31K views · 773 reactions | What does a redesigned engine with a higher compression ratio do for Husqvarna’s 450cc motocross bike? The Dirt Rider dyno tells the tale. | Dirt Rider Magazine | Facebook

Yamaha’s YZ450F doesn’t churn out the highest peak figures on the dyno but it’s an absolute monster on the track, due in part to its reverse cylinder head design. | Dirt Rider Magazine