Yamaha fz is very poor bike its mileage to poor only 20 to 30km/l.so I think it is not better for you .it is four stroke singal engine.in yamaha fz mainly fule problem in huge amount .its rate is too high .it is a149 cc bike not fantastic.
its bore and stroke is 57.5mm*57.9mm.its compressions ratio is 9.5:1.starting method is electric.fuie suppiy type is fule injuction.it have only 5 gear not bettr.transmisson type is constant mesh 5-speed