12-06-2015, 04:50 PM
Me too. Absolutely no internal engine mods available from my observations. This may be the nefarious side effect of stringent emissions regulations in the countries the CB was introduced into first, and weak aftermarket support especially here in the US, where the bike thus far has only had a two year run. Consider however, that there are many other bikes in the same displacement category where high revs and max horsepower output happen at the 9,500-13,000 rpm range... those bikes are supersport models, a category that the CB has nothing in common with aside from the number of cylinders. It's not that kind of motorcycle.
Any extensive engine mods will likely require changes to the fuel injection and ignition mapping, perhaps a custom ECU and possibly larger injectors, among a few. Re-profile of the cams is easy enough and is something engine builders have done for decades. In the case of assymetrical cam timing, the cam can be cut in sections, lobe centers realigned, and then rewelded, ground, and hardened.
My 1982 CB900F had fully symmetrical cam timing and an engine counterbalancer, and it had a smooth, high revving air cooled engine producing 115 HP without the need to engineer in some "character" as the designers have done with the CB1100.
Any extensive engine mods will likely require changes to the fuel injection and ignition mapping, perhaps a custom ECU and possibly larger injectors, among a few. Re-profile of the cams is easy enough and is something engine builders have done for decades. In the case of assymetrical cam timing, the cam can be cut in sections, lobe centers realigned, and then rewelded, ground, and hardened.
My 1982 CB900F had fully symmetrical cam timing and an engine counterbalancer, and it had a smooth, high revving air cooled engine producing 115 HP without the need to engineer in some "character" as the designers have done with the CB1100.