Honda 300ex mods suggestions

[bigAl300ex]

I have a 2003 Honda 300ex with a few mods (HMF exhaust, K&N filter and pre-charger, Renthal bars, and nerfs).  I was thinking of putting a 330cc JE piston big bore kit (sleeves, gasket, rev box), bigger carb (maybe 38mm Keihn) and a 14 tooth front sprocket for bottom end.  I don't know if all this is going to put a significant increase in power (I know it will increase it some).  If anyone or knows of anyone who has done something similar like these mods that I'm looking at, please let me know any info. or any advice you could share wtih me.  Any info. or tips would ge greatly appreciated.  Before I spend the $, I want to know if it is worth it.  Also, please do not tell me to sell the bike and buy a 400cc quad .  In my opinion, the best kind of bike is a paid off one (LOL) !   

[KD 428]

if ur goin to put that much money in it just get a bigger atv (400ex) cause 300s arent very good for modding

[Dr.Dirt]

You would be better off buying a bigger displacement quad in the long run.