The bike itself didn't move around much at all. I had four straps holding it down, the two back straps were hooked to the receiver. That being said, the CRF250L is a 300lbs bike, a pig for a 250, but fairly light compared to some of the bigger bikes so your mileage may vary. I do plan on welding angle iron to the bottom of the platform to lock it in place. Right now it is two pieces bolted in the middle with four bolts on either side. As an aside, I have an unopened receiver mount hauler that I ordered from Harbor Freight. http://www.harborfreight.com/400-lb-receiver-mount-motorcycle-carrier-99721.html It didn't make it in time for my trip up to PA so I bought the one from Northern Tool to get me through the trip. If anyone is interested I'd be willing to sell it, otherwise I'll be taking it back to the local store tomorrow to get a return.