Yamaha 2004 YXR660 Service Manual page 439

CLEANING THE AIR FILTER ELEMENTS
1. Remove:
• driver seat
• passenger seat
• console
Refer to "SEATS, ENCLOSURE, HOOD
AND CARGO BED".
2. Remove:
• air filter case cover 1
3. Remove:
• air filter element assembly 1
• air filter element cap 2
• air filter element 3
CAUTION:
Never operate the engine with the air filter
element removed. This will allow unfiltered
air to enter, causing rapid wear and possi-
ble engine damage. Additionally, operation
without the filter element will affect carbu-
retor tuning with subsequent poor perfor-
mance and possible engine overheating.
4. Check:
• air filter element
Damaged → Replace.
– 23 –
CHK
ADJ