DYRABREST Motorized Bicycle Kit 49CC 4-Stroke Gas Petrol Engine Air-Cooled System Single Cylinder Chain/Belt Drive Scooter Engine Conversion Kit for Normal 28' V Frame Bike and 26' ATV Bike

Installed in less than a day. I’ve installed multiple of these kits. Comes with everything needed to install.. however i would strongly suggest getting a sized adapter for the rear wheel sprocket to drive the chain. Most bikes have a 1 in to 1 and 1/2 hub that it presses on to instead of messing around with the compressed fiber donuts they give you to mount the sprocket to the spokes of your tire. You will save yourself half a days work because you don’t have to align and re-align your sprocket tightness a million times to keep the chain from falling off. I also suggest a link breaker to shorten the size 415 chain instead of using the chain tensioner included. Chain tensioners have a tendency to slip inwards and destroy your spokes. What makes this kit worth every penny is the transmission it comes with. It comes with the best option which is the doubled up gears with a dual chain drive with beefy housing to the drive chain. This sucker is hard to break and smooth as hell compared to the belt drive or single gear and chain drive.

I bought three motors and have had problems with all of them. Two of the cluches went. Both bright belts snapped, the both coborators pour gas out the over floor. This is all work on three things of riding it. I'll return all of this for and elastic bike. Seriously you're motors are no good. The second one I bought had a belt spindle. This is why I don't like outsourcing. It's all cheap labor there for not put together correctly. How do I get the gas to stop coming out of there over flow

I've had several of these bike engine kits and they've all done what was expected . This one the engine is good it is a bit hard to pull and will rip the chord from your hand . But this clutch slipped from the start after a little warming up it grabbed better . Went to work two days and the third day clutch was smoked . I really need this bike to get to work . How can I get a replacement clutch ? Over all extremely disappointed . About to loose my job . I'm 56 years old . This is really a poor quality piece .

I had high Hope's for this item but so many pieces were faulty! Things were broken and things are missing not to mention measurements were off. On top of all of that amazon won't let me return it bec it's an engine?!?! Please dont waste your money just get something better.

It came without a manual or assembly instructions. It turned out to be an easy install, but for someone who has never done it before (me), that can be a little intimidating. But I just watched a couple of YouTube videos and I was good to go.The engine started up on the second pull, and has started up reliably ever since. It doesn't have a lot of power so you need a running start to get up a steep hill ( and you still might not make it), but it works fine otherwise. I've been having trouble with the chain, but that's more my fault than anything else, I didn't have it adjusted the right way, and it kept falling off. I figured it out and it stays on now, but if I would have had a manual, or instructions other than a couple of pictures, I would have done it right the first time. The instructions were just a few lines of text running down the side of the single page of pictures which were the installation instructions. The instructions were hilarious. They were written by an educated foreigner who knows the English language but has no idea of how to speak it. But I'm happy with the finished product.

Muy bueno

Chain drive torque converter transmission has very poor power and speed(made for child under 40kilo) Ad states BELT or Chain drive torque converter available. The Chain is JUNK. They are ONLY shipping Chain and are out of belt. The description says CHAIN DRIVE ONLY. Do not chose the belt and expect belt. The motor runs well.

Really good easy to install it was delivered to wrong location but the other person brought it to me and clutch gave out at second day other than that it perfect