ok ive found brand new performance cams, carbys, and dizzy upgrades, aswell as heads, pistons, cranks etc for the f8b they are parts from a kazuma mammoth 800 utv which run a suzuki f8b engine.
http://www.mammothutv.com/kazuma-mammot ... -1137.html
http://www.kazumapower.com/kazuma-parts ... 8_188.html
these are the two main sites i found to actually work.
f8b performance cams and carby
8-10 HP from a camshaft? That's a 25% increase. Would be awesome if true.
F8B EFI turbo - Three pots and a snail.
the cams will fit the whole kazuma mammoth 800 engine is copy of the suzuki F8B all the parts will fit, when you combine the camshaft with there performance carb there will be a big difference in power. but you also have to take into account that they are an american supplier so they probably think they are gonna get thoe figures just like they think they can do a burnout.