{"product_id":"trailmaster-mk125es-pro-series-dirt-bike-bosch-efi-4-speed-electric-start-dual-disc-brakes","title":"TrailMaster MK125ES Pro Series Dirt Bike - Bosch EFI, 4-Speed, Electric Start, Dual Disc Brakes","description":"\u003ch1\u003eTrailMaster MK125ES Pro Series Dirt Bike - Bosch EFI, 4-Speed, Electric Start, Dual Disc Brakes\u003c\/h1\u003e\n\u003chr\u003e\n\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003eThe TrailMaster MK125ES Pro Series is a premium 125cc mid-size dirt bike built for riders ages 12 and up who are ready to take their off-road game to the next level. Powered by a 4-stroke, air-cooled, fuel-injected engine with a genuine Bosch EFI system, this bike delivers smooth, consistent power across every gear without the hassle of a carb. A 4-speed manual transmission (N-1-2-3-4 - no circular shifting) gives you real control, while electric start with kick backup means you're never stranded on the trail.\u003c\/p\u003e\n\u003cp\u003eDesigned with motocross ergonomics and a race-ready suspension setup, the MK125ES handles everything from hardpack to rough terrain with confidence. Inverted 43\/45mm front shocks, a nitrogen air gas rear mono shock, and dual disc brakes front and rear give you the stopping power and ride quality of bikes costing far more. At just 149 lbs and a 29.5\" seat height, this is a serious machine that smaller and intermediate riders can actually manage.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBosch EFI Fuel Injection:\u003c\/strong\u003e Genuine Bosch electronic fuel injection for reliable, consistent starts and smooth power delivery in all conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e125cc Air-Cooled 4-Stroke Engine:\u003c\/strong\u003e Single-cylinder, 4-stroke motor with 123.67cc displacement - proven, low-maintenance, and trail-ready.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectric Start with Kick Backup:\u003c\/strong\u003e Push-button electric start keeps things simple; kick start backup ensures you're never stuck in the field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-Speed Manual Transmission (N-1-2-3-4):\u003c\/strong\u003e True sequential shifting - not circular - so you always know what gear you're in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverted Front Forks (43\/45mm):\u003c\/strong\u003e Race-spec inverted front shock absorbers deliver superior steering precision and bump absorption over rough terrain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNitrogen Air Gas Rear Shock:\u003c\/strong\u003e Rear mono shock absorber provides a planted, controlled ride on variable terrain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Disc Brakes:\u003c\/strong\u003e Front and rear disc brakes give confident, responsive stopping power in all riding conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow 29.5\" Seat Height:\u003c\/strong\u003e Approachable seat height designed for younger and smaller-stature intermediate riders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance Stainless Steel Muffler:\u003c\/strong\u003e Durable exhaust with a performance-tuned tone and long-lasting corrosion resistance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlloy Wheels, Hubs \u0026amp; Foldable Levers:\u003c\/strong\u003e Lightweight alloy construction throughout with foldable handle levers that survive tip-overs on the trail.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWaterproof Wire Harness:\u003c\/strong\u003e Fully sealed electrical system built to handle mud, rain, and stream crossings without issue.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e14\/12 Wheel Configuration:\u003c\/strong\u003e 14\" front \/ 12\" rear YUANXING tires sized and balanced for youth-to-intermediate off-road riding.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eShipping\u003c\/h2\u003e\n\u003cp\u003eThis product requires additional shipping. If you'd like a quote before you purchase, fill out the form on this page or email us at service@omahasportsandgames.com for a delivery ETA or to confirm shipping details.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTrailMaster MK125ES Pro Series Dirt Bike (color of choice)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy You'll Love It\u003c\/h2\u003e\n\u003cp\u003eThe MK125ES Pro Series is where serious off-road riding begins. TrailMaster has built a reputation for delivering bikes that punch well above their price point, and this model is a standout example - with genuine Bosch EFI, race-spec inverted forks, and a dual disc brake setup you won't find on most bikes in this class. The newly designed frame is purpose-built for motocross ergonomics, meaning hours in the saddle stay comfortable and in control. Parents and riders alike will appreciate the confidence that comes from a bike with no circular shifting, a proper sequential gearbox, and a waterproof electrical harness that holds up to real-world abuse. Whether you're hitting trails on the weekend or working toward your first race, the MK125ES is a machine you can grow with and trust.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003cdiv class=\"custom-product-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eView Product Specs\u003c\/strong\u003e\u003c\/summary\u003e\n\u003ctable border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eEngine Type\u003c\/th\u003e\n\u003ctd\u003eSingle cylinder, 4-stroke, air-cooled\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDisplacement\u003c\/th\u003e\n\u003ctd\u003e123.67 cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax Power\u003c\/th\u003e\n\u003ctd\u003e6.3 kW \/ 7500 RPM (±1.5%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax Torque\u003c\/th\u003e\n\u003ctd\u003e8.8 N·m \/ 5500 RPM (±1.5%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompression Ratio\u003c\/th\u003e\n\u003ctd\u003e9.0:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTransmission\u003c\/th\u003e\n\u003ctd\u003e4-Speed Manual (N-1-2-3-4), Chain Drive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStart Type\u003c\/th\u003e\n\u003ctd\u003eElectric Start \/ Kick Start Backup\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIgnition\u003c\/th\u003e\n\u003ctd\u003eBosch EFI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMin. Fuel Consumption\u003c\/th\u003e\n\u003ctd\u003e367 g\/kW·h\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMinimum Turning Radius\u003c\/th\u003e\n\u003ctd\u003e1900 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLubricant\u003c\/th\u003e\n\u003ctd\u003eSF 15W\/40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOverall Size (L x W x H)\u003c\/th\u003e\n\u003ctd\u003e1620 x 700 x 1100 mm \/ 63.82 x 27.58 x 42.9 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWheelbase\u003c\/th\u003e\n\u003ctd\u003e1150 mm \/ 45.31 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSeat Height\u003c\/th\u003e\n\u003ctd\u003e750 mm \/ 29.55 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGround Clearance\u003c\/th\u003e\n\u003ctd\u003e260 mm \/ 10.24 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFuel Capacity\u003c\/th\u003e\n\u003ctd\u003e3.5 L \/ 0.92 gal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWheels\u003c\/th\u003e\n\u003ctd\u003eSteel Rims, High Quality Alloy Hubs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTires\u003c\/th\u003e\n\u003ctd\u003eYUANXING - Front: 60\/100-14 \/ Rear: 80\/100-12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFrame\u003c\/th\u003e\n\u003ctd\u003eHigh Quality Steel Frame\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFront Fork\u003c\/th\u003e\n\u003ctd\u003eInverted Front Shock Absorbers 43\/45mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRear Shock\u003c\/th\u003e\n\u003ctd\u003eNon-adjustable Mono Shock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConnecting Board\u003c\/th\u003e\n\u003ctd\u003eAlloy (Upper and Lower)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHandle Lever\u003c\/th\u003e\n\u003ctd\u003eFoldable Alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFront Brake\u003c\/th\u003e\n\u003ctd\u003eDisc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRear Brake\u003c\/th\u003e\n\u003ctd\u003eDisc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eExhaust\u003c\/th\u003e\n\u003ctd\u003eStainless Steel Muffler\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNet Weight\u003c\/th\u003e\n\u003ctd\u003e68 kg \/ 149.6 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGross Weight\u003c\/th\u003e\n\u003ctd\u003e97 kg \/ 213.4 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePacking Size\u003c\/th\u003e\n\u003ctd\u003e1420 x 440 x 860 mm \/ 55.95 x 17.34 x 33.88 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cdiv class=\"custom-product-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat age and size rider is the MK125ES designed for?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eThe MK125ES Pro Series is recommended for riders ages 12 and up. The 29.5\" seat height and 149 lb weight make it manageable for younger and smaller-stature intermediate riders, while the 125cc engine and 4-speed gearbox give experienced teen and adult riders plenty to work with.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does Bosch EFI mean and why does it matter?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eEFI stands for Electronic Fuel Injection. The Bosch EFI system automatically meters fuel delivery based on engine conditions, which means easier cold starts, more consistent throttle response, and better fuel efficiency compared to a traditional carburetor. You won't need to mess with jetting or choke settings - just start and ride.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is circular shifting and does this bike have it?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eCircular shifting is a transmission setup where shifting up past 4th gear cycles the bike back to neutral and then 1st gear - which can be disorienting and even dangerous on the trail. The MK125ES uses a true sequential gearbox (N-1-2-3-4) that stops at 4th. TrailMaster specifically calls this out because many competitors at this price point use circular shift setups.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes the bike ship assembled or do I need to put it together?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eThe MK125ES ships partially assembled and packaged on a pallet. Final assembly is required - typically involving mounting handlebars, front wheel, mirrors, and a few other components. Most riders can complete assembly in 1-2 hours with basic hand tools. A setup manual is included.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this bike street legal?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eNo. The TrailMaster MK125ES is an off-road dirt bike and is not street legal. It is designed and intended for off-road use only on private property, trails, and designated riding areas.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat colors are available?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eThe MK125ES Pro Series is available in Red, Blue, and Green. Select your preferred color at the time of purchase.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e","brand":"TrailMaster Powersports","offers":[{"title":"Red","offer_id":55951839953201,"sku":"TrailMaster MK125ES Pro Series Dirt Bike","price":1599.0,"currency_code":"USD","in_stock":true},{"title":"Blue","offer_id":55951839985969,"sku":"TrailMaster MK125ES Pro Series Dirt Bike","price":1599.0,"currency_code":"USD","in_stock":true},{"title":"Green","offer_id":55951840018737,"sku":"TrailMaster MK125ES Pro Series Dirt Bike","price":1599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1724\/7681\/files\/12_Ages_12_and_up_-_GoKarts_USA_-1809853_b6857e04-3a18-42bf-a4f9-305996eae322.jpg?v=1787763209","url":"https:\/\/omahasportsandgames.com\/products\/trailmaster-mk125es-pro-series-dirt-bike-bosch-efi-4-speed-electric-start-dual-disc-brakes","provider":"Omaha Sports \u0026 Games","version":"1.0","type":"link"}