ankle clonus (foot clonus) a series of abnormal reflex movements of the foot, induced by sudden dorsiflexion, causing alternate contraction and relaxation of the triceps surae muscle.toe clonus abnormal rhythmic contraction of the great toe, induced by sudden passive extension of its first phalanx.wrist clonus spasmodic contraction of the hand muscles, induced by forcibly extending the hand at the wrist.oe clonus abnormal rhythmic contraction of the great toe, induced by sudden passive extension of its first phalanx. wrist clonus spasmodic contraction of the hand muscles, induced by forcibly extending the hand at the wrist.
Best Answer: Motorcycles are generally louder because of the length of the exhaust system, comparatively to an automobile. The shorter you go, the louder you get.
The Bottom Line. This product will silence your exhaust a little bit, but you may find out as I did that exhaust noise is only a fraction of the racket made by your ATV or UTV. I think the Silent Rider does all it can, but it's not much and in my case it was far from enough to really silence my ride. Pros. 1  Made in USA.escription. 1  Not a muffler replacement-the Silent Rider works with your muffler. 2  After welding (or bolting, for some models) on the adapter, the Silent Rider slips on and off relatively easily. 3  Reduces the exhaust noise produced by your machine.