Coolant burping

[Kuro]

I've burped my bikes before but with this kawi 636, seems a bit different.

I took out the rad to add a rad cage and then put it back, put back the drain screw, refitted all the hoses and filled her up with coolant.

I left off the rad filler cap and started bike, warmed her up to about 80 degrees. I saw maybe one or two bubbles during and then the coolant started flowing out over the reservoir cap opening.

I'm pretty sure theres gotta be more air in there cuz when I rode it, it seemed to get up to about 110 pretty easily at a stand still. I never noticed it that hot before. (but granted .. today was pretty hot)

I'd try the safe method of filling the overflow reservoir riding, filling, riding filling, but the overflow isn't easily accessible as its under the gas tank like the picture below.

(not my bike but just to give you an idea where the overflow reservoir is.

How do you burp your bike?

 

[Acadian1974]

I've burped my bikes before but with this kawi 636, seems a bit different.

I took out the rad to add a rad cage and then put it back, put back the drain screw, refitted all the hoses and filled her up with coolant.

I left off the rad filler cap and started bike, warmed her up to about 80 degrees. I saw maybe one or two bubbles during and then the coolant started flowing out over the reservoir cap opening.

I'm pretty sure theres gotta be more air in there cuz when I rode it, it seemed to get up to about 110 pretty easily at a stand still. I never noticed it that hot before. (but granted .. today was pretty hot)

I'd try the safe method of filling the overflow reservoir riding, filling, riding filling, but the overflow isn't easily accessible as its under the gas tank like the picture below.

(not my bike but just to give you an idea where the overflow reservoir is.

How do you burp your bike?

To help avoid air getting in there in the first place attach a long length of hose to a funnel, one reaches to the bottom of the rad. Then slowly pour the new coolant into the funnel. Once you've got the bike running, try straddling it and gently leaning it side to side, this will help work the air to the highest point of the system.

 

[frekeyguy]

tap the rad....it should get more bubbles out...

the 636 isn't any diff. than any bike...and yes they do run a bit hot

 

[Kuro]

@Acadian Its too late now, I've already added the coolant. I guess I could try leaning it.. won't get very far without spilling though.

@Frekey How hot do you get the thermostat till roughly? I can also try tapping it, though I figured the vibration of the bike would be enough to jiggle the air pockets free to the surface.

Not a fan of getting a puddle of coolant underneath the bike as a result of the liquid expanding due to heating.

 

[theraymondguy]

The thermostat has to open for the engine to really 'burp'.

Drain off some coolant if you don't want to spill any out of the rad neck.
Make sure the overflow tank is at the full mark.
Once the thermostat is open (watch heat guage, or put your hand on the upper rad hose and feel for heat), slowly top up the rad till it is nearly full and install the cap. As the engine cools the cooling system will create a vacuum and pull coolant from the overflow.
Let the bike cool, top up overflow and check rad level.

Ride.