Yamaha to add fuel injection to bike without altering the looks of the bike. I was disappointed when they displayed the new FI vesion at the auto expo since the short, stubby exhaust was replaced with a more conservative design and the rear tyre hugger was a real eyesore. Bike enthusiasts were met with further disappointed when Yamaha released performance figures and we found out that the new engine had only 13Bhp and engine size had been decreased from 153cc to 149cc in bid to increase mileage.