Question...
 

At what tempreture does the fan kick in? i ask because ive been on some long fast rides in the last month and the bike has cut out as soon as a turn the throttle (i assume this is to do with overheating) but the fan has not once kicked in since ive had the bike.
Any ideas?

Have you checked the fuse?

The Tenere doesn't get especially hot - however, while I was in the US I found a stone had jammed the fan blades, and subsequently the fuse had blown on the odd occasion it had got hot, so the fan never cut in... I only realized once the coolant started boiling over...

If the fuse is good, then maybe you could just leave the bike running until it gets hot enough for the fan to come on? If it doesn't after about 5 minutes, then there is probably a problem with the thermostat switch or something?

Jx

Thanx ill try that, see what i find.

I've has mine Z for nearly three years and don't ever recall the fan coming on. I'm pretty sure I saw somewhere in an old post that the fan doesn't cut in till coolant gets to 105C!! I guess it then turns off again a good few degrees lower than this. If this is right(?) it suggests to me that leaving it idling till the fan comes on might mean you've got a long wait anyway, even if it is working!?

Kev would probably have the definitive on/off temperatures?

It cuts in at 105...on an R

I have the bike for almost 2 years, but it never went on.

My previous BMW was almost continuously blowing hot air on my legs

If you take it to a dealer than has the diagnostics box (or have your own one like I do x), there is a test routine to check if the fan circuit is working properly... I forget the code number off hand (I'm not that much of a nerd), but you tap it in, and the fan should go through a cycle to show its working properly - if it isn't, it flags up a fault code...

Gotta love technology!

Jx

ps. if it is a friendly 'local' dealer, they might even do it as a favor - it takes less than 2 minutes to check...

Yep.

As you are a XT Supporter, you can download the Workshop Manual. In there is a flow chart to tell you what to check, in which order and how to do it.

You need nothing more than a simple multimeter - under a �tenner from Maplin-type-shops, or �50 from Halfords! You might even have one in HG!

I would not think it would be related to over heating.

You say it cuts out, when, coming down to idle & you blip the throttle or from idle opening the throttle, or under what conditions does it cut out?

Is there air in the cooling system? I had a situation where the radiator was leaking and even though I had filled both the radiator and the reservoir, the temperature sensor didn't give any readings when it should have. Probably an air bubble where the temperature sensor is. After I got the radiator fixed, a mechanic that I know gave me a tip on bleeding the system by leaving the radiator and reservoir caps open and letting the engine idle for ten minutes. The coolant poors out a bit but so does the air. After ten minutes let the engine cool down a bit before adding coolant to adjust the level. This worked fine for me.

The service manual says that you can test the temperature sensor by measuring the resistances in three different temperatures (each temperature giving different readings): 20, 80 and 110 degrees. From this I figured that 80 degrees must be when the fan should go on and 110 degrees when the engine overheating light turns on. I'm not sure of this though.

Have you tried letting the engine run on idle for 10-15 minutes? That should turn the fan on.

Jami