gk73a

[vfrfrank]

hello all in nov 07 passed test wanted to get bigger bike decided on gsxr400 found one cheap a street fighter bought it was loving it then oil leak started near exhaust headers so i bought new head rocker cover and had done on 13 sep 08 was running great until 30 sep 08 when pulled in garage put petrol in and died upon inspection found crank had seized so thought its terminal replace engine found another engine running cost £240 fitted it misfired checked carbs found twoneedles partly missing in carbs so bought second set carbs fitted still backfiring removed bought 4 new needles fitted still back firing nomatter what i do it still backfires constant can anybody help out as patience is wearing thin just want it to work changed o rings both sets carbs +needles any assistance would be greatly appreciated thanks all