So I haven't even rode my timbersled Sx and already completely wish I bought a mototrax....I've searched everything on the chain issues and still un sure. Want to test my bike saturday and make sure its ready for the mountains. Bike is 2012 kx450f with 2016 sx120 kit. I have the 13 tooth sprocket on and the air at 225psi in tss to give more slack. idler wheel adjuster is backed all the way out. Chain is extremely tight. Like feel like it will snap tight. Chain is already a 1mm or less away from frame rub. So I probably can't put a 12 tooth sprocket on to get clearance and probably cant get one in time anyway. How do I avoid catastrophic failure saturday. And any good way to strech chain (chain and kit has 3 hours on it from previous owner)