4 stroke Flying Horse is a lot quieter, runs extremely well and no problems at all.
I modified the drive train, locking the flyweight clutch and adding a Max Torque to the 5G tranny output shaft.
Now it powers right up, no peddling and accelerates even uphills. And I weigh 235#!!
Great product, great company. I'll be doing more business, guarantee!

I would like to call this the first time in all my bills of using a real engine most of all I've used the little China girls I've read the reviews on the flying horse and I am so excited to mount this on my friction drive shopper today bikeberry has been wonderful wonderful in their delivery time and customer service I will give more reviews once I get it up and running praise bike berry I've made orders from the major internet retailers with their third party Chinese stores on hundreds of dollars of motorized bike parts and engines that disappointment is you never have the customer service and support that you do through bikeberry they are wonderful

Motor came damaged out of the box

I've put together 4 different bike kits! 1 60cc 2 stroke (my 1st build) 1 80cc 2 stroke. 1 49cc 4 strike from Walmart (the every thing and nothing store) not satisfied with the performance. And this one very satisfied! I found out 2 strokes are not durable for everyday use! This one takes me where I want to go with no problems!

This motor is amazing thanks bikeberry you guys are GREAT.

I put 14600 + miles on the old one.and I believe this one will do it too.very little maintenance on the 4 stroke engine

Everything went on my bike perfect. Only thing I had to do was add a spacer between the left side of my frame and the sprocket to make enough room for the chain to clear. Drove it over 30 miles lots of fun if you’re looking for a motor this is where to get it

Gets me around at a nice pace and sounds great keeps me moving and easy to use. Sits on the back and doesn't get in the way of pedaling. I spend about 1.50 every couple days sometimes the whole week. Great product.

I chose two 49cc friction motor before I installed them. Both 26” bike frames were too small for the chain drive version. I did buy one through Walmart but had to return it for lack of critical parts. Unable to order the part I returned it for full refund. Research led me to Bikeberry and I discovered the friction versions and took the plunge! No regrets! I did alter a few parts to accommodate the bike frames as I’m installing the second kit now. I am experienced in many skills and with many tools so I enjoy the challenges. Already I’m dreaming a new kit. So far so good and Bikeberry has been a wise choice of kits, bikes and accessories. You won’t go wrong as they are customer/service minded!

Decent motor so far so good

Started on the second pull.It now starts on the first pull.Everything was in the shipping box,good engine.Thanks.

Great engine kit Especially if you are not big into customizing motors or mechanically inclined

Good quality,and packaging was done right. All the pieces were there.

I am very pleased...precision motor is suprising...

Gotta say the friction engine starts east runs great and I’m quiet happy quit.

even though there were no assembly directions in the package I was able to get a video on u-tube. Since I know my way around mechanics I had the thing operating correctly after tweaking things a few times. It worked a lot better than I expected - goes faster than 15 MPH - nice little engine.

Well built

Great product, excellent support and online tools!!

I actually meant to get the chain drive build, however I am very impressed with the direct tire drive set up…

Motor wanted to slide down. Welded a small tab below it.

This motor is fantastic! BikeBerry is a great company to work with, so much so, we have a second motor on the way! Thanks BikeBerry for superior products but most importantly, your customer service!!

Great little kit I got nice running motor it purrs like a kitten really happy with purchase its a easy and quick kit to put together and to use

Haven’t installed yet, but looks good so far!!

Im very happy with my motor.

This is my 3rd personal 5G kit . I have built 11 friction drive bikes , 2 for myself and 9 for friends . And boy have I learned a lot on how to get many many miles on a build ..
My second build was back in 2015 that I rode virtually every and even at night , some of my rides were as many as 90 miles one direction . Before my last build was stolen I had a hard 3200 miles on it and possibly more when I forgot to clip on the digital Speedometer . If you build this kit the rite , with the rite bike , and you don't beat the hell out of it , It will last a long long time and get you where you want to go . Love This 5G Kit .

49cc Flying Horse 5G 4-Stroke Engine Assembly

The only thing I added to the engine is my exhaust pipe. Sounds better and engine breaths better

I understand it's holidays you know supposed to be good except for the flywheel broke spring came off

Decent Chinese motor. Over all this 4 stroke is a pretty decent motor. It's based on the Honda GXH50 which I also have experience with & it's a pretty reliable unit & at about half of what the GXH50 costs the price is hard to beat. Lots of RPM's to work with for it's size. The only real issue I had with it was the carburetor. The float kept constantly closing the needle valve forcing my engine to stall & refused to start after the first ride even with the carburetor properly tuned even tried cleaning it to no avail. So I decided to scrap the 4 stroke carburetor & replace it with a 2 stroke NT carburetor using a manifold adapter & runs flawlessly now. The adapter costed an extra $20 I think but well worth it.