Sprocket upgrade and rear chain guide question

OK, in reference to a rough chain on this post, my chain has some rough very stiff links.
https://wr250rforum.forumotion.com/t5154-rough-chain-action-noise

I am looking at increasing the gearing to an O-ring chain with a 14/50, rather than deal with fixing or replacing the stock setup. Any issues with this, I was thinking the 50 tooth rear puts the chain lower to the rubber (or maybe touching the rubber) on the rear sprocket chain guide.

Looking at a Sprocet Center Superlite RK purchase, with a 14/50:
http://www.sprocketcenter.com/p/1187393/superliterk-520-oring-chain-steel-off-road-sprocket-kit---yamaha-wr-250rx-08-10.html

Not looking for the best, but cost effective upgrade.

I'm running 14/49; I believe we've got several folks here running 14's and 50's. Here's a couple of threads:

https://wr250rforum.forumotion.com/t2506-put-a-50-tooth-on-today

https://wr250rforum.forumotion.com/t4675-14-49-sprockets-and-112-link-chain

Sarah