09 450rs

[NWrider]

I changed my radiator fluid but some1 told be there is a bleeder valve neer sparkplug hole on rfs engines not sure which one it is or if its true any info appreciated thanks

[RRyder]

The only "bleeder" I know of for the cooling system is the 8mm (90% sure 8mm) bolt underneath the coolant hose at the front of the engine.

There is a PDF you can download of the parts diagrams and shop manual online:
http://www.americanbeta.com/node/708

[Haychip]

Typically, you should not have to worry about bleeding, the system seems to "self bleed". just run with cap off until thermostat opens then keep adding, and if you have good flow in left radiator you should be good to go.

[NWrider]

Thanks guys

[terboed]

Anytime I have the coolant completely drained out of the cylinder I will crack the coolant bleed bolt.



Ive been told if you don't do this the air bubble that forms here will cause a hot spot in the cylinder head.

Loosen it, you will see air bubbling out. Let it bubble until coolant comes out.

I have done this on a buddies bike that had no clue this bleed screw existed. He had taken the bike on a trail ride since he did the flush. The air bubble was still there.

[terboed]

Also there is another bleed screw at the top of the right radiator. I crack this screw as well when flushing the coolant.

[NWrider]

Thats awesome thanks 4 the info