I've actually had the rear wheel lock and the engine stall when selecting a low gear a couple of times. The first time it did it in 2005 i skidded about 3 metres. I contacted the dealer to double check that they had really done the transmission recall and that it was not the transmission locking causing the wheel to lock. They assured me that it had definetly been done. So i asked if they could check with yamaha to see if there was any other problems that would cause the rear wheel to lock , the replied no. So i said to them that i was worried that if this happened at speed it could cause an accident. I told them to take record of my incident and that i would hold them responsible if it happened again. I will contact my dealer tomorrow and yamaha and see what they've got to say. Thanks for the information scorpionwarrior. ........Frec.....U.K...