Suzuki GZ250 Mods! Some Ideas Please!

Hey all, I am about to purchase a 2005 Suzuki GZ250. It is my first bike and I wanted something affordable and not too strong. Sadly the 250 is only capable of MAYBE 80mph...my question to you all is...are there any inexpensive mods to put on the bike to give it the ability to get maybe 10-15mphs more that wont damage the bike? It is going to be used as a daily driver and needs to last at least a year to a year and a half. Please let me know of any ideas. Thanks.

Cheapest mod EVER: "derestrict" the airbox (holes can be made VERY cheaply ;) Ya know what I'm sayin?)

do you mean speed holes?

i remember seeing Homer do that once. use a pick axe to put holes in your bonnet for extra speed. hmmmm donuts


another one is change the rear sprocket at the first service. it can either make the bike accelerate quickly but lose top speed or reverse and gain top speed but lose acceleration. roughly 3 teeth equals 6-8%

costs about 20 bucks