque curve by tuning the harmonic frequency of the two cylinders to different frequencies - which also sacrifices some peak power, and to overcome an intake inefficiency what is caused by the 180° firing order of the engine. I don't think it would be a restriction, just means that a CB flash potentially could not be used directly to a Rebel engine.
Sorry for my typos, using a phone for forum posts.