In addition to the above, one of the best and cheapest improvement is a quick turn throttle tube along with new grips. Another cheap but excellent improvement is aftermarket levers. For better braking results and feel, get performance pads as well as a steel braided line for the front wheel. For a bling factor, a shift indicator light is pretty cool, in addition to being actually useful.
Personally, I think keeping the original size tires is better in terms of keeping the CBR250R's excellent handling characteristics.
As for wheels, the original cast wheels are heavy so changing them to CF or forged wheels will definitely make a big weight difference. However, If you seek performance, just get better tires. You'll be surprised how much better tires make in terms of handling. Definitely will give you more cornering confidence.
I've considered installing a power commander or the like same products but just couldn't justify the cost for the CBR. It would be pretty cool if I can install a quickshifter kit along with it, though.
Personally, I think keeping the original size tires is better in terms of keeping the CBR250R's excellent handling characteristics.
As for wheels, the original cast wheels are heavy so changing them to CF or forged wheels will definitely make a big weight difference. However, If you seek performance, just get better tires. You'll be surprised how much better tires make in terms of handling. Definitely will give you more cornering confidence.
I've considered installing a power commander or the like same products but just couldn't justify the cost for the CBR. It would be pretty cool if I can install a quickshifter kit along with it, though.