2008 Yamaha Motorsports Apex LTX Owners Manual - Page 59

Periodic maintenance bile. Continuing to operate the engine under such conditions could cause severe engine damage. ESU12010 Cooling system The coolant level should be checked before each ride. In addition, the cooling system must be bled of air at the intervals specified in the periodic maintenance and lubrication chart. EWS00380 WARNING Do not remove the coolant reservoir cap when the engine is hot. Scalding hot fluid and steam may be blown out under pressure, which could cause serious injury. When the engine has cooled, place a thick rag or towel over the coolant reservoir cap, and slowly rotate the cap counterclockwise to the detent. This procedure allows any residual pressure to escape. When the hissing sound has stopped, press down on the cap while turning counterclockwise and remove it. To check the coolant level 1. Remove the top cover. (See page 42 for removal procedures.) 2. Check the coolant level in the coolant recovery tank when the engine is cold. If the coolant level is below the "COLD LEVEL" mark, add soft water until it reaches the "COLD LEVEL" mark. (See the following section "Replenishing the coolant" for more details.) 1. "COLD LEVEL" mark ECS00490 CAUTION: G G Hard water or salt water is harmful to the engine parts. You may use boiled or distilled water, if soft water is not available. Tap water can be used temporarily in an emergency. Bleeding the cooling system The cooling system must be bled of air if the coolant reservoir becomes empty, if air can be seen in the cooling system, or if there is a cooling system leak. Consult a Yamaha dealer. ECS00500 CAUTION: Operating the engine with an improperly bled cooling system can cause overheating and severe engine damage. 53