Contemporary twostroke technology was introduced initially to suzuki, and later to yamaha in japan when ernst degner defected from east germany to join suzuki. First rule of 2 stroke or any tuning is to make it like it should be, i. Performance engineering 2stroke tuning we specialise in honda 2strokes, covering the cr range of motorcross bikes, the nsr250 street bikes, and hrc grand prix 125, 250, and 500s. A myriad of different aftermarket accessories is available for you to custom tune your bike to better suit your needs. All areas of engine operation are explained and analysed, from air and fuel, through carburation, ignition, cylinders, porting, reedrotary valves and exhaust systems to. Those of us who have grown up in the japanese two stroke. Two stroke carbs are usually found on leaf blowers, motorized bikes and mopeds. Geared specifically for gp and kart racers, this hardcover treasure has turned out to be a great reference source for questions on the logic and concepts that pertain to tuning a 2 stroke for maximum performance. Twostroke tuners handbook by gordon jennings pdf manual. It lets you quickly to optimize carburetion, ignition timing, spark and transmission ratio, when change, the weather conditions, the compression ratio, the height of squish, the squish band, the exhaust opening angle and the gasoline used. It is important to us that you are happy with all the work that is carried out so you come back to us and share positive feedback with others about the service you received. Full list of motorcycle service manuals for free download. Contents chapter 1 introduction 9 chapter 2 the cylinder. For sheer power for money and driveability the best setup would comprise of.
I have a 02 sensor for my mustang wideband and also have thought many times of how easy it would be to tune. The power listed on this guide is from experience not claims. Two stroke carburetors are perfect practice for novice mechanics. Port matching, porting and trenching twostroke engine cases. This section describes the basic function and the most important processes in the 2stroke cycle a tuner need to consider in general and with the bimotion tuning software in particular. Hello select your address best sellers todays deals new releases todays deals new releases. The software in addition to defining the geometry of the insert, it also indicates the processing steps for its craft realization.
Tools for calculating and converting a range of dimensions within a 2stroke engine. Setup two stroke is the universal software for optimal tuning of all 2 stroke engines. Note that the combustion products are carbon dioxide co 2 and water h 2 o, if the combustion is perfect. On a stroker things like matching the ports to the liner, crankcase to transfers etc. Software for fine tuning and design of two stroke engine by. The twostroke engine haynes owners handbook series. Outboard manuals motor repair johnson, mercury, yamaha. If you have an outboard motor and need an engine repair manual or service manual, youre in the right place carries the largest selection of tuneup and repair manuals. Twostroke performance tuning in theory and practice a. Velosolex s 3800 2stroke tuning and engine design books. Tech tune racing motorcross race winning performance 2. Basic 2 stroke tuning changing the power band of your dirt bike engine is simple when you know the basics. The piston crown opens and closes the exhaust and transfer ports. Twostroke carburetors are perfect practice for novice mechanics.
The twostroke engine is known for being temperamental, but youll learn the best ways to maintain and repair these engines and keep your machinery running at tip top performance. By combining designs which degner brought from mz with japanese technology in. Jan 14, 2012 lectron install 2 stroke tuning, adjusting metering rod, and idle duration. As necessary, technical explanations, upgrade information and any other matters of concern to mota users will be posted on this site. I usually recommend this book along with gordon jennings two stroke tuners handbook, because this book has what the first one doesnt and vice versa. Also, note that there are the same number of each kind. Petals reed valve in the 2stroke engine with reed valve admission, the identification of petals more adapted to the reed valve and to the engine is essential to maximize the performance starting from the intake phase. This is the unique supercharging effect of twostroke engines. A twostroke or twocycle engine is a type of internal combustion engine which completes a.
Graham bell takes the reader through the various modifications that can be made to a two stroke engine and its components to give maximum useable power output and mechanical reliability. Software for fine tuning and design of two stroke engine. Geared specifically for gp and kart racers, this hardcover treasure has turned out to be a great reference source for questions on the logic and concepts that pertain to tuning a 2stroke for maximum performance. The software in question the inexpensive stuff is great for someone who just does not have the math skills to wade through what seem to be a text book of complex formulas. Two stroke performance tuning a disc partially cut away and attached to the end of the crankshaft opens and closes an inlet port in the side of the crankcase. Seloc suzuki outboards 19962007, all 2300 hp, 14cyl. Racingsm software has features for many different areas 2 stroke exhausts development, drag racing features, simulators, carburetor tuning, connectingrod analysis etc with all this knowhow along with lufo racing heritage, we believe this is a very fair price. The businesses and individuals that purchased the original dynomation 2 stroke program were pleased with the capability and accuracy of the software. Buy haynes two stroke performance tuning 2nd edition.
Racingsm software has features for many different areas 2stroke exhausts development, drag racing features, simulators, carburetor tuning, connectingrod analysis etc with all this knowhow along with lufo racing heritage, we believe this is a very fair price. They are easy to work with and do not require excessive motor knowledge to achieve desired engine performance. Two stroke performance tuning volume of the cylinder with the piston at tdc figure 2. It features drawings, photographs and schematics to guide you along the repairs. Balancing the crank dynamically, getting correct piston to bore clearance, using good rings with correct end gap, matching piston weights. The twostroke engine has been developed to a degree that was not thought possible a few years ago. For those looking for a copy, found the complete nonscanned printers format manual online.
The website does not intend to compeed with any other website dealing with 2stroke tuning, and the information shared is not at all as thorough as what you can get from reading the books. Support for windows not only makes the program easier to use, but it also allows the growing number of two stroke enthusiasts to use this powerful simulation on windows. I regard this book to be one of a pair of nonacademic tuning books to own. An excellent academic book on the theory behind performance tuning for 2stroke motorcycles. But because of the limited worldwide activity in twostroke engine development, program sales were limited and further development was curtailed. Other books to his credit are modern engine tuning, twostroke performance tuning and. Bigger carburetors, higher compression ratios, altered port timings and expansion.
Processors with a lower number of cores will run the motax expansion chamber optimiser, as will the latest. Lots of people charge for motorcycle service and workshop manuals online which is a bit cheeky i reckon as they are freely available all over the internet. Although there is really no shortage of books on the subject of 2stroke tuning and preparation, i knew that an active software programme would be able to offer so much more. Nitrogen n 2 is also present in the atmospheric air, but ideally does not participate in any reactions it is quite inert at low temperatures. Two stroke tuners handbook 2 another mistake commonly made, sometimes even by those who have enjoyed some success in modifying twostroke engines, is to believe in a kind of mechanistic magic. Setup two stroke is the universal software for optimal tuning of all 2stroke engines. Twostroke engine repair and maintenance paul dempsey. Petals reed valve in the 2 stroke engine with reed valve admission, the identification of petals more adapted to the reed valve and to the engine is essential to maximize the performance starting from the intake phase.
The morbidelli 125 twin road racer is a rotary valve engine. The other is jennings and the academic books are blair and heywood. Legend boucles bastogne 2020 historic oldtimer rallye best scenes of epic race cars duration. Twostroke performance tuning in theory and practice.
Graham bell explains and analyses every aspect of an engines operation in this illustrated book. Most car engines are four stroke, which means that each piston moves up and down twice two upstrokes, and two downstrokes, making four strokes, to produce one pulse of power. An excellent academic book on the theory behind performance tuning for 2 stroke motorcycles. The main advantage of twostroke engines is that they can combust more volume of fuelair mixture than the swept volume of the engine.
The worlds leading 2stroke engine simulation software for 3. The calibration software allows you to tune in a 2 stroke parameters for the rpm trigger guess its just a tease. A 125cc fourstroke engine combusts about 110cc of fa gasses but a 125cc twostroke engine combusts about 180cc of fa gasses. Turbo and even supercharger setups of various configurations can be very useful, however, they are often more complicated with 2 stroke tuning than with 4 stroke applications on a tangent, i did witness a 50cc turbo 2 stroke bike that would do over 150mph, but i digress. Setup two stroke software to optimize carburetion, ignition. Jul 18, 2012 legend boucles bastogne 2020 historic oldtimer rallye best scenes of epic race cars duration. Lectron install 2 stroke tuning, adjusting metering rod, and idle duration. Haynes publishing is the home of car, motorcycle, scooter and atv manuals, as well as a range of other specialist topics in print and digital formats. This engine modelling software allows for the complete prediction of engine performance from torque to fuel consumption to exhaust emissions. The website provides details of ian williams tuning which has played a major role in the development of the mota software.
Drawing on his practical experience in tuning and modifying highperformance road, rally and race units, it sets out in detail the many prionciples involved in tuning four stroke engines. Twostroke performance tuning 2nd edition haynes publishing. As said though the 4stroke engine tuning book is really good, dispels the myths that you can blindly buy all these stupid bits like skunk2 tbs and wack them on the car to get massive gains. This section describes the basic function and the most important processes in the 2 stroke cycle a tuner need to consider in general and with the bimotion tuning software in particular. The website does not intend to compeed with any other website dealing with 2 stroke tuning, and the information shared is not at all as thorough as what you can get from reading the books. Performance engineering 2 stroke tuning we specialise in honda 2 strokes, covering the cr range of motorcross bikes, the nsr250 street bikes, and hrc grand prix 125, 250, and 500s. This means that to run motax, you will need a post 2010 computer which is preferably a desktop, driven by an intel i7 4core processor. Two stroke performance tuning chapter 3 porting and cylinder scavenging today, when we take a look down the cylinder of a two stroke engine, we find its walls literally filled with ports to handle the induction, transfer and exhaust phases of gas flow through the engine. Most of my friends and i rode 2 stroke street bikes and welcomed the. Mota for windows slide show of features millions of tuning variations possible.
Gotta to say i had a bit of a chuckle when i opened the package only to be faced with a haynes manual about twostroke performance tuning. The most common mistake is to choose the wrong combination of engine components, making the engine run worse than stock. Twostroke carbs are usually found on leaf blowers, motorized bikes and mopeds. Drawing on his practical experience in tuning and modifying highperformance road, rally and race units, it sets out in detail the many prionciples involved in tuning fourstroke engines. Most car engines are fourstroke, which means that each piston moves up and down twice two upstrokes, and two downstrokes, making four strokes, to produce one pulse of power. The inlet port opens 30 after bdc and closes 79 after tdc. Ordered a haynes manual for the 9t and a nice package dropped through my letterbox at the weekend. The idea is to get an education in cause and effect. Buy haynes two stroke performance tuning 2nd edition h619. Most of my friends and i rode 2 stroke street bikes and welcomed the knowledge that. Bells fourstroke performance tuning book, this book goes into extreme detail regarding performance tuning a twostroke engine.
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