Pointy running very hot.

[jambo]

Originally Posted by Kenzie

I think a Suzuki mech said the fan should kick in at 102c.

Sounds about right, but the temperature sensor that feeds the dash, and the fan switch are in 2 separate locations, so it's not as exact as all that

Jambo

The main thing here is that if the temperature goes up over 100 degreees in these days while moving (not standing on traffic lights) than there is another problem than "just" possible fan (or fan's sensor) failure.

[jambo]

Originally Posted by mufman

The main thing here is that if the temperature goes up over 100 degreees in these days while moving (not standing on traffic lights) than there is another problem than "just" possible fan (or fan's sensor) failure.

I agree entirely. However, this:

Originally Posted by Heefy

On the journey the temp just kept going up all,the way to 130 degrees C. I couldnt hear the fan at all, but that may be that I couldn't hear it over the other noise.

The temp did not go up and down at all. Is the thermostat knackered or air in the coolant system? There is water in the reservoir.

And this:

Originally Posted by Heefy

Today I checke the bike on the way to work, which is all A roads and motorway and it was fine. Gets up steadily to 89 degrees C, then the thermostat kicks in and it drops to 83. This is repeated for the whole journey.

Seem contradictory in terms of what the current state of affairs is, with the 2nd one seeming to vindicate the thermostat's operation.

Which is why I was concentrating on the fan initially. Clearly (as you've stated) if the coolant isn't being circulated through the radiator properly, then the fan's not going to help.

Jambo

Oh, my bad. I've overlooked the second message from Heefy. Then if it's OK while moving the fan would be the thing I would concentrate, as you guys have suggested.

I have let the bike warm up and then checked the the hose coming from the lower right handside of the rad. It was hot and the liquid was free moving.

Today I got my new fan switch, so plastics off and drained the rad and the reserve tank. Fitted the new switch. Made up a 60/40 mix of coolant and distiller water and refilled. Bled the air, quick ride and rechecked the levels. All good.

Now the bike runs as before. Up to 89 degrees C, then the thermostat opens and the temp goes down to 81. This is a continual cycle. I then left the bike running on the side stand. At 103 the fan kicked in and the temp dropped back to 91 and the fan switched off.

All seems ok now.

The switch is located on the right of the rad, directly under the hose.