Diff. carbs, like pwk 28s

Works Triple Rate front shocks

Dyna Ignition
(check it out at http://www.mobiledyno.com/sys-tmpl/door/ )

Or an oversized Toomey Radiator.

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I'd get one of those billet water impellers, fairly cheap... compared...

 

Definately, the shocks. That is the best investment you can ever make for your quad. I learned this from a very good friend of mine and fellow racer, Scott Blanchard. Your quad will only go as fast as your suspension will let it. Then go with the other engine hop ups and you will notice a bigger difference.