Best mods for 08 YZ450F??

Im a trail/track rider. I want better midrange/topend power. What are the best mods to do to these bikes apart from DRD exhaust.

Thanks

A good exhaust, jetting and gearing should get you enough. If not a high compression piston works well, I prefer a piston to cams. Some people think a H/C piston causes you to loose top end but I have not found that to be the case on the YZ-450F, the gains outway the loses in my opinion.

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