Where can i get a 520x47 tooth alloy rear sprocket for a NC30.
cheers.

Doesn't matter as I doubt you can physically fit it - It is tight as hell with a 44 and I reckon 45/46 might be impossible. There will be no chain adjustment at all.

47 is wishful thinking...though would be impressed if anyone had done it?

Would be interesting.

HRC Kit came with 37 - 43.

Why do you want to add 7 teeth over stock to the rear though!? Why not knock some off the front instead?

AFAM dot a 13T front sprocket which is like having a 46 rear.

Chain working load is going to be higher using a 13T front as opposed to a 46 rear but there isn't a lot you can do with fitting large rear sprockets.

I need this for my 4-6 hybrid,i'm using the NC30 Swingarm,recommendid gearing is 14.45.I would rather use a 15 front to leave me a little more room so that leaves me with 46,or 47 rear,CMSMJ1 i can space it off the swingarm.

well, if NSR250s and RC30/45s can be had in 47 you are right..