--- product_id: 561824805 title: "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" brand: "liyuanjun" price: "£168.06" currency: GBP in_stock: true reviews_count: 5 category: "Liyuanjun" url: https://www.desertcart.co.uk/products/561824805-4-stroke-racing-engine-140cc-engine-horizontal-motor-with-gear store_origin: GB region: Great Britain --- # 8kW max power @ 7500 RPM 4-speed manual clutch precision 140cc high-displacement power 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 **Brand:** liyuanjun **Price:** £168.06 **Availability:** ✅ In Stock ## Summary > ⚡ Power your ride, own the trail — no compromises! ## Quick Answers - **What is this?** 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 by liyuanjun - **How much does it cost?** £168.06 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/561824805-4-stroke-racing-engine-140cc-engine-horizontal-motor-with-gear) ## Best For - liyuanjun enthusiasts ## Why This Product - Trusted liyuanjun brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Kickstart Your Adventure:** Reliable kick starter ensures instant ignition, no battery needed. - • **Race-Ready 140cc Powerhouse:** Unleash 8kW of peak power with precision bore and stroke engineering. - • **Built for Mini Trail Legends:** Fits iconic models like Honda CRF50/70, Z50, XR50, and more for ultimate customization. - • **Complete Engine Kit Included:** Everything you need—engine, carburetor, CDI, kick and gear levers—ready to install and ride. - • **Smooth 4-Speed Manual Clutch:** Experience full control with a responsive 4-speed gear system designed for racing agility. ## Overview 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. ## Description Specifications:Type: Single-cylinder, horizontal, 4-strokeGear: 1N234Ignition: CDIDisplacement: 140ccBore x Stroke: 55mm x 59mmMax. Power & Corresponding Speed: 8kw(7500±375)Max. Torque & Corresponding Speed: 9.5N.M(5000±250)Start Mode: Kick starterCompression: 9.0:1Engine Oil: 900ml, 15W/40-SE, 4 strokeOil GEARS: 4 SPEED MANUAL CLUTCH, 1N234SPROCKET: 15T 428 17mmPackage includes:1 x 140CC ENGINE1 x Kick Starter Lever1 x Gear Shift Lever1 x set Package1x Carburetor1*CDI Review: 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 ! Review: 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. ## Features - 【Wide Application】(For the reference)The engine fitd for HONDA CRF50 / CRF70 / XR50 / XR70 / Z50 / Z50R / CT70 Mini Trail / Z50 / Minitrail Monkey / XL70 ST70 / QA50 / QR50 / CL70 / SL70 / 70 Passport / ST 90K2 / ST 90K1 / CS 90 / SL 90 / ZB 50. Please note this is not a guarantee, if you are unsure, please ask your local dealer. - 【Main Parameters 1 】Gear: 1N234; Ignition: CDI; Displacement: 140cc; Bore x Stroke: 55mm x 59mm; Max. Power & Corresponding Speed: 8kw(7500±375); Start Mode: Kick starter; Compression: 9.0:1; - 【What You will Get】This 4 stroke racing engine kit includes 1 x 140cc engine, 1 x kick starter lever, 1 x gear shift lever, 1 x set package, 1x carburetor,1xcdi. All of these can be your good help on your travel road! - 【Main Parameters 2 】Engine Oil: 900ml, 15W/40-SE, 4 stroke; Oil GEARS: 4 SPEED MANUAL CLUTCH, 1N234; Max. Torque & Corresponding Speed: 9.5N.M(5000±250); SPROCKET: 15T 428 17mm - 【Quality Assurance】We have a strict quality assurance system, and products are tested before they are put on the market. If you encounter any problems, we will provide the best service and give you the most satisfactory answer! ## Technical Specifications | Specification | Value | |---------------|-------| | 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 | ## Images ![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 - Image 1](https://m.media-amazon.com/images/I/61yernKYm7S.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great exsperience *by E***L on April 8, 2026* A great experience we had one come in broken but seller replaced it no issues and they work great and the sellers are wonderful ! ### ⭐ Not worth it. *by J***R on February 3, 2026* 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. ### ⭐⭐⭐⭐ Not a Honda but close *by S***Y on December 20, 2025* Good for the money ## Frequently Bought Together - 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 - Mighty Max Battery YTX4L-BS - 12 Volt 3 AH, 50 CCA, Rechargeable Maintenance Free SLA AGM Motorcycle Battery - AloneGoer GY6 Racing Ignition Coil SSR 125 A7TC Spark Plug Wire for 50CC 150CC 110CC 125CC 80CC 90CC Moped Scooter ATV Go Kart Pit Dirt Bike Engine Motorcycle High Performance Parts --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/561824805-4-stroke-racing-engine-140cc-engine-horizontal-motor-with-gear](https://www.desertcart.co.uk/products/561824805-4-stroke-racing-engine-140cc-engine-horizontal-motor-with-gear) --- *Product available on Desertcart Great Britain* *Store origin: GB* *Last updated: 2026-04-23*