proper coolant flush procedure for 08

What kind of riding were you doing to get it so hot, and what was the temperature that day? If it was cold outside and/or you didn't really work the bike that hard, maybe your bike is running on the lean side. That would make it run hot..


As far as flushing the system, unless you were running tap water, flushing isn't necessary IMO. I've heard of vinegar flushing to remove mineral or calcium deposits but idk anything about that method, nor can I recommend it.

If you really want to flush it..

I would just refill with straight distilled water and run it till hot. Dump that out and refill with 30-40% coolant and 70 or 60% distilled water. The manual says 40/60 I believe. If you live in a warmer climate, 30/70 will be fine and will be freeze safe to 10°F (i think)

I have been using Pentafrost SF coolant, The SF is silicate free as well as phosphate free. It's pink in color.

It's not too expensive, about $17 iirc, for 1.5 liters.

The bleeder screw needs to be cracked open when running and at operating temp. You will see air escaping when it's cracked open. Once it comes out just coolant and no air bubbles it's "burped" and there is no air in the engine.

** I have found that even when not running, and cold that opening the bleeder will allow air to escape, so you CAN bleed some of the air out before even starting it.

** Bleeder screw is on the head behind the spark plug.

I forgot to say after bleeding it, fill just 10mm above the fins when the bike is level.

When its on the side stand, you will see the top of the fins exposed if filled as above.