{"title":"Home page","description":null,"products":[{"product_id":"ezm-pace-setter-gearbox-for-5-8-shaft-49cc-hs-and-honda-gxh50-motorized-bicycle","title":"4 Stroke Bicycle Gearbox – EZM Pacesetter Gearbox for 5\/8 Shaft Honda GXH50 \u0026 Huasheng 142F","description":"\u003ch1 class=\"mb-2 mt-4 break-words text-2xl font-semibold\"\u003eEZM Pacesetter Motorized Bicycle Drive — 4 Stroke Bicycle Gearbox Transmission\u003c\/h1\u003e\n\u003ch2 class=\"mb-2 mt-4 break-words text-xl font-semibold\"\u003eThe Best 4 Stroke Bicycle Gearbox for 49cc Motorized Bicycle Builds\u003c\/h2\u003e\n\u003cdiv class=\"mb-4 break-words font-normal leading-7 text-inherit last:mb-0 [li_\u0026amp;]:mb-0\"\u003eSince 2010, the \u003cstrong class=\"font-semibold\"\u003eEZM Pacesetter Drive\u003c\/strong\u003e has set the standard for motorized bicycle transmissions and the 4-stroke bicycle gearbox category. \u003cstrong class=\"font-semibold\"\u003eDesigned and manufactured right here in the USA\u003c\/strong\u003e, this gearbox delivers the performance, reliability, and durability that serious riders demand — at a price that makes sense.\u003c\/div\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e⚙️ Built for Performance\u003c\/h3\u003e\n\u003cdiv class=\"mb-4 break-words font-normal leading-7 text-inherit last:mb-0 [li_\u0026amp;]:mb-0\"\u003eForget flimsy clutches. The Pacesetter uses a \u003cstrong class=\"font-semibold\"\u003elarger, heavy-duty clutch\u003c\/strong\u003e sourced from the competitive go-kart racing world — the same American-made clutch trusted on the track, now powering your build. The result? Smoother engagement, longer life, and a ride that handles everything from flat roads to steep climbs.\u003c\/div\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong class=\"font-semibold\"\u003e35+ MPH top speed\u003c\/strong\u003e on a standard 26\" rear wheel build\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong class=\"font-semibold\"\u003eStrong low-end torque\u003c\/strong\u003e for tackling hills with ease\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong class=\"font-semibold\"\u003eLightweight yet durable\u003c\/strong\u003e construction — power without the bulk\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e🇺🇸 Made \u0026amp; Supported in the USA\u003c\/h3\u003e\n\u003cdiv class=\"mb-4 break-words font-normal leading-7 text-inherit last:mb-0 [li_\u0026amp;]:mb-0\"\u003eEvery major component — including \u003cstrong class=\"font-semibold\"\u003ereplacement parts and belts\u003c\/strong\u003e — is sourced domestically. That means faster shipping, easy repairs, and no hunting down overseas parts when you need to get back on the road.\u003c\/div\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e🔧 Compatible Engines\u003c\/h3\u003e\n\u003cp class=\"mb-4 break-words text-base font-normal leading-7 last:mb-0 [li_\u0026amp;]:mb-0\"\u003eThe Pacesetter Drive is purpose-built for:\u003c\/p\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong class=\"font-semibold\"\u003eHonda GXH50\u003c\/strong\u003e (5\/8\" straight shaft)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e\n\u003cstrong class=\"font-semibold\"\u003eHuasheng 142F\u003c\/strong\u003e — Chinese clone with 5\/8\" straight shaft\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cblockquote class=\"my-4 border-l-4 border-neutral-400 bg-transparent py-1 pl-6 dark:border-neutral-600\"\u003e\n\u003cdiv class=\"mb-4 break-words font-normal leading-7 text-inherit last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\n\u003cstrong class=\"font-semibold\"\u003eBonus:\u003c\/strong\u003e When paired with a Honda GXH50 engine, this combo can achieve \u003cstrong class=\"font-semibold\"\u003eover 150 MPG\u003c\/strong\u003e — making it one of the most fuel-efficient motorized bike setups available anywhere.\u003c\/div\u003e\n\u003c\/blockquote\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e📐 Fitment \u0026amp; Chain Specs\u003c\/h3\u003e\n\u003cdiv class=\"my-4 w-full overflow-x-auto\"\u003e\n\u003ctable class=\"min-w-full table-auto border-collapse border-spacing-0\" style=\"border-collapse: collapse;\" border=\"1\"\u003e\n\u003cthead class=\"border-b border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003cth class=\"min-w-[100px] whitespace-nowrap px-4 py-2 text-left text-sm font-semibold\"\u003eSpec\u003c\/th\u003e\n\u003cth class=\"min-w-[100px] whitespace-nowrap px-4 py-2 text-left text-sm font-semibold\"\u003eRequirement\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"min-w-[100px] max-w-[600px] px-4 py-3 align-top text-sm\"\u003e\n\u003cdiv class=\"overflow-wrap-anywhere break-words\"\u003eRear Wheel Size\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"min-w-[100px] max-w-[600px] px-4 py-3 align-top text-sm\"\u003e\n\u003cdiv class=\"overflow-wrap-anywhere break-words\"\u003e26\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"min-w-[100px] max-w-[600px] px-4 py-3 align-top text-sm\"\u003e\n\u003cdiv class=\"overflow-wrap-anywhere break-words\"\u003eRear Drive Sprocket\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"min-w-[100px] max-w-[600px] px-4 py-3 align-top text-sm\"\u003e\n\u003cdiv class=\"overflow-wrap-anywhere break-words\"\u003e56–62 tooth\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-neutral-300 dark:border-neutral-800\/90\"\u003e\n\u003ctd class=\"min-w-[100px] max-w-[600px] px-4 py-3 align-top text-sm\"\u003e\n\u003cdiv class=\"overflow-wrap-anywhere break-words\"\u003eChain Pitch\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"min-w-[100px] max-w-[600px] px-4 py-3 align-top text-sm\"\u003e\n\u003cdiv class=\"overflow-wrap-anywhere break-words\"\u003e\n\u003cstrong class=\"font-semibold\"\u003e#41 chain only\u003c\/strong\u003e (#415 chain will NOT work)\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e✅ Why Choose the EZM Pacesetter?\u003c\/h3\u003e\n\u003cul class=\"ml-4 list-outside list-disc\"\u003e\n\u003cli class=\"py-0.5\"\u003e✔️ Established brand since \u003cstrong class=\"font-semibold\"\u003e2010\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e✔️ \u003cstrong class=\"font-semibold\"\u003eUSA designed, made, and supported\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e✔️ Racing-grade go-kart clutch (also USA-made)\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e✔️ Simple belt \u0026amp; part replacement — no specialty tools needed\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e✔️ Parts readily available domestically\u003c\/li\u003e\n\u003cli class=\"py-0.5\"\u003e✔️ \u003cstrong class=\"font-semibold\"\u003e150+ MPG\u003c\/strong\u003e potential with compatible Honda engine\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003cdiv class=\"mb-4 break-words font-normal leading-7 text-inherit last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\u003cem class=\"italic\"\u003eBuild smarter. Ride farther. The EZM Pacesetter Drive — the go-to 4-stroke bicycle gearbox for serious motorized bicycle enthusiasts since 2010.\u003c\/em\u003e\u003c\/div\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003cblockquote class=\"my-4 border-l-4 border-neutral-400 bg-transparent py-1 pl-6 dark:border-neutral-600\"\u003e\n\u003cdiv class=\"mb-4 break-words font-normal leading-7 text-inherit last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\n\u003cstrong class=\"font-semibold\"\u003eNote:\u003c\/strong\u003e This drive is compatible with 5\/8\" straight shaft engines only. Verify shaft size before ordering. #41 chain required — #415 chain is not compatible with this system.\u003c\/div\u003e\n\u003c\/blockquote\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e\n\u003ch3 class=\"mb-1 mt-4 break-words text-lg font-semibold\"\u003e❓ FAQ\u003c\/h3\u003e\n\u003cdiv class=\"mb-4 break-words font-normal leading-7 text-inherit last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\n\u003cstrong class=\"font-semibold\"\u003eWhat is a bicycle gearbox?\u003c\/strong\u003e A bicycle gearbox is a transmission system that transfers power from the engine to the bike’s rear wheel, helping deliver usable speed and torque for motorized bicycle builds.\u003c\/div\u003e\n\u003cdiv class=\"mb-4 break-words font-normal leading-7 text-inherit last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\n\u003cstrong class=\"font-semibold\"\u003eHow much does a bike gearbox cost?\u003c\/strong\u003e Pricing can vary by brand and features. The EZM Pacesetter is positioned as a durable, USA-supported 4-stroke bicycle gearbox built for long-term value.\u003c\/div\u003e\n\u003cdiv class=\"mb-4 break-words font-normal leading-7 text-inherit last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\n\u003cstrong class=\"font-semibold\"\u003eWhat is the best 4-stroke bicycle engine kit?\u003c\/strong\u003e The best setup depends on your bike and riding needs, but the EZM Pacesetter is a strong choice for riders looking for a reliable 4-stroke gearbox transmission with Honda GXH50 compatibility.\u003c\/div\u003e\n\u003cdiv class=\"mb-4 break-words font-normal leading-7 text-inherit last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\n\u003cstrong class=\"font-semibold\"\u003eWhat is the maximum speed of a 49cc 4-stroke bike engine kit?\u003c\/strong\u003e Speed depends on engine size, gearing, wheel size, and rider weight. This Pacesetter system is rated for 35+ MPH on a standard 26\" rear wheel build with compatible setup.\u003c\/div\u003e\n\u003cdiv class=\"mb-4 break-words font-normal leading-7 text-inherit last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\n\u003cstrong class=\"font-semibold\"\u003eWhat engines are compatible with this 4 stroke bicycle gearbox?\u003c\/strong\u003e This gearbox is designed for 5\/8\" straight shaft engines, including the Honda GXH50 and Huasheng 142F.\u003c\/div\u003e\n\u003cdiv class=\"mb-4 break-words font-normal leading-7 text-inherit last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\n\u003cstrong class=\"font-semibold\"\u003eWhat chain does the EZM Pacesetter require?\u003c\/strong\u003e The Pacesetter requires a #41 chain only. #415 chain is not compatible with this system.\u003c\/div\u003e\n\u003cblockquote class=\"my-4 border-l-4 border-neutral-400 bg-transparent py-1 pl-6 dark:border-neutral-600\"\u003e\n\u003cdiv class=\"mb-4 break-words font-normal leading-7 text-inherit last:mb-0 [li_\u0026amp;]:mb-0\"\u003e\n\u003cstrong class=\"font-semibold\"\u003eNote:\u003c\/strong\u003e This drive is compatible with 5\/8\" straight shaft engines only. Verify shaft size before ordering. #41 chain required — #415 chain is not compatible with this system.\u003c\/div\u003e\n\u003c\/blockquote\u003e\n\u003chr class=\"my-7 border-neutral-300 dark:border-neutral-700\"\u003e","brand":"Ezmotorbikes","offers":[{"title":"Default Title","offer_id":62848160366961,"sku":null,"price":369.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0978\/6235\/3265\/files\/media-1787847829195.png?v=1787867690"},{"product_id":"ezm-pace-setter-gearbox-and-hs-49cc-bicycle-motor","title":"EZM Pacesetter Motorized Bicycle Gearbox and HS 49cc Motorized Bicycle Gearbox","description":"\u003ch1\u003eEZM Pacesetter Motorized Bicycle Gearbox and HS 49cc Bicycle Motor\u003c\/h1\u003e\n\u003cp\u003eThe EZM Pacesetter motorized bicycle gearbox is built for 49cc 4-stroke bicycle motor setups and offers a durable belt drive transmission for dependable performance. Made in the USA, this motorized bicycle gearbox is designed for riders and builders looking for a strong-torque drive solution for custom motorized bicycle projects.\u003c\/p\u003e\n\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThis 49cc gearbox is compatible with Honda GXH50 and Huasheng 142F applications, making it a practical choice for motorized bicycle drive builds and manufacturer integration. Its belt drive design supports smooth power transfer in a compact bicycle motor setup.\u003c\/p\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow do you turn a regular bike into a motorized bike?\u003c\/strong\u003e\u003cbr\u003eBy installing a compatible motorized bicycle gearbox and drivetrain system with the proper motor, mounting components, and controls for your build.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is an automatic gearbox bicycle?\u003c\/strong\u003e\u003cbr\u003eAn automatic gearbox bicycle uses a drivetrain system that manages power transfer for easier operation, depending on the motor and transmission setup.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do motor bicycle gears work?\u003c\/strong\u003e\u003cbr\u003eElectric bicycle gears use the drivetrain to help match motor output to riding conditions. This product is a belt drive gearbox for 4-stroke motorized bicycle builds, not an electric bike transmission.\u003c\/p\u003e","brand":"Ezmotorbikes","offers":[{"title":"Default Title","offer_id":64469672427889,"sku":null,"price":649.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0978\/6235\/3265\/files\/media-1787849477322.png?v=1787868144"}],"url":"https:\/\/ezmotorbikes.com\/collections\/frontpage.oembed","provider":"EZmotorbikes","version":"1.0","type":"link"}