I want to do the 520 conversion but can't find a company that has the parts. I know they are out there because I've read reports of it being done. I've sent a lot of emails to sprocket manufacturers but nobody is replying. Does anybody know if the ZX10 or Z1K is the same fit as the N1K? Considering all the bikes I've owned this one is by far the hardest to get aftermarket parts for.