I recently bought my second bike, a lowered VTR250. The previous owner was almost my exact weight and height so it was an obvious choice, since the bike was configured to suit her. Both tyres, although road worthy, were squared off and I had the front tyre replaced almost immediately. I mentioned to my mechanic that it felt ‘light’ in the front. He agreed and said that it was too low in the back and I should really have it adjusted. He asked that I not wait too long to get the adjustments made. The next day, I missed seeing a deep depression in the road. Not a pot hole as such, as it had bituman in it. It was close on dusk and I had just scanned for kangaroos. I hit it at 100kmph and ended up with what I called the ‘death wobbles’. I came out of it okay, and kept riding, keeping watch for any unusual vibrations. I checked the bike when I got home and there was nothing obvious. The next day I booked it in for the work. New rear tyre, suspension adjustment and a few other odds and sods and a thorough inspection. As my mechanic said, there’s nothing we don’t know about it now and it should be fine. Our road, although black top, has these annoying ripples at certain intervals, almost like outback corrugations and I’ve had previous experience with a loaded trailer that produced enough bounce to bend the axle. The other night, I was hitting it a bit harder than usual on the bike and got a similar reaction to my first wobble, but not as bad. Again I came out of it okay. So I’ve been researching the dynamics of a ‘tank slapper’ if this is what it is and understand why it happens. Obviously I was at the ‘critical speed’ required to induce the imbalance. As a learner, I’ve been unlucky enough to have had two in as many weeks even though the bike is much more stable now. I’ve searched the forums, but there is no existing thread on the subject. At the very least I’m hoping that this thread will add to the knowledge base. My question is…..how common are they? Should I have the bike raised back to standard? Is it my bike or is it the road?