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Every effort has been made to ensure the accuracy of the features and information presented in this software. However, the author accepts no responsibility, and offers no warranty whether expressed or implied, for the accuracy of this publication. The author makes no warranty of any kind in regard to the contents of this software. The author shall not be liable for errors contained in it or for incidental or consequential damages in connection with the performance or use of this software. No part of this software may be reproduced without the express written permission of the author.


Click the button below to download your copy of WinSU v2.6


ZIP format, approx. 6.4MB

Download the ZIP file to your hard disk, unzip it, and run the file "SETUP.EXE" which will install WinSU onto your computer.

Once you have installed WinSU, you will need to register and enter an activation code to fully enable all the features in your copy of the software. The table below shows which features are enabled in the free and registered software.





Technical library contains data on over 700 needles

Supports single/twin/triple/quad carbs running 0.09/0.1/0.125inch jets

Performance analysis gives power, torque, max speed, 0-60 time, etc etc

Gearbox info allows transmission loss and wheel power to be calculated

Needle dimension data can be displayed graphically or as a table

Overlay up to 8 needles profiles to compare them graphically

Suggests the best needles for your engine

Search for similar needles