get some ti bolts, cut some of your tread off, change to monty tyres? cut the bashmounts off your frame. new stem bars and forks would make the most diffrence though! harry has some zoo bars he'd sell your for 10-15, buy a cheap echo stem off here, seen them go for like 15. Then buy some echo lite forks they go for 25 on here aswell. i know you dont have much money but save up and get forks first then get your bar and stem. will make alot of difference to your riding aswell, your front end will be alot lighter! on the rear end, get rid of your chain tensionors and drill some holes for some snailcams then run snail cams, seen it done before on someones onza.