Hello guys! Im a new gsr400 rider. Bought the bike fr loois last dec. Then last month came this prob. My rpm is 'stuck' at 7-8.. so my max speed is only arnd 100km/h at gear 6.. throttle fully open but my bike seems cant speed up. No issue before this.. bike can go up to 170km/h or more.. some say to service the FI.. is it true? Any advise?