Whats happening everyone, I'm from San Diego CA. I own a 2008 TRX 400ex. Cosmetically I have a Blingstar iron cross bumper, Renthal Handlebars, Spyder girps, ASV clutch, and break levers, Tusk nerf bars powder coated red with black webbing, ITP Sandstar tires, and skin red and black flame shock covers. Performance wise I have an HMF performance pipe powder coated red and black, K&N cold air intake and power lid, Curtis sparks 6 degree timing advance key, 168 main jet, stock pilot (no lag in throttle response), and a needle from an 01 trx 400 ex set to the highest 3rd notch, because the 08's needle isn't adjustable. I run a 50/50 mix of 93/104 octane, because of the timing advance key. She's purdy quick, and there is no better place in the world to turn a REX loose than the Cali dunes. I was wanting to know if anyone else is as happy with the Curtis Sparks timing advance key as I am. For the cash it's totally worth it. I'm holding on to the stock key, just in case I decide to bore it out. I have heard the big bore bikes run super hot with that ignition advance key. Curtis sparks doesn't even recommend using it with big bores.