Power Valve Tuner on 2005 YZ250

Ever wish you could change the power characteristics of your 2-stroke to suit track conditions?  Engine Dynamic's refined power valve adjuster enables you to adjust the exhaust port timing to suit your liking or track conditions.  For example, on tight SX style tracks you want instant power, by decreasing the spring tension the power valve will open sooner getting the motor into the high rpms quicker.  Conversely if you want a smoother transition you can increase spring tension to delay opening of the power valve