The power was improved dramatically with better punch out of the corners, and Sciacqua was happy to report that it didn’t sign off on top like he suspected it might. However, our first sample of the finished project was at Piru Motocross Park, and our tester came away with a troubled look on his face. Though we consider the hillside track to be a pretty good layout for 250F machines, with few straightaways and an unforgiving hard-packed soil, the 284 just didn’t impress as much as we expected.
2010 Yamaha YZ284 Project Parts List
Cylinder Works - 3mm over-bore complete cylinder kit with Gaskets and Vertex Piston - $549.95
www.cylinder-works.com
Hot Rods Stroker Crankshaft + 3mm - $395.96
www.hotrodsproducts.com
Hot Cams
Intake Cam - $229.95
Exhaust Cam - $229.95
Valve Springs - $199.95
www.hotcamsinc.com
FMF Racing Factory 4.1 Exhaust System with Mega-bomb Header - $849.99
www.fmfracing.com
CV4 Formed Silicone Coolant Hoses - $104.95
www.cv4.net
Hinson Clutch Components
Hinson Outer Clutch Cover - $159.99
Hinson Racing Inner Clutch Hub - $309.99
Hinson Pressure Plate - $189.99
Hinson Steel Clutch Basket - $289.99
Fiber/Steel Clutch Plate Kit w/springs - $199.99
www.hinsonracing.com
R&D
Power Bowl 2 - $249.95
Flex-Jet - $32.95
www.r1dean.com
Flu Designs Custom Graphics Kit
www.fludesigns.com
Works Connection
Factory II Stand - $99.95
Elite Perch - $179.95
Front Billet Brake Cover
Rear Billet Brake Cover
Engine Plugs - $39.95
Radiator Braces - $99.95
Skid Plate - $129.95
www.worksconnection.com
Dunlop Tire
Dunlop MX51 Rear Tire - $17.99 - 60.99
Dunlop MX51 Front Tire - $24.99 - 73.99
www.dunlopmotorcycle.com
Renthal
Dual Compound Grips - $14.99
997 Twinwall Handlebar RC Bend - $119.95
Front Sprocket - $19.95
Rear Ultralight Sprocket - $64.95
R1 Works Chain, 120L - $81.95
www.renthal.com
MB1 Suspension Re-Valve
http://www.mb1suspension.com/
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