| Part Description | Price |
| CP Pistons 13.5:1 forged piston | $229.95 |
| Hot Cams Stage 1 YZ250F exhaust cam | $189.95 |
| Hot Cams Stage 1 YZ250F intake cam | $169.95 |
| White Brothers heavy clutch springs | $24.80 |
| White Brothers WR250F carb kit | $99.95 |
| White Brothers E2 muffler/exhaust | $399.95 |
| White Brothers racing high-pressure radiator cap | $32.99 |
| Red Line motor oil (2 qt) | $21.90 |
| Renthal Twinwall bar, 997 bend | $119.95 |
| Renthal Kevlar grips | $19.95 |
| Works Connection Elite perch, blue | $179.95 |
| Works Connection engine plug kit, blue | $39.95 |
| Works Connection rear master cylinder guard | $32 |
| Works Connection rear caliper guard | $29.95 |
| Dunlop D742FA 80/100-21 front tire | $97.14 |
| Dunlop D952 110/90-18 rear tire | $88.36 |
| Baja Designs WR250F Diablo HID headlight | $395 |
| Baja Designs WR250F stator mod | $30 |
| Baja Designs rectifier/regulator | $49 |
| Baja Designs wiring harness with control switch | $39.95 |
| Cycra Composite Probend hand guards, blue, side mounts | $69.95 |
| RidePG.com shroud graphics | $79.95 |
| RidePG.com number plates | $0 |
| Pro Moto Billet sharkfin disc guard | $89.95 |
| Pro Moto Billet front brake line clamp | $27.95 |
| 2007 Yamaha WR250F | $6399 |
| Total project cost | $8957.44 |
The Winner
Stock is sweet. That's a mantra we Dirt Rider editors chant throughout our days of testing and tuning the world's most advanced off-road machinery. It's not that we don't enjoy the addition of a fair amount of anodized shiny stuff. Nor do we fear aftermarket engine mods on high-revving four-strokes or run away from custom-built suspension systems. We know they can last and are improvements over stock when done right. As we constantly push products and our own bodies in the name of testing, we find, more often than not, that the stock bikes shine just as brightly, especially when tested by a group rather than an individual. That's primarily because of the give and take inherent in modifying bikes. Modifications, by nature, are akin to individualization. And that was obvious here.The WR250F took a motor that was strong all around and built a race-bred beast of a ride. It will rip up top and is a blast to ride but suffers down low and pushes the stock suspension over the edge. The KTM already looks good and looks even better in this polished version. But we were really hoping to ride an improved 250F from the Orange crew, and we got essentially the same thing. Someone show us some more bottom and a smooth transition to the upper revs. The exception here is the Honda. Precision Concepts and its choice of aftermarket companies put together a better-than-stock bike in every sense. It handles better, it runs better, and it looks better. And it will keep working this way in our testing fleet as long as the company lets us keep it. That makes it a winner in our book.