Edited sentence: 1994 YZF750 owners in the US complained of overheating problems especially in urban environments.Carbon build-up on valves may also cause the valves not to open enough reducing compression.Excessive oil consumption is a major problem with this engine even when new.Installing a jet-kit and adjusting the carburetors to a richer setting allowed the engine to run cooler and eliminated the carburetor "glitch".Power builds steadily, but really takes off at the top-end.Some users have to pour a litre of oil every several hundred kilometres.The 749cc in-line four-stroke engine, with five valves per cylinder, is rev-happy and the delivery is linear due to the EXUP valve.The Honda Fireblade and Suzuki's GSX-R750 tended to overshadow it on the road and the R1 has taken over on the track but the YZF remains an excellent bike.The overheating and carburetion problems may have been caused by an extremely lean carburetor setting from the factory.To get the best response it has to be worked hard.Valve clearance should be inspected more often than Yamaha recommends as this is a problem.When accelerating from a stop, YZF750R 155hp.Yamaha addressed this issue on the 1996 model by upgrading to a larger capacity, curved radiator.owners have also complained of a "flat spot" or "glitch" in carburetion at about 2000-2500 rpm