air screw
I have changed jets, but am new to this "tuning thing".
what are you running the air screw at?
Mine has all the mods, BBR exhaust, air box, flywheel, etc, but it still runs supper cold and can be tempermental to start. I tried the needle one step richer but when my daughter putt-putted around it fouled a plug.
I am back to stock on the needle, running a 110 main. will the 112.5 help the cold starts?
Any tips appreciated.
ps. my yz400 is a one kick wonder, hoping to get the ttr as dialed in too!