I am having a bit of bother with the radiator fan not coming on, on my 2004 sherco 290.
I replaced the otter switch and still no joy, then removed the connectors from the switch and joined the two together, the fan then came on so this confirmed that the fan will actually work and that there is power coming from the flywheel
The bike has been taken out on long runs, 2+ hours and it still hasnt come on. The bike has plenty of power throughout the run but I did notice when climbing long steep hills that ther was some water coming out of the radiator overflow pipe, i thought this would probaly due to having too much coolant / expansion from being hot as it didnt seem to be boiling.
The only thing I can think of is that the waterpump isn't circulating coolant through the engine properly and that is why the otter switch has not making contact. But I would have thought if this was the case,the bike would have over heated???
Has anybody else had this problem?