Razor MX650 Dirt Rocket Electric Motocross Bike

http://tinyurl.com/h94bnz9 Reliable electric bike
Bike appears to be solid with the exception of the rear wheel sprocket assembly. It seems to be a common problem with this bike. After one week the rear wheel fell apart. Motor spins and the rear sprocket turns but the wheel does not move. Called customer service and Razor is shipping a new wheel. I'm pretty sure this will happen again as it's a very poor design. From what I can see there is no good alternative replacement parts. After the 3 month warranty period is over you are stuck buying a new wheel. Bike is used by a 6 year old around the house. Stay away from this garbage. If Razor would fix the rear wheel design this would be a great toy and I would give it 5 stars. In my opinion it's unacceptable for a toy like this to fall apart after one week of light use. 7/19/11 UPDATE: As predicted the rear freewheels broke again (one week after being replaced). Called Razor again and they are shipping a new wheel. After investigating the issue closer I decided to take the broken wheel to a local shop and weld the freewheel solid. This will eliminate the freewheel problem. It's not a perfect solution but it should get the job done and keep my son happy. I will post an update once it's tested. 10/29/11 UPDATE: Found a reasonable fix to my rear freewheel problem. I welded the rear sprocket solid and it works great but I wanted to investigate other options. Since I had few spare rear wheels (Razor warranty replacements) I purchased a brand new freewheel from ElectricScooterParts for $12 (I chose the cheaper one that looks like a bicycle rear sprocket. It replaces the original freewheel and the original bigger sprocket bolts right on top of it. The new sprocket work great, much stronger and more reliable. My son used the same unit the entire summer without any issues. Once every two weeks I lubricate it with lithium grease spray. Since I found the fix to the freewheel problem I purchased another mx650 for my 9 year old son from eBay for $180, brand new with missing chain(Amazons prices wend from $360 to over $500 at one point). Now we have two bikes which run without any issues since I eliminated the freewheel issue. 5/14/12 Update: Both bikes are still going strong. Looks like the front fork is falling apart on one of the bikes (Plastic internal parts started to come out).It's still usable but I started looking for a replacement. Other than that, things are still working OK. My rear sprocket mod is working great. On one bike I welded the sprocket solid and the other is still using the replacement freewheel I mentioned in the original post. This is a great bike. My 11 year old son loves this bike and rides it almost everyday. The bike has a tremendous amount of power. I weigh 190# and it carried me well on an initial test drive. My 11 year old son who has been riding electric bikes for several years does terrific on this bike. He weighs 65 pounds and is 55" tall. The bike seems to be perfect for him based on his size and experience riding. The bike is interesting in that it is extremely powerful but size wise is designed for kids 9-12 years old. The box says 16 and up, which is ridiculous. The bike seems well designed and has a nice suspension system and dual disk breaks. The price is unbelievable for what you get but I would only recommend it for kids 9- 12 who have experience riding other powered bikes. The tires are pneumatic however they are very hard and knobby. They are fine for off road use but a slip out fast on slick pavement. Over all a great bike for experienced 9-12 year olds who have a non paved surface to ride on. We didn't experience any problems mechanically or electrically. Razor MX650 Dirt Rocket Electric Motocross Bike