Hey guys, I just finished my first MB build using a 60cc China HT engine. It runs just fine but I'm getting these unbearable vibrations in my hands the faster I go. It's so bad that anything above 1/2 throttle hurts my hands really badly. I've tried putting sand in the handlebars to weigh them down and I have one of those olde stems with rubber bushings that are supposed to dampen vibrations but this isn't enough. I've tried searching the forums but I'm having difficulty finding the information that I need. Any help would be greatly appreciated! PS: My top speed is 30 mph with the stock sprockets on the 60cc engine, is that what I should be expecting form this engine?