--- product_id: 45252781 title: "125cc Semi-Auto Engine 4 Stroke Motor for ATV Quad Bike Go Kart" brand: "zxtdr" price: "3354 zΕ‚" currency: PLN in_stock: true url: https://www.desertcart.pl/products/45252781-125cc-semi-auto-engine-4-stroke-motor-for-atv-quad store_origin: PL region: Poland --- # 4-Stroke Engine 3F/1R Gears 125cc Power 125cc Semi-Auto Engine 4 Stroke Motor for ATV Quad Bike Go Kart **Brand:** zxtdr **Price:** 3354 zΕ‚ **Availability:** βœ… In Stock ## Summary > 🏁 Rev Up Your Ride with ZXTDR's 125cc Engine! ## Quick Answers - **What is this?** 125cc Semi-Auto Engine 4 Stroke Motor for ATV Quad Bike Go Kart by zxtdr - **How much does it cost?** 3354 zΕ‚ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/45252781-125cc-semi-auto-engine-4-stroke-motor-for-atv-quad) ## Best For - zxtdr enthusiasts ## Why This Product - Trusted zxtdr brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Durable Design:** Built to last, this engine is perfect for both racing and recreational use. - β€’ **Feel the Thrill:** Immediate power boost that elevates your off-road adventures! - β€’ **Smooth Shifting:** Experience seamless transitions with 3 forward and 1 reverse gear. - β€’ **Easy Installation:** Upgrade your ATV or go-kart effortlessly with straightforward wiring. - β€’ **Unleash the Beast:** Transform your ride with a powerful 125cc engine upgrade! ## Overview The ZXTDR 125cc Semi-Auto Engine is a robust 4-stroke motor designed for ATV quad bikes and go-karts. With 3 forward and 1 reverse gear, this engine offers a significant upgrade from stock 50cc engines, delivering an exhilarating performance boost for both racing and leisure activities. ## Description Specifications:Displacement: 125ccType: Horizontal, single-cylinder, 4-stroke, air-cooledCompression ratio: 9.0: 1Front sprocket 420 - 17mm - 14TTransmission: 4-speed 3 forward 1 reverse gear Bore x Stroke: 2.06" x 2.19”(52.4mm x 55.5mm) Top Engine Mount : 92mmBottom Engine Mount: 82mm Bolt to Bolt :152mm (6")Rated Power & Rotating Speed: 5.8 kw/7500r/minΒ±375 r/minMax. Torque & Rotating Speed: 8.5 N.m/5000r/minΒ±250 r/minIdle speed 1500 r/minΒ±100r/minIgnition: CDIWiring:1. Five wires (Plug): For gear indicator2. Yellow wire: For storage battery3. Pink (or Yellow) wire: For storage battery4. Black & Red wire: For signal trigger5. Green wire: For grounding6. Blue & White: For trigger coil ## Features - This 125cc Semi-Auto Engine suitable for ATV 4 Wheelers Quad bikes - Speed complete racing engine, 3 forward 1 reverse gear - Upgrade your stock 50cc to this 125cc monster, you can feel the power difference immediately - See below description for more specifications and wiring. ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | ZXTDR | | Brand | ZXTDR | | Is Discontinued By Manufacturer | No | | Manufacturer Part Number | U-TD205-1 | ## Images ![125cc Semi-Auto Engine 4 Stroke Motor for ATV Quad Bike Go Kart - Image 1](https://m.media-amazon.com/images/I/61povL4-B0L.jpg) ![125cc Semi-Auto Engine 4 Stroke Motor for ATV Quad Bike Go Kart - Image 2](https://m.media-amazon.com/images/I/51B0hfsbH6L.jpg) ![125cc Semi-Auto Engine 4 Stroke Motor for ATV Quad Bike Go Kart - Image 3](https://m.media-amazon.com/images/I/61iijqxFw1L.jpg) ![125cc Semi-Auto Engine 4 Stroke Motor for ATV Quad Bike Go Kart - Image 4](https://m.media-amazon.com/images/I/61fSXm0zwcL.jpg) ![125cc Semi-Auto Engine 4 Stroke Motor for ATV Quad Bike Go Kart - Image 5](https://m.media-amazon.com/images/I/61xfjByTuuL.jpg) ## Questions & Answers **Q: My dirt bike its a 110cc automatic, would i need anything else to put this engine on it or would it just fit?** A: You should be able to put it on no problem **Q: Will this fit an 86 honda trx 125?** A: yes, it will fit well **Q: does it have a kickstarter** A: This engine with electric start, no need kickstarter **Q: Does this setups require a clutch?** A: HI, no need, it's automatic clutch ## Frequently Bought Together - ZXTDR 125cc Semi-Auto Engine 4 Stroke Motor for ATV Quad Bike Go Kart - Go Kart Clutch 3/4" Bore 10T with #40 41 420 Chain for Go Kart Minibike Yerf-Dog karts with Tecumseh - DYC 428H Motorcycle Chain 122 Links with Chain Breaker, 428 Heavy Duty Chain for 125 150 200cc Motorcycle Mini Bike Dirt Bike Go Kart Compatible with SSR TaoTao Coolster Apollo Baja Kazuma Chinese ATV --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/45252781-125cc-semi-auto-engine-4-stroke-motor-for-atv-quad](https://www.desertcart.pl/products/45252781-125cc-semi-auto-engine-4-stroke-motor-for-atv-quad) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-22*