So you find the power of your WR to be inadequate and you need more? Really? Have you changed your FI mapping at all? You can make your WR feel very much like a YZ with simple FI change, if that's what you're after. But be careful what you wish for. You're going down the same path Dirt Bike (or was it Dirt Rider?) did with their new/old WR comparo... they put Hot Cams etc in the new WR just because that *was* the hot ticket on older WRs. And then they complained that is was too moto, too much hit, bottom end was too abrupt, yadda yadda. They went out of their way to make the bike into exactly what they didn't like about it. More power isn't going to make you any faster on that bike, guaranteed. If anything, it will just slow you down. Agreed, great for desert, overpowered for the tight stuff, IMO and experience with going from a stock WR, to a YZ cam WR to a KTM 350 EXC. Gearing changes included. IMO, comparing oneself to other riders isn't the way to gauge the effectiveness of changes. You should do that based on how well you do and feel after riding in the same conditions in the same terrain. Better yet, switch bikes with someone your riding with and see how there bike rides/feels in those conditions. I just mention this as I have a "similar" but obviously not the same bike and can compare it to my new bike. There is no comparison, for me.