1) The chain slips if I pedal kick hard. erm i think thats to do with chain alignment, basically your rear sprocket isnt inline with your front chainring 2) The lock-ring keeps coming loose even though I tighten it hard. erm not sure maybe abit of plumbing tape (thin white tape) around the threads ?! but this problem might somehow be related to the next problem wait for someone in the know to answer... 3) When I pedal backwards the freewheel doesn't move. If that makes sense. So the chain becomes loose. dunno 4) And also can some one give me some advice on how to true my wheel, tryed and failed miserably . tighten spokes coming from the left of the hub means the rim will move to left, vice versa. Tightening three spokes in a row will make a big difference to the buckle, maybe try tightening two spokes in a row first just experiment really...erm thats as brief as i can put it.