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   [Sample outputs]       [MOTA testimonials]      [MOTA V6.00 demo - Slide Show of Features!]
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The new MOTA version 6.00 for Windows®
The world's leading two-stroke engine dyno software available ready-to-run on your PC,
at only $255 ( Australian Dollars ) including GST and delivery within Australia  ....................   or only $249AUD including postage exported to most countries.

MOTA is an engine simulation program suitable for everyone from the enthusiast to the university researcher - from the beginner racer to the professional tuner. See testimonials. You can test your own engine and then re-test and compare your modifications - or build your ultimate engine right on the screen. Millions of fluid and thermo-dynamic calculations are made by MOTA representing the conditions inside your two-stroke engine throughout it's complete operating cycle.

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. Test your own theories on porting and exhaust pipe design; explore the limits of various intake methods; or just look for the highest power output from your own engine.

MOTA will accept a single-cylinder design, which will also cater for many multi's where 2, 3 or more cylinders of the same basic layout are repeated. Easy-to-operate, accurate and hours of fascinating results to enjoy! Excellent graphics you can analyse and compare. MOTA's "Two-stroke Dyno" will give you and your PC the equivalent of many experts knowledge.

MOTA and it's related set of programs have been developed to simulate the performance of high-output single cylinder two-stroke engines. It will simulate one of the cylinders of a multi-cylinder two-stroke engine provided that the cylinders are identical in layout and dimensions and each cylinder has a seperate exhaust and induction system. It allows simulation of engines with reed-valve, rotary-valve and piston port timed induction systems. Simulation of engines with either a box-silencer or an expansion chamber is also possible.

Because MOTA solves the equations describing the conservation of fluid and thermodynamic properties throughout an engine, it requires specification of the full engine geometry. This is accomplished through a menu driven environment, which prompts you for the required dimensions which are easily entered via the keyboard.

The output from MOTA is provided in two forms; a file, which summarises the engine geometry and performance, and a graphical interface which allows you to plot the various performance variables. The output file and these plots can be printed if you have a printer connected to your computer.

How MOTA works for you: An expert's view----
The strength in MOTA lies not so much in it's ability to predict accurately the performance of an engine, but in it's ability to allow evaluation of two different engine configurations. For example, if you have the MOTA produced power curve for an engine, and you want to see if modifying one of the exhaust pipe dimensions will increase or decrease power, then you can change the particular dimension and re-run the MOTA simulator. Comparison of the new power curve with the old will allow you to determine whether or not the change will be worth making.
Where is MOTA different to other computer programs and tuning manuals - and what can it do?
MOTA operates in the "real world" and it will:-
a) accept most any dimension and variations of dimensions.
b) operate on anyone's exhaust pipe theory by accepting almost all shapes.
c) operate within the limitations set under certain racing regulations.
i.e. A  KT100S  kart engine in Australia cannot be "ported" - so the ports physical dimensions cannot be modified.
MOTA will run on your own inputed physical dimensions, but allow the alteration of port timings without other physical variations.
d) accept that the data you input is from an engine that is running already, and will output it's predicted performance as a base for you to work from.
e) accept alteration to one engine dimension at a time - either real or imagined, and produce all of the new
outputs with the new dimension.
f) accept that ignition timing can be varied, and allows you to input such changes - possible or not, you can make the alteration to see what would happen.
g) does not ask complex technical questions - data inputs are easily measured and entered on the screen via the keyboard.
h) accept almost limitless variations, so you can test ideas beyond any current theories or practises.

So how does this help you?
Most everyone will have an actual engine that they wish to play with, or make perform better. MOTA can do that easily and quickly. It does not trouble you with the in-depth why's and wherefore's of two-stroke engine design theory - you are not
trying to build an engine from scratch. You can do one alteration, or many, and MOTA works with that.

Some karting race results with MOTA.
The current IWT "MR1" pipe for long circuit karting in the 100cc Non-gearbox class was designed using MOTA  --  and it won the 2001 National Superkart Championship for our own team member Michael Rogers.   It is an evolution of all of our earlier designs,  that for the past 5 years have seen multiple state championships come our way,  and at most meetings qualify at the front of the pack !!

The Mallala lap record for the 100cc Yamaha heavy class is now forever in the posession of   Ian Williams,  using this pipe as designed with the aid of MOTA.

The late model crankcase reed induction Yamaha YZ80 engine was "tuned" for Superkart racing using MOTA, to
redesign the porting and design a new reed and exhaust system -- before the first engine had even been run !!
From the first time these engines hit the track they have been winning right across Australia.

The exhaust design for this has been used to win multiple State and National Championships, as well as the reed design
now being used as "the" setup for all karts run in this class across Australia today.

System Requirements

Special features include
  1. Suitable for Kart, Motorcycle, chainsaw, personal watercraft, Model Aero and most similar engines.
  2. Accepts most expansion chamber designs.
  3. Methanol or petrol fuels accepted.
  4. Will test almost any reed valve material.
  5. Ignition timing can be varied, and 'curves' accepted.
    6. Integrated, box type or separate muffler designs accepted.
Price:   AUD $255 Australian Dollars PLUS postAGE within Australia  ... or AUD $249 exported incl post to any country.

Details for purchasing upgrades ........... The current version of MOTA is v6.00  To Order Page
The latest version can be purchased for AUD$125 Australian Dollars incl postage within Australia or exported to any country incl airmail post delivery.
Your program number must be quoted when ordering -- it is written on both your dongle and distribution disk(s). The earlier version distribution disks are not required to be returned when ordering an upgrade.


[MOTA Upgrade]  [MOTA Tech Info]    [MOTA User manual]    [MOTA User manual additions]
   [Sample outputs]       [MOTA testimonials]      [MOTA V6.00 demo - Slide Show of Features!]

To Order Page

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