This fully revised and updated edition is one of the most comprehensive references available to engine tuners and race engine builders. Bell covers all areas of engine operation, from air and fuel, through carburation, ignition, cylinders, camshafts and valves, exhaust systems and drive trains, to cooling and lubrication. Filled with new material on electronic fuel injection and computerised engine management systems. Every aspect of an engine's operation is explained and analyzed.

DIVThis thorough how-to manual helps the off-road motorcycle enthusiast get the most out of their machine. This one-stop reference covers everything from basic maintenance to performance modifications, including: • Engine rebuilding• Transmission rebuilding• Clutch repair and rebuilding• Big-bore kits• Cam kits and valve timing and tuning• Tuning stock suspension• Suspension revalving and kits• Jetting and tuning carburetors• Tuning electronic fuel injection• Wheels, tires, and brakes• Chains and sprockets• Cooling systems • Electrical systems/div

First published in 1989 as Tuning New Generation Engines, this best-selling book has been fully updated to include the latest developments in four-stroke engine technology in the era of pollution controls, unleaded and low-lead petrol, and electronic management systems. It explains in non-technical language how modern engines can be modified for road and club competition use, with the emphasis on power and economy, and how electronic management systems and emission controls work.

The process of building 4-stroke engines to a professional standard, from selecting materials and planning work, right through to methods of final assembly and testing, written for the DIY engine builder in an easy-to-understand style, and supported by approximately 200 photographs and original drawings. Containing five engine inspection and build sheets, and the contact details of approximately 45 specialist manufacturers and motorsport suppliers, the book explains build methods common to all 4-stroke engines, rather than specific makes or models. An essential purchase for all engine-building enthusiasts.

Engine-tuning expert A. Graham Bell steers you through the various modifications that can be made to coax maximum useable power output and mechanical reliability from your two-stroke. Fully revised with the latest information on all areas of engine operation, from air and fuel, through carburation, ignition, cylinders, porting, reed and rotary valves, and exhaust systems to cooling and lubrication, dyno tuning and gearing.

Tuning engines can be a mysterious art, all engines need a precise balance of fuel, air, and timing in order to reach their true performance potential. Engine Management: Advanced Tuning takes engine-tuning techniques to the next level, explaining how the EFI system determines engine operation and how the calibrator can change the controlling parameters to optimize actual engine performance. It is the most advanced book on the market, a must-have for tuners and calibrators and a valuable resource for anyone who wants to make horsepower with a fuel-injected, electronically controlled engine.

Founded on the author's many years of experience in building, tuning and modifying high-performance engines, it sets out in accessible language the principles involved in forced induction, supported by tables and numerous illustrations. From basic theory through to building a rugged engine, all the important aspects of supercharging and turbocharging are explained and analyzed.

The Honda high-performance four-stroke motorcycle is one of the most popular off-road motorcycles in the country. In this book, widely known and highly respected tuner and journalist Eric Gorr, Dirt Rider's Dr. Dirt and owner of Forward Motion, takes off-road enthusiasts through the paces of performance projects for their Honda CRFs. Whether it's a CRF450F, CRF250F, CRF450X, or CRF250X, your high-performance four-stroke Honda comes under Gorr's purview as he details the ins and outs of buying, maintaining, and upgrading the CRF-and doing the best off-road bike one better.

The suspension expert’s illustrated, comprehensive troubleshooting guide for dirt, street, and supermoto—with a solution to virtually any problem. Suspension is probably the most misunderstood aspect of motorcycle performance. This book, by America’s premier suspension specialist, makes the art and science of suspension tuning accessible to professional and backyard motorcycle mechanics alike. Based on Paul Thede’s wildly popular Race Tech Suspension Seminars, this step-by-step guide shows anyone how to make their bike, or their kid’s, handle like a pro’s. Thede gives a clear account of the three forces of suspension that you must understand to make accurate assessments of your suspension’s condition. He outlines testing procedures that will help you gauge how well you’re improving your suspension, along with your riding. And, if you’re inclined to perfect your bike’s handling, he even explains the black art of chassis geometry. Finally, step-by-step photos of suspension disassembly and assembly help you rebuild your forks and shocks for optimum performance.