No not an advert, had my first 4rt bike problem yesterday at the Vic when it kept cutting out for no reason? got back to the van though thank fully. Had a look today as my first thought was a blown plug. Changed it along with fresh fuel and air filter and as usual she fired up first kick, let it run untill the fan kicks in but it died again after about 5-6 mins. Realised it died because the fan was stuck, looks like the bike shuts itself down(hopefully) instead of mashing the fan or boiling the motor. Rang Gizza earlier to ask if his fan span freely as mine was'nt so just posted this as we thought it was quite clever.
Bike all sorted now though and running as normal, but re-aligning the fan was a little fiddly as the rad had to come out, pretty sure it took a knock from a stick/branch when I layed it down to walk a section