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⚡ Power your ride, own the trail — no compromises!
The LIYUANJUN 140cc 4-stroke horizontal racing engine delivers a robust 8kW power output and 9.5N.M torque, optimized for mini trail bikes like Honda CRF and Z50 series. Featuring a 4-speed manual clutch and kick start ignition, this complete engine kit includes all essential components for a seamless upgrade. Engineered with precision bore and stroke dimensions (55mm x 59mm) and a 9.0:1 compression ratio, it promises reliable performance and race-ready responsiveness for millennial riders craving both power and control.
















| ASIN | B0CG9QN7JN |
| Best Sellers Rank | #50,580 in Automotive ( See Top 100 in Automotive ) #12 in Powersports Engine Kits |
| Brand Name | LIYUANJUN |
| Customer Reviews | 3.7 3.7 out of 5 stars (8) |
| Manufacturer | LIYUANJUN |
E**L
Great exsperience
A great experience we had one come in broken but seller replaced it no issues and they work great and the sellers are wonderful !
J**R
Not worth it.
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.
S**Y
Not a Honda but close
Good for the money
L**T
The quality of customer service is outstanding
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.
J**.
WTF
was running nice for a little less than a month or just under ten hours and then the right side engine case popped and sprayed hot oil all over my leg. P. O. S.
Trustpilot
3 days ago
2 weeks ago