{"product_id":"dr-pulley-sliders-21x17-vespa-gts-gtv-gt300-1200-1113","title":"Dr. Pulley 21x17 Sliding Roller Weights: Vespa \u0026 Piaggio","description":"\u003ch2\u003eUnleash Your Engine: Dr. Pulley 21x17 Sliders\u003c\/h2\u003e\u003cp\u003eTransform your scooter's power delivery with \u003cstrong\u003eDr. Pulley Sliding Roller Weights\u003c\/strong\u003e. Unlike standard round rollers that can develop flat spots and limit your gear range, Dr. Pulley’s patented sliding shape allows the variator to open more fully. This results in a higher top speed and faster off-the-line acceleration by allowing the belt to sit lower in the \"low gear\" position and higher in the \"high gear\" position than traditional rollers allow.\u003c\/p\u003e\u003ch3\u003eTechnical Performance Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Anti-Flat Spot Design:\u003c\/strong\u003e The non-round geometry eliminates the uneven wear and \"notching\" common with circular weights, ensuring consistent shifting over thousands of miles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroader Gear Ratio:\u003c\/strong\u003e Allows the variator to retract and extend further than OEM specs, providing a \"best of both worlds\" upgrade for both takeoff and cruising.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelf-Lubricating SL9 Material:\u003c\/strong\u003e Composed of a high-tech, low-friction nylon composite that resists heat buildup and reduces internal variator wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Tuning:\u003c\/strong\u003e Available in weights from 9g to 13g to perfectly match your specific modifications, whether you're looking for better hill climbing or maximum top speed.\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch3\u003eComprehensive Fitment Guide\u003c\/h3\u003e\u003cp\u003eThese 21x17mm weights are a direct performance upgrade for \u003cstrong\u003eVespa and Piaggio 250cc–300cc\u003c\/strong\u003e models:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eBrand \/ Model\u003c\/th\u003e\n\u003cth style=\"text-align: left;\"\u003eEngine Family\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVespa GTS 250 \/ 300\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eQuasar, HPE, \u0026amp; Super Sport\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVespa GTV 250 \/ 300\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSei Giorni \u0026amp; Heritage Models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePiaggio BV 250 \/ 300 \/ 350\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBeverly \/ MP3 250 \u0026amp; 300\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAprilia Scarabeo \/ Atlantic\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e200, 250, \u0026amp; 300cc Variants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRoyal Alloy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGP300S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003chr\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 21mm (Diameter) x 17mm (Width)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e Set of 6 Sliders\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertification:\u003c\/strong\u003e ISO 9001 Certified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Dr. Pulley (Taiwan)\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003cblockquote\u003e\n\u003cstrong\u003eMechanic's Note:\u003c\/strong\u003e The 21x17mm size is the standard for the larger Piaggio engine blocks. \u003cstrong\u003eInstallation Warning:\u003c\/strong\u003e Dr. Pulley weights are directional. Ensure the side with the \"closed\" face is pointing toward the direction of the variator's rotation to avoid damage. \u003cstrong\u003eTuning Tip:\u003c\/strong\u003e For the best results, select a weight that is 10–15% lighter than your stock rollers to achieve better acceleration without sacrificing top speed.\u003c\/blockquote\u003e\u003cp style=\"font-size: 0.85em; color: #666;\"\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e SR2117\u003cbr\u003e\u003cstrong\u003eVendor:\u003c\/strong\u003e Dr. Pulley\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003chr\u003e\u003ch3\u003eEngine Compatibility: Leader vs. Quasar\u003c\/h3\u003e\u003cp\u003eThe 21x17mm size is the standard specification for Piaggio's high-displacement engine families:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiaggio LEADER (200cc):\u003c\/strong\u003e Found in the Vespa GT 200 and Piaggio BV 200. While smaller 125\/150cc Leader engines often use 19x17mm, this 21x17mm size is the standard for the 200cc variant.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiaggio QUASAR (250cc - 300cc):\u003c\/strong\u003e This is the default roller size for the 244cc and 278cc engines used in the Vespa GTS 250 and GTS 300. Using Dr. Pulley Sliders in Quasar engines is the most effective way to reduce \"belt slap\" and improve highway cruising smoothness.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDetailed Model Fitment\u003c\/h3\u003e\u003cp\u003eThese 21x17mm weights are a precision fit for the following scooters:\u003c\/p\u003e\u003ctable style=\"width: 100%; height: 117.563px;\"\u003e\n\u003cthead\u003e\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 8.92579%; height: 19.5938px;\"\u003eBrand\u003c\/th\u003e\n\u003cth style=\"width: 88.2171%; height: 19.5938px;\"\u003eCompatible Models\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbod\u003e\u003c\/tbod\u003e\n\u003c\/table\u003e","brand":"Dr. Pulley","offers":[{"title":"9G","offer_id":46759059521816,"sku":"1200-1113 9G","price":40.0,"currency_code":"USD","in_stock":true},{"title":"9.5 G","offer_id":46759059554584,"sku":"1200-1113 9.5 G","price":40.0,"currency_code":"USD","in_stock":true},{"title":"10 G","offer_id":46759059587352,"sku":"1200-1113 10 G","price":40.0,"currency_code":"USD","in_stock":true},{"title":"10.5 G","offer_id":46759059620120,"sku":"1200-1113 10.5 G","price":40.0,"currency_code":"USD","in_stock":false},{"title":"11 G","offer_id":46759059489048,"sku":"1200-1113 11 G","price":40.0,"currency_code":"USD","in_stock":true},{"title":"11.5 G","offer_id":46759059652888,"sku":"1200-1113 11.5 G","price":40.0,"currency_code":"USD","in_stock":true},{"title":"12 G","offer_id":46759059685656,"sku":"1200-1113 12 G","price":40.0,"currency_code":"USD","in_stock":true},{"title":"12.5","offer_id":46759059718424,"sku":"1200-1113 12.5","price":40.0,"currency_code":"USD","in_stock":true},{"title":"13 G","offer_id":46759059751192,"sku":"1200-1113 13 G","price":40.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/1728\/1816\/products\/1200-1113_35bac58b-0689-4cf1-8322-3f691f9e51a2.jpg?v=1695298767","url":"https:\/\/www.scooterworks.com\/products\/dr-pulley-sliders-21x17-vespa-gts-gtv-gt300-1200-1113","provider":"Scooterworks USA, LLC","version":"1.0","type":"link"}