my cbr is a2007 model,Australian delivered.i have read some of the replies on your site.is the 17 tooth front sproket swap a definate goer,would also like to know any other methords to gain extra hp.

Richard,Queensland Australia., August 2009

Best join the CBR 125 forum and ask them, mate...however, altering the gearing won't affect the power production at all....a smaller gearbox sprocket gives you better accelleration but lower top speed, and vice versa...however if you go up on sprocket size too far the bike won't be able to make that top speed.

John, August 2009