15 tooth sprocket

[StrRacerX]

What do you guys think about my setup:

-pipes (fnf fatties)

-jets

-two filters directly on the carbs, no box

-cool head witrh 21cc domes

-lighten flywheel and + 4 degrees

for rear tires i am running haulers, 10 paddles, 20x10x10

 

Any suggestions on what size gear i should run, I currently have 13t.