Too true. To get any real performance improvements from your 125 will cost more than passing your test and then the performance of a 125 becomes irrelevant.
For the time being, check the brakes are not binding, check and clean the air filter, and also check and replace if appropriate the rollers and belt. Worn rollers will affect gearing, and a worn belt can limit top speed as the ratio as it runs is reduced. All of this is standard servicing.
get a big bore kit, change the jets and carb and change the belt and that should help increase the top speed but it wont be a cheap job to do what year is the typhoon and is it a 2 stroke?