125CC 4-Stroke Engine Motor Kit, Single Cylinder Air-Cooled Motor Engine for Honda CRF50 XR50 CRF70 Z50R QR50 Dirt Pit Bike, Engine Kit with Manual Clutch and PZ22 Carburetor

Great little engine! Fast shipping! Got this as a replacement for one of the kids little off-brand atvs. Bolted right in. Sounds great! East to install. There was no instructions for the wiring harness so there was a little trial and error hooking it up but works great. Starter solenoid died after cranking it over less than 3 times trying to get it started for the first time but luckily I had the one off the old harness. Get a better air filter. The one in my kit was just foam and already ripped and crumpled. Oh and the shift lever is unusable in my application. I honestly don't know what it would actually work in. Lol Overall is it perfect? Nope. But I still have it 5 starts because, the shipping was really fast. Faster then expected by 3 days! Engine is nice. Sounds good. Direct bolt in replacement. Some of the accessories that came in the kit were a little chincy and unusable. Overall it's a great deal

This rating should be lower but the actual engine runs great, fit well and the price is incredible! Reason I would have rated lower is the CDI it came with did not work, luckily the old one did. The pipe from cylinder to carb had a hole casted in it rendering it useless, again, the old one worked. This could be good or bad but since I hate wiring, it was bad to me... It comes with at least twice as many wires as I needed. Again, this could be a positive for some.

Kids love being able to ride their bike again! Came as it was described good quality at a great price. Super easy install!

Fantastic engine and customer service the engine showed up early and was in perfect condition besides one cable that got pinched and cut but I messaged them and they refunded me some money to purchase a new one. Can't complain with that, thank you much! And for anyone wondering how to wire the engine I've attached a picture from the Internet on how it's done.

Okay, Engine got here today was supper excited so I installed it for my son so we could go out for a ride. Well the kick start only engages like 1 out of every 5 or 10 kicks. Okay got it started let it idles for 2 minutes shut it off, now go to start it again started up but the engine started to make a horrible noise so I let it cool down check oil and gas it’s all good still. Go to start it again NOW it won’t even kick over at all seems locked up! Waiting on a response from seller supper disappointed for spending over $350 on this engine and shipping.

We ordered this motor to do a rebuild for the second time me and my boys 3, and 5 years old but right away out of the box we had issues got the motor put together and tried to fire it up but we were not getting spark at all we tried everything even replaced the stator plate spark plug coil and ignition switch then last but not least the cdi and we finally got spark but it still wouldnt start and then i decided to use my old carburetor from a previous motor and two weeks after buying it we finally started the motor and took a drive yesterday afternoon now i will say we did purchase the premium 4 year protection plan but we decided to take the time ourselves and work this brain scratcher out ourselves but iam wanting to have my stator plate and carburetor replaced due to it belonging to my other project bike but this motor was garanteed to start with everything it was shipped with but all in all iam pretty impressed great motor excellent performance now i will say the first time my boys an i built this bike it was stolen from us twice in one week we got it back both times with our own hard work but this bike is a family hobby for me and my growing boys as we are all 3 of us new to the power sports world this being our first bike but second time we built it.

Starts pretty easily. Idk how but I ended up with a small crack in case near rear motor mount which leaks a little oil not sure how it happened. Box arrived destroyed and engine was covered in oil in a bag. Sounds pretty healthy otherwise

Great engine but what size chain does it take