{"product_id":"gymmeds-30-series-torque-converter-for-go-kart-mini-bike-1-bore-belt-sprockets-2-8-hp-upgrade","title":"GYMMEDS 30 Series Torque Converter for Go-Kart \u0026 Mini Bike — 1\" Bore, Belt \u0026 Sprockets, 2–8 HP Upgrade","description":"\u003cp\u003e\u003cstrong\u003eGYMMEDS 30 Series torque converter is a bolt-on clutch kit designed for 1\" straight crankshafts that upgrades small engines to a smoother, more efficient variable-drive system.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis complete torque converter kit replaces many common centrifugal clutches and specific OEM units (including Manco\/Comet part numbers referenced) to give go karts, mini bikes, small tractors and other light-duty vehicles reliable, progressive power transfer. Built from iron and aluminum components, the set ships with driver and driven pulleys, sprockets for #40\/#41\/420 and #35 chains, a drive belt, mounting plate, cover and full hardware to simplify installation on compatible engines.\u003c\/p\u003e\n\n\u003ch3\u003eWill this torque converter fit my engine?\u003c\/h3\u003e\n\u003cp\u003eThe GYMMEDS unit fits engines with a 1\" straight crankshaft bore and a matching flat key. It is intended for small engines from about 2 HP up to 8 HP, with best results most commonly on 6–6.5 HP setups. Confirm your crankshaft diameter and key orientation before ordering — it does not work with 3\/4\" bores.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDriver clutch bore: 1\" (with flat key)\u003c\/li\u003e\n  \u003cli\u003eSuitable engine range: 2 HP–8 HP (optimal 6–6.5 HP)\u003c\/li\u003e\n  \u003cli\u003eNot compatible with 3\/4\" crankshaft bores\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this torque converter change performance on a go kart or mini bike?\u003c\/h3\u003e\n\u003cp\u003eInstead of a single-speed centrifugal clutch, the torque converter provides variable gear ratios through centrifugal drive and driven pulley action, letting the engine stay in a more efficient RPM band during acceleration and load changes. That translates to gentler launches, reduced engine strain, and a broader usable speed range without manual shifting. It’s especially useful where load varies, like towing or uneven terrain.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEngagement range: approximately 2350 ± 200 RPM\u003c\/li\u003e\n  \u003cli\u003eDriven unit overall diameter: 6\" with a 5\/8\" driven pulley bore\u003c\/li\u003e\n  \u003cli\u003eReduces stress on the engine and existing centrifugal clutches\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat’s included and what additional parts might I need?\u003c\/h3\u003e\n\u003cp\u003eThe kit includes the main drive and driven pulleys, a drive belt, both 10-tooth (#40\/#41\/420) and 12-tooth (#35) sprockets, an aluminum mounting plate, a plastic cover, and a full set of mounting hardware—everything required for a straightforward swap on compatible machines. Chains are not included, so you’ll need the correct chain for your sprocket choice, and you should have basic hand tools and a torque wrench for proper installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncluded: 1\" driver pulley, 5\/8\" driven pulley, belt, 10T and 12T sprockets\u003c\/li\u003e\n  \u003cli\u003eIncluded: aluminum mounting plate, plastic cover, full mounting hardware\u003c\/li\u003e\n  \u003cli\u003eNot included: drive chain; basic installation tools recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs the build quality suitable for regular outdoor use?\u003c\/h3\u003e\n\u003cp\u003eGYMMEDS manufactures the clutch components from iron and aluminum alloys to balance durability and weight. The materials and design are intended for light vehicle duty—recreational go karts, mini bikes, riding mowers and similar applications—where riders expect reliable, long-term operation when mounted and maintained correctly. Proper alignment, belt tensioning, and periodic inspection will extend service life.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eConstruction: iron and aluminum parts for durability and lower weight\u003c\/li\u003e\n  \u003cli\u003eDesigned for recreational and light commercial use\u003c\/li\u003e\n  \u003cli\u003eMaintenance: check alignment and belt\/sprocket wear regularly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The GYMMEDS 30 Series torque converter is intended for DIY mechanics, small-vehicle hobbyists and light-equipment owners who want to replace a worn centrifugal clutch or add a variable drive to a 1\" crankshaft engine (2–8 HP range). It’s a good choice if you run go karts, Coleman-style mini bikes, small ATVs, riding mowers or utility machines and you need smoother acceleration, reduced clutch wear, and a robust bolt-on solution that includes the mounting hardware and sprocket options.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this torque converter fit a 3\/4\" crankshaft?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. This GYMMEDS torque converter requires a 1\" straight crankshaft bore with a flat key and is not compatible with 3\/4\" shafts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are chains included for the sprockets?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No, chains are not included. The kit includes 10T (#40\/#41\/420) and 12T (#35) sprockets but you must supply the correct chain separately.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"GYMMEDS","offers":[{"title":"Default Title","offer_id":48079885107358,"sku":"B0D6Z81FF5","price":99.32,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/gymmeds-front-assembly.jpg?v=1785774355","url":"https:\/\/northtrailauto.ca\/products\/gymmeds-30-series-torque-converter-for-go-kart-mini-bike-1-bore-belt-sprockets-2-8-hp-upgrade","provider":"North Trail Auto","version":"1.0","type":"link"}