When the engine is running, the air intake valve is lifting up.
If the valve does not operate properly, check the air intake solenoid valve hoses for leak.
If there are no leaks, check the air intake solenoid valve.

Air Intake Solenoid Valve Unit TestGeneral Information
All rights reserved. No parts of this publication may be reproduced, stored
in a retrieval system, or
transmitted in any form or by any means, electronic mechanical photocopying,
recording or otherwise,
without the prior written permission of Quality Assurance Division/Motorcycle &
Engin ...
Master Cylinder Inspection (Visual Inspection)
Remove the master cylinders (see Front/Rear Master
Cylinder Removal).
Disassemble the front and rear master cylinders (see
Master Cylinder Rubber Parts Replacement in the Periodic
Maintenance chapter).
Check that there are no scratches, rust or pitting on the
inner wall [A] of each ma ...
Front Fork Assembly
Replace the following parts with new ones.
Slide Bushing
Guide Bushing
Oil Seal
Install the following parts to the inner tube [A].
Dust Seal [B]
Retaining Ring [C]
Apply grease to the oil seal lips.
Install the oil seal [A] so that the stamp side faces lower
side.
Insta ...