Well I have built a few race bike from stock to full race. So it all depends on what you want to spend money on. To me I like to buy quality parts for one and parts that are easily found in the paddock when something break. I learned my lesson when I bought a new type of rear set that broke at a WERA race. I couldn't race because I couldn't find parts to replace it. Second what are you going to do with the bike? race and turn it back to street after? If not sell the street stuff and that will fund your race parts. The last bike I built I was able to sell almost 3,000 dollars worth of stock parts to help fund my race equipment. Focus more on getting your bike track worthy first like braided front brake lines, damper, bodywork. Most stock suspensions today are actually not bad but would be the next focus point. Finally I would work on the motor and gearing. When I say motor I would say pipe, jet kit etc., the stock motor is actually very good. Its amazing what a few aftermarket parts can do to wake up a stock motor. So what do you want to spend???? For me the last bike I built I spent about another 4000-4500 to get it on the track the way I wanted it to be. This includes paint vinyl and everything I learned to keep the bike looking and running well. If you have any questions call me