Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: Ok, could you use a 250 dirt bike for this?
Document: There was no indication prior to purchase that the ramp would need to be secured to another surface thru nails or bolts. My son saved up to buy this thinking he could use it on a sidewalk or road. He could not. It is too light to maintain any stability without being fastened to another surface.
nope, nope, nope. I bought this for my RC trucks.... to small, had to send it back. I can't imagine that kids would use this. If you want to get a ramp, your best bet is to build one. I just decided to build one for a few bucks. If you are thinking on getting this for your kid to jump his bike off of, don't, the ramp moves and that can be dangerous. Again, just build something that is safer.
I wasn't sure if the ramp would be right for my grandson; he wanted something to use with his BMX bike and this fit the bill! We were both pleased! The ramp comes with 4 screws meant to anchor the ramp but we determined that securing it would only be necessary for use with a small wheeled item (razor, skates...). The ramp is perfect for jumping his bike. Also, it is light enough for him to carry around and share with his friends.
Was disappointed in the product. It was alot smaller than I anticipated. I thought I was getting a bike ramp.
The ramp was a litte smaller than anticipated, however it is great starter ramp. Just the right size for my little man to practice his jumps with his bike, scooter and skateboard.
Arrived on time. Got this for my 9 year old son to jump his bike with. I like that it screws in the ground makes me feel a little better. He has a lot of fun with it.
Theis ramp is only the size of a lap top computer, it works well for remot control cars and such,but not very well for bikes and scooters. The ramp moves as soon as the bike/scooter hits it.
Not Ideal what so ever for skiing. I got it to practice low ground tricks like a 180 at least so go for it if you are doing it for your son or daughter with there first scooter or bike or skateboard NOT skiing.
I'm very disappointed with Amazon.com. It has a lot of good stuff but when I saw this I had to write about it. The bike ramps from razor and esportsonline.com are ridiculously overpriced. It's a little piece of plastic and it is selling for $20. I can get the same thing from a local BMX store for 1/4 of the price. Sorry, but until you start selling these ramps a little cheaper, I am not going to do any sporting goods shopping on Amazon.
Don't want to put holes in our concrete so my son can't use it the way he wants to.
Answer: yes