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I have an '07 M8. The last time out it started to develop a low end bog. When I would hit the throttle some times it would about throw me over the bars. If I let off it would usually take right back off just fine and run great. As the day went on it seemed to get worse. My first thoughts were maybe TSS switch but at certain times if I held the throttle in the right place it would continue to bogg or run like Blaaaaaw for as long as I held it in that position. I thought if it was a TSS switch it would die. I never could get it to die. I have also noticed this season after coming down a long steep hill it seems to load up a little. Could it be a broken reed maybe. It seems to idle fine. Deflection, rollers and clutches seem good. Thanks for any input.