Hmm. Deeply suspicious. First of all it *cannot* be the resistors themselves. Any one of these failing would remove one motor speed but not all of them. Also intermittent failure would be unlikely.
The original S2 blower motor had a problem that the fan blade could foul the cowling and would blow "snow" in through the vents (where the snow was molten plastic off the fan blades).
If Ali get's a burning smell that could imply the motor is stalled and overheating - perhaps because the fan blade is locked against something - or it could be the fan blade itself burning as it rubs against the cowling.
Rather than just replace the motor and resistor pack someone should diagnose what is actually failing, because assuming they're replacing like for like and given that we have at least 3 or 4 similar failures on this list, it will surely fail again.
BTW, on my old S1 it was clear that the cowling had cracked, perhaps from impact damage when a previous owner off roaded it
The mass of the motor is suspended on the end of the cowling with no metal support - heavy impacts and track use will put a lot of stress on the cowling and might well cause it to crack or deform - once it does that, the fan blade can get jammed.
At least one of you could ask to see the removed fan unit to see if there is any evidence of cracking of deformation.
Cheers,
Robin
. . . . You never know!!
