I've been waiting for somebody to do this. I had it done on my Repsol but have been very hesitant to attempt it on my S1000RR...


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Although a venerable mod I don't think it's necessary as the fan kicks on when it needs to. I did this mod years ago on an R1 and I never really used it much.

 

It is not only unnecessary, it's quite stupid to be honest.

If you're XXXXXXXX enough to think this is a good idea still, keep in mind there's no need for an additional fuse, the OEM fan circuit is of course fused and adding a fuse adds one more failure point.

I'm not sure when, or why, the public got to believing engines should run cold. They shouldn't. You oil is designed to run at 240-280 degrees, and your coolant is designed to run 200-220. This is important, and it is supposed to be that way. When your bike hits 216 at a red light, and the fan kicks on, this is OK, normal, and not in any way bad! Hell the newer BMW cars run their coolant up to 250 degrees at times, on purpose by design.

Your bike will not overheat. Period. Quite frankly, there isn't a situation you could put your bike in that it will overheat. It'll get 'hot,' maybe even hitting 230, but it won't overheat and won't do any damage. You could sit at idle in death valley on the hottest day on history and it won't overheat.

Unless you have a component failure, it is impossible to overheat your bike in any foreseeable operating conditions. This includes death valley. Not only will the bike simply not get that hot, but even if it managed to overheat, let's say you had a radiator airflow blockage, the ECU will do whatever is needed to prevent damage. It'll pull ridiculous amounts of timing, run crazy rich, limit throttle, and even shut down completely prior to damage.

Leave your cooling system alone. Want to do good for your engine? Install a block heater and use it.

 

LMFAO!!

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A more elegant way would be to program the ECU to kick in at an earlier temperature.

I did that with my previous 2014 R1, using the Ecunleashed programmer. That bike used to run like a wood burner between my legs, with the exhaust pipe under the seat; an excruciating experience in summer traffic!

Programming the ECU actually helped a lot, however, I really don't know how to program the ECU on a BMW.

To reduce the wood burner effect on my BMW, I just replaced the Cat with a Y-pipe. End of the problem. ?