My new 07 450e was beating me to death and I've got the sore back to prove it...tried some heavier springs I had on hand and still the beating went on...finally I laid over the seat of my sweet Berg and as I glanced at her rear end I noticed I was short on the stroke { shock stroke, gutter minds }... alas she had no gas { nitrogen } in her rear shock....Have any of you gents come across this malady?