Dear friends, live in Brasil and own a WR450 13 since new when It was incredible lean and unable to ride. as the WR ECU is locked for tunning i bought a YZ450 ECU and a Yamaha FI Tuner tool. After adjusting the maps the bike was great and we are leaving very happy a couple of months ago when she is dying on me for no reason. Orange light flashes and it dies. Turn off and on starts ok and then orange flash and dies...sometimes it does it for 8 times and suddenly it rides without any problem until new orange light flashing and dies again... Tested the lean angle sensor and its working ok but understand that the YZ ECU does not have this function and leaning the bike does not make any difference. Have no support from Yamaha shops here so im willing to buy the yamaha diagnostic tool in order to find out what is the problem with my bike. Any tips on above symptoms?? Any tips on where to buy the Diagnostic tool. Many thanks in advance and sorry for my poor english.