Ambienceo Lifan Complete Engine 125cc Long Case 4 Stroke 1P52FMI-K (124cm3) Dirt Bike Engine Motor Carb Complete Kit for Honda XR50 CRF50 XR CRF 50 70

Pros:Mechanical portion of the install was straightforward on my CT70.Engine runs strong (once tuned).Cons:For some reason I was under the impression that the motor came with a 420 sprocket. This motor came with a 428.The engine drips a drop or two of oil after each run.I had to spend quite a bit of time tuning the carburetor (including purchasing a jetting kit). The jets that came with the carburetor were not labeled with their sizes, so tuning was a complete guessing game.Instructions were minimal and did not include a wire diagram.

Installed motor correctly changed the factory oil with the right oil and capacity ran the motor did the right break in procedures, engine started smoking a lot when it got up to temp and started to not run right, oil started coming out of the exhaust .

Great motor..........basic wiring harness/red/black/blue/white/and green/comes with a ground/ground that to the engine cover/ and this model you will see that the Coil only has one wire yellow/black so to ground it to the frame then you will get spark, Warning buy a a kill switch

Make sure to buy a 428 chain, 428 rear sprocket that fits your bike, a 39mm air filter, and a clutch cable and clutch perch if you are converting from a clutchless bike like a crf50. Engine fires right up. Must use all your old hardware from old engine to bolt new engine onto frame. 2 carb nuts and 2 exhaust-post nuts were missing. home depot had the metric size.

The product is a plug and go it sounds strong and starts in one kick doesn't go very fast for a 125cc hell a 49cc gos the same speed need more work on speed but all in all its a good one

Change oil before starting and it's a great engine

Works really great nice quality

Major frame mount modifications needed to fit.