hey everone im new to this site i have a yzf r125 as well 09 model had it since last year brand new fitted a scorpion exhaust got a sprocket machined up for me went up two teeth in the rear and plugged of the air valve box because if you have a look closer wen you take off the right hand side fairing there is a little black air valve box with rubber hoses going to the exhaust pipe its only there to put cold air into the emissions just to make it enviromentaly friendly but its taking cold air away from your engine (thats bad!!) lol!! well thats all iv dun soo far going to gwet a wild cam and start working on my engine soon cheers!!!
