In motocross its usually a compromise between best peak hp and good early off the pipe power. Tsr s programs will get a tuner 90% to the engines potential. Look very good and i understand this program gave excellent performing pipes to others. Looking for tsr software if this is your first visit, be sure to check out the faq by clicking the link above. Kenny roberts, gary scott and others raced these as they progressed up the ranks to finally compete for the grand national championship which combined dirt tracking with road racing for gnc points. Two stroke top end rebuilding tsm tech topend rebuilding is the most frequent and costly service routine on twostroke dirt bikes. Theres so many different kinds of oils on the market today, so how do you pick one. Basic two stroke tuning by eric gorr changing the power band of your dirt bike engine is simple when you know the basics. Moreover you can have advices for the development of the engine thanks to the help of tested formulas for intake, exhaust. Every year, dirt bike riders waste loads of money on topend parts that didnt need to be replaced, or make costly mistakes while performing repairs. We have been advancing our 2 stroke engines for over 37 years and we are now offering the software we designed to set many of our world records.
Two stroke dirt bikes have recently been manufactured with an electric start by companies like ktm. To get the most out of your bike, learn the basics of jetting see dr. Tom turner, master two stroke tuner, pipe builder, and the man that developed tsr two stroke racing software designed and built his 424cc yamaha rd400 dragbike to develop and prove his racing design software and prove it, it did. I have heard trs software is similar, but gp blairs is cheaper plus it comes with a book explaining all of the engineering behind it. Developed by pedro, with more than 20 000 lines of code, all the knowhow applied to software comes from us and also a lot from the legendary portuguese 2stroke tuner lufo racing, this software is directed for all 2stroke. Problem is, i have no idea what is out there thats good even through searching. 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. If youre in the market for a twosmoker for the outback, this list of ten best twostroke dirt bikes for offroad riding is a good place to start shopping. Tools of the trade there are two main types of tools used in porting, measuring and grinding. Head calculations using tsr software pilot odyssey.
The bike has never had the engine messed with or taken apart. Software for fine tuning and design of two stroke engine by. Give me the missing numbers and i can run it throught the tsr software and give you some solid info before you creat a detonating time bomb. Decades have passed since i hung around with john and jim. Jan 19, 2008 he will do one of two things,hang up, or if he is a good one,start explaining the complex nature of fluid dynamics, sonic wave pressures and the effects temperature on the speed and timing it takes to hit an open exhaust port at 6500 rpmsthis being said.
We have one off twostroke dirt bikes that will empty your bank account to dirt bikes that are affordable to the average joe. It is true that 2strokes require whats called premix which is a mixture of gasoline and oil. All engine development is done exclusively with tsr two stroke racing engine design software and. From an engineering standpoint the tsr software is pretty lowend, but if you dont have any experience with any cad or cfd software, it is probably your best bet. However, you shouldnt just pick any business that you can find anywhere. Mar 26, 2019 the modern 2 stroke dirt bike engine is a work of art. Tony thanks you for your support in all of his racing endeavors.
A myriad of different aftermarket accessories is available for you to custom tune your bike to better suit your needs. Tsr copy changed files free software for logging changed and modified files. Basic 2 stroke tuning by eric gorr changing the power band of your dirt bike engine is simple when you know the basics. Hoping someone here has a good bead on a site with a lot of. Thanks to the software two stroke design instead you can enter the data of your cylinder with extreme facility and precision, and then analyze the port areas and the timing area in the engine cycle timing for each phase. Tsr software creating simple solutions to complex problems. Head calculations using tsr software by sainty ok here goes with the new specs after redoing both the stroke length and the exhaust opening the very first thing to be done is to calculate the compression ratios both corrected and uncorrected. Millions of fluid and thermodynamic calculations are made by mota representing the conditions inside your two stroke engine throughout its complete operating cycle. May 27, 2007 back in the day two stroke twin flat trackers were raced in the ama novice class. Unlike 4 strokes, the 2 stroke engine does not have valves. Tsr lan messenger encrypted interoffice communications with no outside interference. There is a wealth of knowledge contained in this manual. Ive got alot of added parts on the bike which ill list below.
If your bike accelerates poorly, smokes, fouls plugs, or has a deep. While i am sure the mods would not mind talking 2 stroke stuff here, i thought maybe i should keep this forum more 4stroke and go find me a 2 stroke sight. Motocross action brings you all the twostroke action that you can handle. Ten best twostroke dirt bikes for offroad riding page. Measuring the basic measuring tools include a dial caliper, an inside divider, and an assortment of angle gauges. The two stroke dirt bike engine building handbook is the most comprehensive guide for dirt bike engine building available, whether you are working at home or as a professional in a shop. Tools of the trade, by eric gorr the dirt bike, mx. Web site community for 2 stroke riders atv, dirt bikes, snowmobiles, quads and more. Contents1 riding a 2 stroke vs 4 stroke dirt bike1.
You should only rely on the experience of the very best. No previous knowledge of the two stroke cycle engine is required just input the required data and then run mota to set in motion this powerful process. Its a great addition to twostroke engine dirt bikes. The common comparison between 2 stroke and 4 stroke bikes are as follows. Mixing 2 stroke fuel ratios for dirt bikes premix can be a royal pain in the jaxi, and more annoying than having to listen to britney spears on the office radio. The old adage of stuffing cases on every project just isnt true any more.
If you are aiming for these qualities, modifying your 2stroke engine is a great strategy. From smart customization of the predeveloped platforms to fullcycle custom software development along the clients vision, tsr software solutions is an experienced development partner to deliver costeffective and reliable custom software solutions that match your unique requirements. But because of the limited worldwide activity in two stroke engine development, program sales were limited and further development was curtailed. Our online superstore has the best selection, prices, and service in karting. Our goal is to achieve the biggest power gains as possible, while maintaining reliability on your 2stroke engine. The power center has only three primary moving parts the piston, connecting rod, and crankshaft. The tsr software does take a bit more knowledge of engine theory and operation than the race logic templates do of course.
Basically a tuner types in engine spec dimensions like the bore and stroke plus all the individual port measurements. Software for fine tuning and design of two stroke engine. Husqvarna has an additional fuelinjected twostroke and two new fourstroke offroad models in its lineup of enduro and dual. My name is ed erlenbach, im a private tuner specializing in yamaha rd and tz performance in southern california. The trend in high performance two strokes has continued towards more case volume, however each engine and application differ. Speed and reliability are two important factors which determine the advantage of an engine. We are a two stroke shop that loves the two stroke lifestyle, but we do not exclude 4 stroke riders. North american two strokes general two stroke discussion two stroke engine and exhaust design software this is the place to talk about anything related to two stroke road race bikes. The company the group formed is called the two stroke shop, and besides many other parts for the 2 stroke fanatic, they offer not only complete rs 500 motorcycles but also the engines alone or kits to adapt your own rs250 to accept their engine. In clubs and paddocks across the world, proponents from both camps argue their corners passionately. The process of building twostrokes to race engine quality is explained indepth in this thoroughly illustrated handbook.
New 2 stroke dirt bike 17 matching articles cycle world. Lets journey back to 1973 and read the book that was the two stroke bible of that era. No other bike on the market offers the performance, value and features of the tse. Aug 01, 2019 put enough hours on an engine and something will let go. With our tsr mobile tracking status and reporting asbuilt software, you can download hdd bore information directly to your mobile phone, tablet or computer. Ive been using cheap 2 stroke oil all my life and finally decided to buy some expensive stuff. Basic twostroke tuning by eric gorr changing the power band of your dirt bike engine is simple when you know the basics.
West coast porting offers two stroke porting from recreation to full race porting, atv, watercraft, dirt bike porting for all 2 stroke engines. Tom turner, master two stroke tuner, pipe builder, and the man that developed. With its simple and effective oil injection system the tse250r takes the guess work out of owning a two stroke. Nov 17, 2004 tsr two stroke racing engine design software. Now, if the bike were to stall in some ugly place or if you were to fall from a hillside, you will be extremely happy to be able to. Motocross 2 stroke dirt bikes for sale in australia. By replacing the manual bore log, tsr mobile speeds production and reduces logging errors. I think i saw that as of several years ago the tsr is no longer being supported.
Ok, so it didnt exactly work out that way but if you ride a 2stroke dirt bike or atv, or operate 2stroke machines around the house like a chain saw or lawnmower than you know a little something about the unique needs of a 2stroke engine. Two stroke vs four stroke the truth ride expeditions. Jeff sounds impressed with the engmod2t, but says that you need to collect a lot of. The modern 2 stroke dirt bike engine is a work of art. Power or capacity the 4 stroke bikes are very good in motocross rather than 2 stroke bikes because they are twice the size of 2 stroke dirt bikes. Enthusiasts, tuners, mechanics, gp, drag racing, mx, enduro. Okay, so its been over twenty years since doug henry catapulted the yamaha yzm400 four stroke dirt bike onto the forefront of the motocross scene, and yet the two stroke vs. Tsr two stroke racing software designed and built his 424cc yamaha rd400.
Dirt bike magazine teamed up with test rider robbie wageman fasthouse, throttle syndicate, gasper racing and the crew at yamaha to build a yz125 2stroke for the 2019 red bull straight rhythm. Tsr twostroke racing engine design software at bikelinks. The future of two strokes and your dirt bike dirt bike. Developed by pedro, with more than 20 000 lines of code, all the knowhow applied to software comes from us and also a lot from the legendary portuguese 2 stroke tuner lufo racing, this software is directed for all 2 stroke. There is a huge interest in vintage snowmobiles and their simple two stroke power plants of yesteryear. The pros of a 2 stroke vs a 4 stroke, according to some riders, include. However, its essential for two bangers and its something you need to do correctly or youll damage or even destroy the engine. Bigger carburetors, higher compression ratios, altered port timings and expansion. With 4 stroke engines, porting, when performed correctly and with the right tools, will result in positive horsepower gains, along with increased fuel efficiency and a smoother running engine. But if we compare the firing strokes than 2 stroke bikes are better than 4 stroke bikes. For this yz250 two stroke motor it was the crank after 250 hard hours.
It made dreaded noises and came to skidding stop in the middle of. 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. Honda made the 2 stroke bikes until 2008 which makes the 2005 model fairly new. Whether one sticks such an engine in a dirt bike, a street bike, a lawnmower, or whatever, is an issue somewhat outside the realm that i will address. With 2 stroke engine modification, porting and polishing is the ultimate choice. Choosing 2 stroke vs 4 stroke dirt bikes comes down to a personal preference. What i want to get across to people now, which is about all there is to talk about, is the potential what twostroke engines can be the future of two strokes. Dragbike to develop and prove his racing design software and prove it, it did. Tsr continuously backup easy to use protection of files, never miss a file. The 2 stroke dirt bike engine and how it works dirt bike. The program runs mathematical calculations in order to provide a simulation of how the porting changes will affect the engines powerband. I am selling my cr125r 2005 model 2 stroke dirt bike. Motology films brings you episode 2 of the dirt kitchen, as riemann and grabbo try to smash the lap record with the old cr250 farm bike, then go lap for lap in a twostroke fourstroke battle.
The truth its the question that goes round and round in circles. This bike features engine mods and suspension load more posts. Tsr twostroke racing engine design software and vannik developments two stroke engine simulation software. Two stroke engine and exhaust design software north. Thank you for visiting tony stewarts official online retail store. Cc specialty tools porting and polishing for 2 stroke engines. Brad, my friend jeff has both the tsr and engmod2t packages. The most common mistake is to choose the wrong combination of. What 2stroke premix to use in your dirt bike or atv. We had chance to test ride this 700cc 2 stroke dirt bike. We use computer design software to maximize power and torque at any elevation.
We had a lot of good info because we are building our own 700cc dirt bike in some point. Apr 03, 2017 while i am sure the mods would not mind talking 2 stroke stuff here, i thought maybe i should keep this forum more 4 stroke and go find me a 2 stroke sight. You can estimate the octane requirements and the cranking psi of the engine. Basic 2stroke engine tuning information joe hunt rc. Top 5 overlooked dirt bike maintenance jobs duration. Twostroke waveaction engine simulation motion software. You cant get a 450 2 stroke but you can get a 500cc 2 stroke. In hammond, indiana, service honda takes the old and blends it with the new, creating unique two stroke dirt bikes.
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