I have found the answer to my question. I've installed the dynojet kit successfully.

Big Gun Evo X
Dyno Jetkit for KLX300 2.5screws out
Sunstar 45t rear sprocket
Renthal Chain
Renthal McGrath bend handlebars (a must, so much stronger)

Should I go with the 13t front sprocket?

I'm talking to myself

 

im runnin a 46t rear sprocket. that seems like a fair trade for road/dirt for this bike. i tear it up the dirt but still ride back and forth to work. not sure how a 13/45 would be with some road travel. but.. on the upside.. cs sprocket is only like $25-30 and u wont need a new chain to run it and, it takes 10 minutes to swap back to 14t cs sprocket if u need the speed for road.