LIYUANJUN 4 Stroke Racing Engine, 140cc Engine Horizontal Motor with Gear Shift Lever Single-Cylinder Motor for Honda CRF50 Pit Dirt Bike 4 Speed Manual Clutch 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. LolOverall 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

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.

Just opened my 3rd engine from them and there is motor oil on outside. The first 2 are still doing good haven’t had issues feels a little slower but probably need to be fully broken in!! Sure it happened during the shipping the foam was cracked pretty bad so hopefully it wasn’t dropped or rolled over. Kind of scared this one was damaged in the shipping process will do update after test!

this engine came back sooner than i thought so far i am happy with it and i would say try it you will love it.

I ordered the 125cc engine for an application listed in the description. There are major safety concerns if installed. Brake lever is not usable, foot pegs are not usable, kick stand is not usable, intake does not line up, exhaust does not line up. I tried to return the item over my safety concerns I have received nothing but a run around and told I would have to track the return and notify this seller that it was received at their warehouse then I could request my return and pay restocking fees and shipping. I received the item 26 hours after purchase, made to wait 72 hours for return label to then find out I would loose additional money to shipping and restocking. Please do not purchase from this seller. They purposely make it very difficult and not worth the time or money to return rendering you stuck with the purchase. I filed complaint with Amazon and waiting to hear back. Also do not buy any Protection plan because it is worthless and will do nothing to help you in any situation.

So after installing, tried to see if there was a spark, which there wasn’t, I gone through two starter coils and three wiring harnesses before I found out that the magneto needed to be adjusted but the outer cap to the magneto was not right had to use my old one before I got it to park but definitely should have put somewhere on there that this may need to be adjusted Because I don’t think the normal person would even know to do this countless videos before I found one that told me what to do other than that runs great looks great and would buy again

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.

Keep your old motor, you'll need the spare parts. So far I've used the old oil pan (new one damaged in shipping) and the starter solenoid (burned up before the engine started the very first time).Also the shift pattern is backwards for most. Down to upshift and vice versa. I believe that's typical for put bikes, but weird for a quad. Motor runs ok so far, shifting is rough but may be just breaking in. You get what you pay for though and this rig was very reasonably priced. I would suggest shipping insurance though if you don't have a spare motor lying around.