Yamaha Crux is a popular bike in India and although it offers great performance, it does have some common problems. Starting trouble is a common problem that is caused by a lack of maintenance or improper tuning. Low mileage can be caused by a lack of proper maintenance, overloading the bike, or incorrect fuel mixture. A blocked air filter, a dirty spark plug, or a malfunctioning fuel pump can all contribute to poor pick-up. Low brightness of the headlamp can be caused by a weak battery or a faulty bulb.