figured it out in the end ,but im really worried about the engine as its so hard to turn over ,and its not got the head on its had all seals and bearings replaced
6305R1 (16mm) Bearing Koyo Special Yamaha DT125R r/h Main I.D 25mm O.D 62mm x W 16mm £23.98 6305R1 (16mm) Bearing Koyo Special Yamaha DT125R r/h Main I.D 25mm O.D 62mm x W 16mm £23.98
If your crank is stiff. You have probaly over/unevenly tightened the case bolts that hold the case together. First of all get a rubber mallet and give the end of the crank on the clutch side a good few dunts to seat it in the bearing, if that doesnt work undo the crank bolts and re do them evenly at the right tourque.