ISO INTERNATIONAL STANDARD 9129 Second edition 2008-05-15 Motorcycles Measurement methods for moments of inertia Motocycles Methodes de mesure des moments d'inertie Reference number ISO 9129:2008(E) @ ISO 2008 ISO 9129:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHTPROTECTEDDOCUMENT @ISO2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, Iso's member body in the country of the requester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland ii ISO2008-All rights reserved ISO 9129:2008(E) Contents Page Foreword. iv Introduction. 1 Scope. 2 Normative references. 3 Terms and definitions. 4 Measurement conditions 2 5 Measuring instruments . 6 Measuring procedure .. 6.1 Measurement of location of centre of gravity ... 6.2 Roll moment of inertia about x-axis (physical pendulum principle) 6.3 6.4 Yaw moment of inertia about z-axis (bifilar pendulum principle)... 11 7 Test results... .16 Annex A (normative) Format for measurement results 17 @ ISO 2008-All rights reserved ii