{"product_id":"speed-kit-gx340-to-gx390-420-predator-13-15hp-ohv-stage-2","title":"Speed Kit; GX340 to GX390, 420 Predator, \u0026 13\/15hp OHV; Stage 2","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e\u003ca style=\"background-color: #ffff00;\" title=\"Speed Kit Selection Guide\" href=\"https:\/\/gokartsusa.biz\/pages\/speed-kit-selection-guide\"\u003eSpeed Kit Selection Guide\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eStage 2 Speed Kit for GX340-GX390, 420 Predator, and 13\/15hp (440-460cc) OHV Engines\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e\u003cbr\u003e\u003c\/b\u003e\u003cspan\u003eAs a step up from the \u003c\/span\u003e\u003ca href=\"https:\/\/gokartsusa.biz\/products\/stage-1-speed-kit-for-gx340-gx390-420-predator-and-1315hp-ohv\"\u003e\u003cb\u003eStage 1\u003c\/b\u003e\u003c\/a\u003e\u003cspan\u003e, this kit is designed to improve the power and durability of GX340s and GX390s.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eIncludes:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRace\/Open Air Filter \u0026amp; Adapter\u003c\/li\u003e\n\u003cli\u003e23.5mm (Bored) Honda Race Carb\u003c\/li\u003e\n\u003cli\u003eHeavy Duty Valve Springs\u003c\/li\u003e\n\u003cli\u003eOffset Timing Key\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eTwister Camshaft\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003eCarb and Side Cover (7-Bolt) Gaskets\u003c\/li\u003e\n\u003cli\u003eAdditional main jet for optional tuning\u003c\/li\u003e\n\u003cli\u003e\u003ci\u003eOptional \u003ca href=\"https:\/\/gokartsusa.biz\/collections\/gokart-minibike-racing-exhaust\"\u003eHeader\/Exhaust\u003c\/a\u003e\u003c\/i\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ci\u003eOptional Aluminum Flywheel\u003c\/i\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003cb\u003e*Note:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003eUse of the choke bracket requires use of a stock Honda (or Chines OHV) \"Air Filter-to-Carb\" gasket. This is not included in the kit. You can use the one that came with the motor.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eUT2 series Hondas (2012 \u0026amp; up) or later have a built-in rev limiter in the coil and will require a new coil to exceed 4000rpm. The UT2 coils (4 wire) can only be used with stock flywheels, and 6693 Billet flywheel.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003eIf using another billet flywheel, you must run a UT1 style coil (single wire).\u003cbr\u003e\u003cbr\u003e\u003cspan\u003e13\/15 Chinese Engines (414, 420, 460) usually have UT1 style coils already. However, some Lifans and 420s have a digital ignition and will need a Honda UT1 coil to run the billet flywheel.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cbr\u003eHeader sold separately.\u003cbr\u003e\u003cbr\u003eFilter should be sprayed with a K\u0026amp;N type oil, especially for dirt applications. Oil not included \u003cbr\u003e\u003cbr\u003ePicture is for reference only and may show optional parts. See above description for actual content.\u003cbr\u003e\u003ci\u003e\u003cspan\u003e\u003cbr\u003eWarning: Billet aluminum flywheel recommended. Stock flywheels, especially \"clones\" are prone to failure and are very dangerous!\u003c\/span\u003e\u003c\/i\u003e\n\u003c\/div\u003e","brand":"GoKarts USA®","offers":[{"title":"No Flywheel \/ No Coil","offer_id":43110533759035,"sku":"NR-STAGE2KIT390","price":192.0,"currency_code":"USD","in_stock":true},{"title":"No Flywheel \/ Add UT2 Coil without Rev Limiter for UT2 Honda","offer_id":43110533791803,"sku":"NR-STAGE2KIT390","price":262.0,"currency_code":"USD","in_stock":true},{"title":"No Flywheel \/ Add Genuine Honda UT1 Coil","offer_id":43110533824571,"sku":"NR-STAGE2KIT390","price":236.0,"currency_code":"USD","in_stock":true},{"title":"Add Aluminum Flywheel - Recoil Start \/ No Coil","offer_id":43110533857339,"sku":"NR-STAGE2KIT390","price":358.0,"currency_code":"USD","in_stock":true},{"title":"Add Aluminum Flywheel - Recoil Start \/ Add UT2 Coil without Rev Limiter for UT2 Honda","offer_id":43110533890107,"sku":"NR-STAGE2KIT390","price":428.0,"currency_code":"USD","in_stock":true},{"title":"Add Aluminum Flywheel - Recoil Start \/ Add Genuine Honda UT1 Coil","offer_id":43110533922875,"sku":"NR-STAGE2KIT390","price":402.0,"currency_code":"USD","in_stock":true},{"title":"Add Aluminum Flywheel - Electric Start \/ No Coil","offer_id":43110533955643,"sku":"NR-STAGE2KIT390","price":415.0,"currency_code":"USD","in_stock":true},{"title":"Add Aluminum Flywheel - Electric Start \/ Add UT2 Coil without Rev Limiter for UT2 Honda","offer_id":43110533988411,"sku":"NR-STAGE2KIT390","price":485.0,"currency_code":"USD","in_stock":true},{"title":"Add Aluminum Flywheel - Electric Start \/ Add Genuine Honda UT1 Coil","offer_id":43110534021179,"sku":"NR-STAGE2KIT390","price":459.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0589\/5159\/8139\/files\/STAGE2KIT390-2.png?v=1764893753","url":"https:\/\/gtcracing.com\/products\/speed-kit-gx340-to-gx390-420-predator-13-15hp-ohv-stage-2","provider":"GTC Racing","version":"1.0","type":"link"}