Racer X Films: Garage Build 2011 Yamaha YZ250 GNCC Race Bike 

Who doesn't love the sounds and smells of two-strokes? For this build we took an older two stroke and did everything we could to make it competitive with modern race bikes.
This time we went in a different direction, gearing this bike for the off-road GNCC series instead of a closed course motocross bike. Instead of racing 30 minutes, this bike was built for technical and tight 3 hour races, which means taking a completely different approach.
Bike: 2011 Yamaha YZ250
Build: Scott Adkins / Chris Vann // prosxmxtech.com
Text: Justin Hale
Photos: Andrew Fredrickson
Video: Justin Hale / Andrew Fredrickson
We decided to spare no expense and build a bike for America’s premier off-road championship: the Grand National Cross Country Series.
Products Used:
POLISPORT
Plastic Restyling Kit
www.polisport.com
FMF
Powercore 2 Exhaust
www.fmfracing.com
MAXXIS
MXST tires (120/90-18 Rear, 90/90-21 Front)
www.maxxis.com
RENTHAL
Ultralight 50T Rear, 14T Front, Kevlar Grips, Twinwall Bars
www.renthal.com
YAMAHA GYTR
Off-Road Flywheel, Brake Line Pinch, Rear Brake Clevis, Axle Blocks, Carb Hoses, Rim Locks, Rear Brake Levers, Spokes, Radiators, Piston, Bearings, Gaskets, Louvers, Trans Cover
www.shopyamaha.com
MOOSE RACING
ProBend Hand Guards
www.mooseracing.com
TM DESIGNWORKS
Slide and Glide Kit with Rollers
www.tmdesignworks.com
FACTORY EFFEX
Graphics, Seat Cover
www.factoryeffex.com
MOTION PRO
Titan Throttle Tube - proprietary low-friction plastic composite material
www.motionpro.com
BOYESEN
Supercooler Impeller and Cover
www.boyesen.com
FACTORY CONNECTION
Suspension Revalve and Respring
www.factoryconnection.com
RK EXCEL
A60 Rims, 18” Rear, 21” Front, Chain (GB520EXW-120)
www.rkexcelamerica.com
IMS PRODUCTS
Oversided Tank, Dry Break Kit
www.imsproducts.com
ENDURO ENGINEERING
Radiator Cages, Braces
www.enduroeng.com
FASTWAY AIR
Ankle Savers, F7 Cleats
www.fastwayair.com
REKLUSE
RadiusCX Clutch
www.rekluse.com
VFORCE
VForce3 Reed Valve
www.mototassinari.com
XC GEAR
Mako 360 Bar Mounts
www.xcgear.com
BRAKING
Solid Rear Brake Rotor, Oversized Front Rotor, Pads
www.braking.com
ARC LEVERS
Levers
www.arclevers.com
XTRIG
Adjustable Triple Clamps
www.xtrig.com
WORKS CONNECTION
Billet Kit Switch, Holeshot Device
www.worksconnection.com
TWIN AIR
Air Filter, Powerflow, Filter Bolt, Radiator Sleeves
www.twinair.com
P3
Carbon Fiber Skid Plate, Disc Guard
www.p3carbon.com
ALL BALLS RACING
Steering Stem Bearings, Chain Roller, Throttle Cable
www.allballsracing.com
BOLT MOTORCYCLE HARDWARE
Two-Stroke Pro Pack Bolt Kit
www.boltmotorcyclehardware.com