{"product_id":"yoshimura-stainless-full-exhaust-for-honda-monkey-121300u500","title":"Yoshimura Stainless Full Exhaust for Honda Monkey – 121300U500","description":"\u003cdiv class=\"trd trd--yoshimura\"\u003e\n\u003csection class=\"trd-hero\"\u003e\u003cp class=\"trd-eyebrow\"\u003eYoshimura · Full System\u003c\/p\u003e\n\u003ch2 class=\"trd-headline\"\u003eGP-MAGNUM Full Exhaust for Honda Monkey\u003c\/h2\u003e\n\u003cp class=\"trd-lead\"\u003eThe Yoshimura GP-MAGNUM Stainless Full System is a Race Series Exhaust System built to match the Honda Monkey’s classic look while delivering the distinct GP-Magnum style. Designed for builders and racers who want a retro Yoshimura JDM-inspired appearance, this full exhaust system uses stainless construction throughout and features an old school Yoshimura badge.\u003c\/p\u003e\n\u003cp class=\"trd-lead\"\u003eBuilt specifically for Honda Monkey 2019–2026 (see fitment table below), this U.S.-marked configuration is tailored for the U.S. market. Yoshimura lists the GP-MAGNUM Stainless Full System weight at 5.3 Lbs. versus the stock full system weight of 11.2 Lbs.\u003c\/p\u003e\n\u003cul class=\"trd-chips\"\u003e\n\u003cli class=\"trd-chip\"\u003e\n\u003cspan class=\"trd-chip-label\"\u003ePart Number\u003c\/span\u003e\u003cspan class=\"trd-chip-value\"\u003e121300U500\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"trd-chip\"\u003e\n\u003cspan class=\"trd-chip-label\"\u003eMaterial\u003c\/span\u003e\u003cspan class=\"trd-chip-value\"\u003eStainless\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"trd-chip\"\u003e\n\u003cspan class=\"trd-chip-label\"\u003eFits\u003c\/span\u003e\u003cspan class=\"trd-chip-value\"\u003eHonda Monkey\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\u003cdiv class=\"trd-cards trd-cards--3\"\u003e\n\u003carticle class=\"trd-card\"\u003e\u003cdiv class=\"trd-card-body\"\u003e\n\u003ch3 class=\"trd-card-title\"\u003eStainless full system\u003c\/h3\u003e\n\u003cp class=\"trd-card-text\"\u003eThis GP-MAGNUM is a complete Full System in Yoshimura’s Race Series Exhaust System line. The manufacturer states stainless steel construction is used throughout the system, pairing classic mini-bike proportions with the recognizable GP-Magnum shape and an old school Yoshimura badge.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/article\u003e\u003carticle class=\"trd-card\"\u003e\u003cdiv class=\"trd-card-body\"\u003e\n\u003ch3 class=\"trd-card-title\"\u003eU.S.-spec configuration\u003c\/h3\u003e\n\u003cp class=\"trd-card-text\"\u003eYoshimura explains this exhaust was designed specifically for U.S. spec. bikes and is made and marked for the U.S. market. Yoshimura R\u0026amp;D is identified as the only authorized distributor in North America for Yoshimura Japan (YJP) and Yoshimura Asia (YAT).\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/article\u003e\u003carticle class=\"trd-card\"\u003e\u003cdiv class=\"trd-card-body\"\u003e\n\u003ch3 class=\"trd-card-title\"\u003eDocumented weight figures\u003c\/h3\u003e\n\u003cp class=\"trd-card-text\"\u003eYoshimura provides clear weight numbers for comparison: GP-MAGNUM Stainless Full System weight is listed at 5.3 Lbs., while the stock full system weight is listed at 11.2 Lbs. These stated figures help riders understand the change in system weight.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/article\u003e\n\u003c\/div\u003e\n\u003csection class=\"trd-story\"\u003e\u003cfigure class=\"trd-story-media\"\u003e\u003cimg class=\"trd-story-img\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/4884\/6743\/files\/yoshimura-121300u500-stainless-exhaust-view.jpg?v=1792268412\u0026amp;width=1400\" alt=\"Yoshimura Stainless Full Exhaust for Honda Monkey – 121300U500 – Classic GP-Magnum styling\" width=\"1400\" height=\"1050\" loading=\"lazy\"\u003e\u003c\/figure\u003e\u003cdiv class=\"trd-story-copy\"\u003e\n\u003ch3 class=\"trd-story-title\"\u003eClassic GP-Magnum styling\u003c\/h3\u003e\n\u003cp class=\"trd-story-text\"\u003eYoshimura positions the GP-Magnum as a natural match for the Monkey’s late 60’s early 70’s retro styling. The look is aimed at builders and racers who want that classic Yoshimura JDM style on a compact platform, finished off with an old school Yoshimura badge for a period-correct touch.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"trd-story trd-story--reverse\"\u003e\u003cfigure class=\"trd-story-media\"\u003e\u003cimg class=\"trd-story-img\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/4884\/6743\/files\/yoshimura-121300u500-stainless-exhaust-view-2.jpg?v=1792268555\u0026amp;width=1400\" alt=\"Yoshimura Stainless Full Exhaust for Honda Monkey – 121300U500 – Construction and variants\" width=\"1400\" height=\"934\" loading=\"lazy\"\u003e\u003c\/figure\u003e\u003cdiv class=\"trd-story-copy\"\u003e\n\u003cp class=\"trd-label\"\u003eEngineering\u003c\/p\u003e\n\u003ch3 class=\"trd-story-title\"\u003eConstruction and variants\u003c\/h3\u003e\n\u003cp class=\"trd-story-text\"\u003eAccording to Yoshimura, two GP-Magnum mini systems are available and both are handcrafted by a sister company in Asia for Yoshimura R\u0026amp;D exclusively for the U.S. market. The manufacturer states the system uses stainless steel construction throughout, with two sleeve options: a stainless polish finish or a titanium sleeve that displays a bluing effect.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"trd-story\"\u003e\u003cfigure class=\"trd-story-media\"\u003e\u003cimg class=\"trd-story-img\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/4884\/6743\/files\/yoshimura-121300u500-stainless-exhaust-view-3.jpg?v=1792268555\u0026amp;width=1400\" alt=\"Yoshimura Stainless Full Exhaust for Honda Monkey – 121300U500 – Fitment and important notes\" width=\"1400\" height=\"933\" loading=\"lazy\"\u003e\u003c\/figure\u003e\u003cdiv class=\"trd-story-copy\"\u003e\n\u003cp class=\"trd-label\"\u003eFitment\u003c\/p\u003e\n\u003ch3 class=\"trd-story-title\"\u003eFitment and important notes\u003c\/h3\u003e\n\u003cp class=\"trd-story-text\"\u003eThis exhaust system is listed for Honda Monkey 2019–2026. Media on the page includes a dyno chart, a product video, and an installation PDF to support setup and expectations. Yoshimura also notes a right side cover is available but sold separately.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"trd-section trd-section--performance\"\u003e\u003ch2 class=\"trd-section-title\"\u003ePerformance\u003c\/h2\u003e\n\u003cfigure class=\"trd-figure\"\u003e\u003cimg class=\"trd-figure-img\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/4884\/6743\/files\/yoshimura-121300u500-monkey-dyno-chart.png?v=1792268555\u0026amp;width=1600\" alt=\"Yoshimura Stainless Full Exhaust for Honda Monkey – 121300U500 – Yoshimura dyno chart\" width=\"646\" height=\"734\" loading=\"lazy\"\u003e\u003cfigcaption class=\"trd-caption\"\u003eYoshimura dyno chart for this system.\u003c\/figcaption\u003e\u003c\/figure\u003e\u003c\/section\u003e\u003csection class=\"trd-section trd-section--video\"\u003e\u003ch2 class=\"trd-section-title\"\u003eProduct Video\u003c\/h2\u003e\n\u003cdiv class=\"trd-video\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/SWJ_VGtrQcc\" title=\"Yoshimura Stainless Full Exhaust for Honda Monkey – 121300U500 video\" loading=\"lazy\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv class=\"trd-video\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/24JDe3A0UgA\" title=\"Yoshimura Stainless Full Exhaust for Honda Monkey – 121300U500 video\" loading=\"lazy\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"trd-section trd-section--specs\"\u003e\u003ch2 class=\"trd-section-title\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv class=\"trd-table-wrap\"\u003e\u003ctable class=\"trd-table trd-table--specs\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePart Number\u003c\/th\u003e\n\u003ctd\u003e121300U500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eYoshimura\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eProduct Line\u003c\/th\u003e\n\u003ctd\u003eRace Series Exhaust System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eSystem Type\u003c\/th\u003e\n\u003ctd\u003eFull System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eStainless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eShipping Weight\u003c\/th\u003e\n\u003ctd\u003e10 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBarcode\u003c\/th\u003e\n\u003ctd\u003e00840025909984\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eEmissions Compliance\u003c\/th\u003e\n\u003ctd\u003eQUALIFIED MANUFACTURER DECLARED \"MODIFIED PART\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"trd-section trd-section--fitment\"\u003e\u003ch2 class=\"trd-section-title\"\u003eFitment\u003c\/h2\u003e\n\u003cdiv class=\"trd-table-wrap\"\u003e\u003ctable class=\"trd-table\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eMake\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eModel\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eModel Years\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eMonkey\u003c\/td\u003e\n\u003ctd\u003e2019–2026\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"trd-caption\"\u003eFitment as listed by Yoshimura for part number 121300U500.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"trd-section trd-section--docs\"\u003e\u003ch2 class=\"trd-section-title\"\u003eInstallation \u0026amp; Documents\u003c\/h2\u003e\n\u003cp class=\"trd-docs\"\u003e\u003ca class=\"trd-button\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/4884\/6743\/files\/yoshimura-121300u500-installation-manual.pdf?v=1792266582\" target=\"_blank\" rel=\"noopener\"\u003eInstallation Instructions (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"trd-caption\"\u003eProvided by Yoshimura. Opens in a new tab.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"Yoshimura","offers":[{"title":"Default Title","offer_id":68079619178647,"sku":"121300U500","price":519.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0585\/4884\/6743\/files\/yoshimura-121300u500-stainless-exhaust-main.jpg?v=1792268555","url":"https:\/\/allamericanktm.com\/products\/yoshimura-stainless-full-exhaust-for-honda-monkey-121300u500","provider":"All American KTM","version":"1.0","type":"link"}