I have a problem with my idler pulley on my Lazer. When I kick my blades in, (at low rpm's) the rear idler to the mule drive belt moves down , then comes up and CLACKS against the chassis. This is hitting hard, and has even bent the edge of the idler pulley. As I looked, there is no adjustment for that spring or pulley itself. What can I do to avoid this? I realize there is a tension adjustment for that belt, but it seems as though the slack is in the spring, itself. Have these springs been known to wear out, possibly? Any help is greatly appreciated. Also, if there are any other Lazer users that have experienced this, please let me know. Thanks.