Baja Motorsports WR90 - Manual (Page 19)

vALvE INSPECTION
REFER TO MAINTENANCE SCHEDULE IN THIS OWNER’S MANUAL FOR vALvE
ADJUSTMENT INSPECTION INTERvALS.
valve clearance should be:
Intake: 0.002 inch (0.051 mm)
Exhaust: 0.003 inch (0.076 mm)
The engine will make excess noise if the gap is too large in air valve. If gap is too
small valve operation will be hindered which could result in valve malfunction and
failure. Therefore, air valve gap must be checked periodically.
If you have the proper tools and are mechanically proficient, instructions on
adjusting the valve clearance are given in the service manual. If assistance is
needed please contact Baja Inc to find your local service center.