Im looking at some Driven Racing sprockets. Alloy rear and steel front in 520 pitch. Ive not had anything to do with them in the past. Are they ok?

 

I actually run their steel ultra light in the rear(or I think that's what its called) on my other bike and I have no complaints but that only answers half of your question.

 

The Brand name is fine, they make good sprockets.

I would not run a full Aluminum sprocket on this bike for any reason.
SuperSprox hybrid Aluminum / steel is my favorite right now.

 

Do the alloy ones wear to fast?

 

Yes

 

DO NOT run alloy on this bike unless you are stranded in the desert and need to get water. And then go real slow and check it every 10 feet for decintegraton.

Really, they are way too soft for a bitch-slappin' bike like the hawk.

They are OK on 125cc race bikes and even they eat them up.

Hardened steel chain beats soft alloy in every rock/paper/scissors match every time.