







🏁 Ride Fast, Ride Smart — Own the Dirt, Own the Moment!
The SUNDERWELL 40cc Mini Dirt Bike is a compact, 4-stroke gas-powered bike designed for teens and young adults. Featuring a no-oil-blend engine, pull start, and chain drive, it delivers speeds up to 19mph. Equipped with front forks, rear shock absorbers, and cooperative disc brakes, it ensures a stable, comfortable, and safe ride. With a max load of 165 lbs and a sleek green design, it’s the perfect starter bike for outdoor thrill-seekers.



















| ASIN | B0FGXFVBG6 |
| Best Sellers Rank | #570,428 in Automotive ( See Top 100 in Automotive ) #156 in Motorcycles & ATVs |
| Customer Reviews | 3.1 3.1 out of 5 stars (21) |
| Item Weight | 55 pounds |
| Item model number | DB4S004 |
| Manufacturer | BKAA GROUP CORPORATION |
| Manufacturer recommended age | 13 - 20 years |
| Product Dimensions | 51.18 x 31.1 x 22 inches |
| Release date | July 7, 2025 |
T**G
4.5 stars
Great starter bike. My son loves it. 10 year old. Only thing is packing can be more durable please. Came in with a broken front fender due to delivery issues.
A**R
Disappointed
When I purchased this bike it clearly said 50cc in the description. I received a 39cc bike and I notice the description changed. If I hadn’t already put it together and started it, I would return it. The engine doesn’t run that great and I’m very disappointed in the false advertising. I would have bought a different bike. I see others have also had this problem.
A**R
Great starter dirt bike for the price!
Great starter bike for my 7 year old grandson. Seems well made for a Chinese product. The seat is not soft but ok for a kid. Love the disc breaks on front and rear. Also love that all the hot areas around the engine are covered with plastic. Shipping was fast for me. The first one I ordered, different bike and supplier, didn't tell me until I asked a week later that they did not have it in stock. gave me 5 days left to find another. Glad it happened as this one is a 4 stroke, less carb issues in my opinion than the 2 strokes, and this one came in 3 days after ordered. Very impressed and saved my grandsons Christmas! One issue I had on assembly was the front caliper bolt was on so tight, I had to use vise grips to loosen it so that I could install the second bolt because it was bending my Craftsman allen wrench. It comes with one bolt installed and the caliper tilted up for shipping. So far it starts pretty easy however every once in awhile the puller doesn't engage the engine. Not sure if this is going to be problem in the future or not. But for me I push the priming bulb 4 times, close the choke and it starts on the first or second pull. So far very happy with it.
A**R
Didn’t work at first
Got the bike and the pull string was broken. I spent two hours fixing it, but afterwards it ran fine.
M**N
Best Christmas gift
My grandson loves his little dirt bike and never gets off of it!
H**R
Missing screw that hold that in place
Missing the screws to hold
T**T
It showed up completely broken and missing 4 bolts
It literally showed up broken and ruined my 6yr olds Christmas morning. Save your money and don’t buy this garbage. Please
C**T
so fun
My 10-year-old nailed it on the first try! So stable and fun. The look on his face was priceless! Best surprise ever. He's on it every day after school. Total success.
Trustpilot
2 weeks ago
2 months ago