Hello, somebody here who knows where I can buy CBR125/150 bore up kits and tuning parts? I used to order from Akunar.com but they doesn't answer on email anymore.

You probably already know this, but if your bike is a later model with fuel injection, I'd first find out if there's someone who can do a tuning download to the computer to increase fuel flow. If it's earlier you can re-jet the carb.

I'd also find out how people open up the breathing including air filter and housing to increase air flow. Of course you'll need an exhaust with more flow.

Good luck with it.