Motocross Off Road Performance Handbook

Motocross Off Road Performance Handbook

This third edition of Motocross Off Road Performance Handbook is the complete guide to turning your motocross or off road motorcycle into a wicked racing weapon. From suspension tuning to building a high revving outdoor racer, tunerjournalist Eric Gorr gives you the inside line on tricking out your off road machine. Whether you want a broader, more usable powerband for enduro competition, explosive low end power for supercross, or more top end boost for motocross racing, Motocross Off Road Performance Handbook takes a hands on approach to getting the most from your engine. This new edition covers all current models of two and four stroke engines, including the latest high performance four strokes from Yamaha, Honda, Suzuki, Kawasaki, and KTM. The book includes Rebuilding four stroke top ends Jetting and exhaust tuning Porting and reed valve modifications Suspension setup, tuning, and revalving Used bike evaluation Dual sport conversions of off road bikes Supermoto setups Tuning tips for late model bikes Recommended tools and shop setup Race day preparations With this new edition of Motocross Off Road Performance Handbook, you'll have an arsenal of information to give your bike the competitive edge needed to capture the checkered flag. Table of Contents ACKNOWLEDGEMENTS INTRODUCTION. CHAPTER ONE GETTING STARTED Types of dirt biking Evaluating dirt bikes Tips on test riding Where to spend your money Shopping for rebuilding and tuning services Buying a used dirt bike Selecting the right tools Outfitting your workshop Environmentally concious methods for cleaning parts. CHAPTER TWO BASIC MAINTENANCE Dirt bike cleaning techniques Fuels, lubricants, and fluids Air intake system Spark plug basics Types of spark plugs The throttle Runaway throttle Chain and sprocket basics Tips for changing the sprockets Cooling system Clutch repair Electrical and ignition systems Fitting aluminum handlebars Fitting radiator guard and tank stickers Fitting seat covers and foam Race day preparations. CHAPTER THREE TRANSFORMING YOUR MX BIKE Converting your MX bike or dual sport bike for off road riding Converting your MX bike for DTX or supermoto racing. CHAPTER FOUR SUSPENSION and CHASSIS Baseline settings Cartridge fork service and tuning Rear shock servicing Video suspension tuning Frame care Linkage service Suspension terminology. CHAPTER FIVE CARBURETOR TUNING The difference between two stroke and four stroke carburetors Carburetor ID guide Carburetor parts and function Basic carburetor service Mechanical problems Jetting shouldn't be scary! Fuel and oil mixture ratios Tuning gauges. CHAPTER SIX TWO STROKE TOP END REBUIDING Before you start Maintenance and inspection The piston Cylinder and exhaust valve cleaning tips Big bore kits Troubleshooting piston failures Two stroke exhaust valves Exhaust valve tips and tuning. CHAPTER SEVEN TWO STROKE LOWER END REBUILDING The right tools Electrical system disassembly and inspection Clutch disassembly and inspection Shifter, kick starter, and primary gear disassembly and inspection Splitting the crankcases Transmission disassembly and inspection Bearing removal and installation Crankshaft installation Assembling the crankcases Breaking in a new bottom end Crankshaft repair. CHAPTER EIGHT TWO STROKE ENGINES Two stroke principles How to choose a powerband Tuning guide to performance modifications Engine management systems Performance mchining tools and techniques. CHAPTER NINE FOUR STROKE ENGINES Leak down testing Common problems Four stroke top end rebuilding. CHAPTER TEN WHEELS, TIRES, and BRAKES How to fix wheels Wheel bearing repair Tires Brake systems. CHAPTER ELEVEN TUNING TIPS FOR HONDA DIRT BIKES 1990 2004 Honda CR8085 2000 2003 Honda CR125 1998 1999 Honda CR125 1990 1997 Honda CR125 1985 1989 Honda CR125 2002 2004 Honda CR250 1997 2001 Honda CR250 1992 1996 Honda CR250 1990 1991 CR250 2002 2004 Honda CRF450 1990 2001 Honda CR500 1985 1989 Honda CR250 and CR500 Honda XR tuning. CHAPTER TWELVE TUNING TIPS FOR KAWASAKI DIRT BIKES 2000 2004 Kawasaki KX65 1990 2000 Kawasaki KX60 1998 2004 Kawasaki KX100 1994 1997 Kawasaki KX100 1998 2004 Kawasaki KX8085 1990 1997 Kawasaki KX80 1985 1990 Kawasaki KX80 and KX100 2001 2004 Kawasaki KX125 1998 2000 Kawasaki KX125 1997 Kawasaki KX125 1993 1996 Kawasaki KX125 1992 Kawasaki KX125 1990 1991 Kawasaki KX125 1985 1989 Kawasaki KX125 1988 1989 Kawasaki KX125 2004 Kawasaki KXF250 2001 2004 Kawasaki KX250 1997 2000 Kawasaki KX250 1993 1996 Kawasaki KX250 1991 1992 Kawasaki KX250 1990 Kawasaki KX250 1985 1989 Kawasaki KX250 and KX500 1990 2004 Kawasaki KX500 1983 1995 Kawasaki KDX200. CHAPTER THIRTEEN TUNING TIPS FOR SUZUKI DIRT BIKES 2002 2004 Suzuki RM85 1990 2001 Suzuki RM80 1997 2004 Suzuki RM125 1990 1996 Suzuki RM125 1985 1989 Suzuki RM125 2001 2004 Suzuki RM250 1996 2000 Suzuki RM250 1993 1995 Suzuki RM250 1990 1992 Suzuki RM250 1985 1989 Suzuki RM250 1989 1999 Suzuki RMX250. CHAPTER FOURTEEN TUNING TIPS FOR YAMAHA DIRT BIKES 2002 2004 Yamaha YZ85 1993 2004 Yamaha YZ100 Conversion 1993 2001 Yamaha YZ80 1997 2004 Yamaha YZ125 1994 1996 Yamaha YZ125 1992 1993 Yamaha YZ125 1990 1991 Yamaha YZ125 1985 1989 Yamaha YZ125 2001 2004 Yamaha YZF250 1999 2004 Yamaha YZ250 1997 1998 Yamaha YZ250 1994 Yamaha YZ250 cylinder and long rod kit 1992 1996 Yamaha YZ250 1991 1992 Yamaha YZ250 1985 1990 Yamaha YZ250 2003 2004 Yamaha YZF450 2000 2002 Yamaha YZF426 1998 1999 Yamaha YZF400. TECHNOGEEK'S LIBRARY

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