125 4 stroke tuning software

The honda ohc 125 engine is a far better unit, and can make about 15bhp with tuning and a better cam. I know the less exhaust pipe curves the better and where it does curve try and make them long and flowing. Efi kit for 50cc to 110cc 1cylinder engine 28mm throttle body efi kit for 125cc to 200cc 1cylinder engine 28mm throttle body efi kit for 200cc to 300cc 1cylinder engine 34mm throttle body this kit does not require tuning for some popular small engines, like gy6 125cc, gy6 150cc engines or 150cc monkey bikes. All the 4 stroke dirt bikes are equipped with keihin fcr carburetors, so this post should guide you in the right direction no matter what brand you own. When this marine diagnostic tool arrives it is set up ready to go and. The most common mistake is to choose the wrong combination of engine components, making the engine run worse than stock. How to keep your fourstroke dirt bike tuned in 7 steps. We offer trackside testing for both engine tuning and efi mapping, as well as suspension. Mar 16, 2012 stroking a four stroke engine also increases the displacement making the bike illegal for ama pro racing. In a four stroke engine, there is only one working stroke against three negative strokes induction, compression, and discharge. Jan 26, 2012 scooter tuning 4 stroke 125 lovestospooge78. In a motorcycle we aim the gases out the exhaust port and into the exhaust pipe. Years ago i heard about the rc car fuel trick from a riding buddy, he would use it in races with his 125.

Processors with a lower number of cores will run the motax expansion chamber optimiser, as will the latest. Basic 2 stroke tuning changing the power band of your dirt bike engine is simple when you know the basics. In other words, the engine will, after tuning, produce more power from the same displacement. Maya programming software tool that allows full configuration of the get ecu. From a 49cc racing engine, to a gp 125 engine, or a 1500 mercurial triple engine, or a 250 kart engine, racingsm software suits all. The piston crown opens and closes the exhaust and transfer ports. The combustion is the process where the mixture of air and fuel gets burnt with the help of spark plug. Yamaha 115 hp 4 stroke 115 hp vs honda 105 hp jet drive 105 hp. Software for fine tuning and design of two stroke engine. The software in addition to defining the geometry of the insert, it also indicates the processing steps for its craft realization. There is one or more forwardlocated exhaust ports, two or more side transfer ports, and one rear intake port. Several wellplaced experts in cup told me that their teams have consumed large amounts of modeling time using very sophisticated and expensive simulation software to arrive in the ball park, and then fine tune the designs on the dyno.

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. Nov 05, 2011 a simple 3 stage two stroke exhaust calculator based on formulas of g. This book covers 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. The trend in high performance two strokes has continued towards more case volume, however each engine and application differ. Two stroke tuners handbook 2 another mistake commonly made, sometimes even by. 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. We cover that, as well as other mods on a four stroke engine. The modern race bike requires precise tuning, knowledge, and expertise to unlock all possible power, ride characteristics, and delivery of power.

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 efficient the spark produced by the spark plug the better the combustion takes place. Bigger carburetors, higher compression ratios, altered port timings and expansion. There is a wealth of knowledge contained in this manual. On four stroke racing bikes that pipe could be a long straight pipe or a short header pipe and a megaphone. We offer trackside testing for both engine tuning and efi.

You can feel the difference with an hp four stroke immediately. For example, a cc engine may produce 125 hp in stock form and 175 hp after race tuning. Simon motorsports can raise rev limiters and do custom tuning on most suzuki outboard ecus suzuki ecus. Tuning 125 4 stroke i think all of those bikes are more commuters than sporty especially the excessively heavy comet. Setup carburetor software for optimal calibration of the. So for the op, that thing looks like it needs a fairly heavily breathed on motor to work properly. The next video for racing squad channel will be about my ktm duke. The objective of tuning is to improve the volumetric efficiency of the engine. The way a two stroke motor works causes them to be f. One of the main actions of preparation and development of a 4 stroke engine consists in the modification of the camshaft.

This means that to run motax, you will need a post 2010 computer which is preferably a desktop, driven by an intel i7 4 core processor. The worlds leading 2stroke engine simulation software available readytorun on your pc, at only. Jul 18, 2012 7 steps to keeping your four stroke dirt bike welltuned posted by matt griswold on july 18, 2012 at 1. For riders who need a top level ecu with the highest technology available, the eculmb is a highly versatile and professional. I have always flown 2 strokes but have just purchased an asp 4 stroke for teh first time. Basic concept of tuning a 4 stroke petrol engine the. Two stroke motors are more efficient that four strokes for a few reasons.

They are so simple and fun that ive always enjoyed tinkering with them. In motocross its usually a compromise between best peak hp and good early off the pipe power. This coefficient kh is called the horn coefficient, with typical values between one and two. It is reflected as a positive wave which then travels back down the pipe. Most fourstroke engines, save for xr50s and ttr125s, are already at the legal. This fully revised and updated edition is one of the. The new ecu engineered by get for motorcycles model ktm rc390 and duke 125cc, 200cc, 390cc. How to increase performance of 4stroke motorcycles. We believe that using this software will help your 2 stroke development or racing results on different types of competition. Mar 12, 2008 hi, im looking at buying a nice little 4 stroke for my first bike just to act as a commuter and to get my experience up. When the intake valve opens, it creates a negative pressure wave which will travel to the end of the intake pipe.

This is aimed at people with little or no knowledge of engines or how to tune them, ive pitched it at a very basic level, its far more an intrudction than any sort of. An engine port is an open window in the cylinder wall for the intake or exhaust of fuel mixture airgas. Pilot circuit this is effective from 0 to 18th throttle positions. This fully revised and updated edition is one of the most comprehensive references available to engine tuners and race engine builders. We use computer design software to maximize power and torque at any elevation. To stroke an engine, a tuner relocates the bigend bearing further. For 4 stroke bikes with fuel injection system, which are devoid of carburetor instead of rejetting the ecu needs to be remapped. The is an introduction to tuning with a programmable electronic fuel injection ecu. Mtune pc software, pc or a windows tablet its all in the hand of the mastermind tuner. A myriad of different aftermarket accessories is available for you to custom tune your bike to better suit your needs. 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. To stroke an engine, a tuner relocates the bigend bearing further outboard on the crank. The dirt bike featured in this blog post and howto video is a 2006 yamaha yz250f. Complete assembly motorhonda cg 125 today 1999 duration.

Dec 10, 2008 lols asif, 4 bikes and no knowledge of 4 strokes aint much. Yamaha 115 hp 4 stroke 115 hp vs caterpillar 3056na 125 hp. If you want the best performance for your car and we know you do you also need a wide range of setting options. Many 125 s, like the honda cg or yamaha ybr, intended for ecconomy commuting and tuned to use as little fuel as possible and as long a service intervals as possible, only offer around.

It is written specifically for megasquirt or megasquirtii efi users who are new to tuning engine with a programmable controller, and tries to make very few assumptions about what you already know. Hp used to push the exhaust gases out of the cylinders on the engines exhaust stroke. If possible id look into the availability of a 150160cc big bore kit, as that would be a better option for more power. On the 4stroke, intake tuning is also a consideration.

Theres little point in going out to buy a 4 stroke with the intention of tuning if you got even half way to a 2 strokes power its going to be a hell of a lot less reliable. Discussion in 2 stroke started by bxl, may 30, 2010. Hp is a full on specialist in ecu tuning 2 and 4 stroke, cdi development for 2 strokes, and general mapping needs. Our goal is to achieve the biggest power gains as possible, while maintaining reliability on your 2 stroke engine. 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. Yz250, ktm 125, ktm150, ktm250, ktm300, and pwk called short body. Hi, im looking at buying a nice little 4 stroke for my first bike just to act as a commuter and to get my experience up. It is very important to understand that tuning a single item fitting bigger. Optimization of exhaustpipe tuning on a 4stroke engine. The technical and commercial success obtained in all sectors to allow us to develop continually the software in race racing.

Since less hp is used to get the exhaust out of the engine, more horsepower is available at the flywheel. 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. There is no 2stroke displacement limit for our software, for example you can have a 125, 250, 500, 700 singlecylinder and our modules will work flawlessly. You can also save and load the data by using the provided functions.

Dec 24, 2002 thought id better kick the new section off by writing an article for it myself, on the subject of 4 stroke engine tuning, no specific to minis, but all totally relevant. The old adage of stuffing cases on every project just isnt true any more. Maxxecu mtune powerful pc software for intuitive dynotuning. Ive heard the 6 cylinder 250cc 4stroke honda road racer from the 60s was a really cool sounding bike. Thought id better kick the new section off by writing an article for it myself, on the subject of 4 stroke engine tuning, no specific to minis, but all totally relevant. He managed to actually beat king kinney who was on his ow 2 stroke 500 in a heat race. Those of us who have grown up in the japanese two stroke. Every manufacturer has some form of reprogramming software that allow.

With the experience or the simulation you can determine the new timings and the new maximum lift, but what remains problematic is the determination of the lift law and of the cam profile, this to maximize the volumetric efficiency and in the meantime check out the valve. Software for fine tuning and design of four stroke engine by. There are many ways to boost the power, one of which is by installing a tuned pipe. Dellorto and mikuni, but all carburetors use the same tuning process, and all carbs can be added to the software engine tuning, or carburetor adjustment, provides more. These bikes has been known to punch out big hp with twin carbs and exhaust. Small values of kh are best suited to grand prix engines with narrow power bands, larger. A stock motor will probably never rev to the point that thatll actually work well. In a 2 stroke, we want to maximize the retention of that finite fuel charge. The exhaust pipe works because of the pressure waves generated when the exhaust valve opens. And yes, i have 3 4 strokes that are inverted in my warbirds without any problems running. Setup carburetor is sure the software more professional on the market to obtain the optimal calibration of the needle carburetor in the 2 stroke engine for every weather or track condition. The problem is that if i were to get a 125cc 4 stroke it would be barely kicking out more power than my old aprilia rs50, which was tuned to the point it did 80mph. Nmp020722 qmb 9 4 stroke chinese 50cc gy6 mrp exhaust duration. This package comes all set and is ready to work with the toughbook, software and all cables.

Discussion in general tuning started by burns, apr 10, 2008. A 2 stroke is different of course since there is only a finite amount of fresh mixture available in the crankcase to be transferred up into the cylinder. Carbhub pz20 carburetor for kazuma baja 50cc 70cc 90cc 110cc 125cc taotao 110b nst sunl chinese quad 4 stroke atv 4 wheeler go kart dirt bike honda crf50f xl75 crf80f xr50r with air fuel filter. Software for fine tuning and design of two stroke engine by. Racingsm software for 2stroke development, also for 4strokes in some modules, create 2t exhaust. Apart from pure racing machines, the bestknown fast 125 commonly found here in the uk is the two stroke aprilia rs125 discontinued in 2012, which in its derestricted form can get about 33 hp which will take it up to somewhere around 100mph, e. There is a huge interest in vintage snowmobiles and their simple two stroke power plants of yesteryear. The new programmable ecu by get for offroad fuelinjected 4stroke single cylinder batteryless engines. We cant afford to waste any of it by having it escape out the exhaust port.