Yes I have just sold my Super Rok. Make sure that the valve sits perfect in the cylinder, and can move very easy up and down, if you remove the top cover, and move it by hand. Allso make sure its clean from carbon deposit, same goes for the hole the valve sits in. Finally check for any leaks around the membran.
Have you played with the tension on the valve with the red plastic screw ?? My motor builder told me to screw it all in, and back out 10 notch. SuperRok is more a “top rev. performer”… my x30 has a better mid range than my old SuperRok.
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