2010 Yamaha YZ284 Project Bike Photo Gallery

Quick on the track and looking very quick standing still with some slick Doug Henry inspired graphics.

We enlisted the help of Jay Clark to build a big-bore out of the new Yamaha YZ250F motocross bike. He went to work and came up with this fire-breathing monster. Read our full build-up in our 2010 Yamaha YZ284 Project Bike.

2010 Yamaha YZ284 Project Bike

If there’s one thing we notice about vet riders it’s that they love to bling things out. The YZ284F has that angle covered as well.

A Cylinder Works 3mm over-bore kit with Vertex piston joined a Hot Rods stroker crankshaft to up the displacement to 284cc. The power improvement was drastic, but so were the vibrations from the larger motor.

Once you get past the vibration through the Renthal Twinwall Handlebars (RC bend) and dual compound grips, riding the bike is a blast.

Clark also equipped the YZ-F with a FMF Factory 4.1 exhaust and Mega-bomb header.

2010 Yamaha YZ284 Project Bike

We really enjoyed the standard Yamaha YZ250F but it needed some more power. With a little strategic spending we turned it in to one of the hottest bikes at the track.

One of the things we like best about the ’10 Yamaha is that it handles so well. Amazingly quick yet unshakably stable, the chassis and suspension are easily at the top of our list. MB1 Suspension went to work on the Kayaba components with a custom re-valve.

Handling is one of the Yamaha’s best traits and our vet tester appreciated the extra bottoming resistance of the MB1-modified suspension.

Smaller, hardpack tracks like Piru don’t allow the upgraded YZ-F to really shine. We enjoyed the Yamaha much better on a faster layout, understandably.

2010 Yamaha YZ284 Project Bike