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

Input:
Question: I have two boys--older is 9 and approx 58" tall, younger is 7 and approx 49" tall.  Is the MX650 too big?  What about MX500?
Document: We bought this MX650 for our 9 yr old son and he absolutely loves it. He had the MX500, but we gave it to our younger son. They both have a blast riding these around the yard. I would highly recommend this product.
This is the 2nd bike we ordered - 1st was an MX500 for my 10 year old and this one for my older son. I can't believe that on both bikes the back wheel broke almost immediately. The part that holds the chain broke off on both bikes. Razor sent out a replacement but having to call for a part within the first week of having it is unbelievable, especially considering the price! We have also discovered that this happened to a friend of ours also. Razor needs to fix this defectRazor MX650 Dirt Rocket Electric Motocross Bikebefore they continue to ship these out.
This is the second Razor that we have bought. My boys and 7 and 9 and they love it. Ride it all the time.
My son is 9 years old and this bike is great for him. It is not too big and he handles it very well. It goes through dirt and leaves very well. The battery life is good, if you keep it plugged in for at least 4-8 hours after you ride it. I thnk it is a great buy for a child as young as 8 or 9, eventhough the age says older.
My 8 year old son begged for MX500 for months. Surprised him with MX650. He and his 7 yr old brother love it. Bike is marketed for 16+ year old, but is sized for grade school kids. Performance is good. Although, I feel the acceration is a little slow in the dirt. Soft dirt defintely slows it down. Top speed is about 18 MPH on pavement. Does run for ~ 45 minutes per charge. My only wish/complaint would be to have the rear brake operated by right foot like a real motorcycle, the  MX650/500  comes with front brake on right hand and rear brake with left hand, which is opposite of thier (All) bicycles.
I bought this for my 9 year old son and he absolutely loves it. However, we were disappointed in the size. With a 220 lb weight limit we expected it to be a little taller and overall bigger. My son is almost to big for it. I wish we would have bought it for him when he was 6 or 7.
My boys love these motorcycles. I originally ordered only one of the MX650 models, but later ordered another one because the Mx550 we ordered  previously had to be returned to Amazon because of a defect. So far both bikes have been working great and I am very happy with the quality. Pretty simple to put together and depending on the weight of your child will run for more than an hour without recharging. They go pretty fast, so I would definitley recommend a helmet. I ordered these for by boys, who are 9 and 11.
Got this for my kids (MX650 version). They love it and I can ride it too. It's just like real motorcycle without the smoke. Great bike for kids and beginners. My kids are 7 and 9 and they fit on it fine.
Initially I was a little hesitant to purchase this model of the Dirt Rocket. My son was turning 9 yrs of age; and the product has a rating of over 12 yrs of age. So after some back and forth over the MX350 model I decided on the MX650 model. My kid is rather tall (roughly 50in at purchase) for his age and stands out among his classmates; so I figured he would adjust to the bike over time. First...I'm a PRIME member so the bike was shipped FREE; at 100 lbs, the membership is well worth the cost.
It was very easy. Razor provided all the tools and it only took us 30 minutes. This is a high quality product and I would recommend it for older kids (teenagers) because it does go quite fast (up to 17mph). Razor makes other models for younger children that go slower. I may buy the next one down in speed and size for my younger son who is turning 10.
Answer: yes