compression ratio YAMAHA YBR250 2007 Manual de utilização (in Portuguese)
Nothing was found :-(
Try to search something different in this manual:
  engine overheat, tow bar, octane, hood open, key fob, brake light, steering, child seat  
Popular in this manual:
AUX, lock, reset, spare tire, ESP, ECU, ABS, sport mode, clock reset
Or view whole manual here:
