Hi Folks, Hopefully you'll have this information as I've been unlucky searching for it. I can't find any engine numbers reference for ZR250 Balius's. I have a 1998 ZR250B Balius with the motor swapped for the previous owner by a wrecker (the head gasket had blown so they swapped the motor!). It may or may not have the original carburetors, so I need to identify the model that the motor is for, to make sure that the jetting is correct to match the motor. I am completely rebuilding the carbs anyhow as the bike had been sitting unused for 5 years and the carb bowls were a clogged up mouldy mess. The engine number is ZX250CE 048632 Since there are variations of main jet, needles and pilot for the models, I'd like to know what model this motor matches - e.g. is it a 2000 B4 model for instance. Then I'll need to find what carb parts should match the motor, e.g. my current carbs have 95 main jets, N77V needles and 32 pilot jets, and unknown factory idle jet setting (1 3/4 turns e.g.) and a 1.5mm shim raising each needle. The previous owner said the bike never performed particularly well with this setup, and ran a bit rich, and it came with CR8E plugs which I understand are hotter than the recommended CR9E plugs. Anyhow, that magic bit of information will save a lot of time and experimentation, and would be much appreciated.