{"product_id":"speed-kit-gx240-gx270-9hp-ohv-301-stage-4","title":"Speed Kit; GX240, GX270, 9hp OHV, \u0026 301; Stage 4","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"background-color: rgb(255, 255, 0);\"\u003e\u003ca href=\"https:\/\/gokartsusa.biz\/pages\/speed-kit-selection-guide\" title=\"Speed Kit Selection Guide\" style=\"background-color: rgb(255, 255, 0);\"\u003eSpeed Kit Selection Guide\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv\u003eFor building a serious a GX270 or 301, the Stage 4 kit starts with a package similar to that of the\u003cspan\u003e \u003c\/span\u003e\u003cb\u003eStage 3\u003c\/b\u003e, but adds a ported and milled head with stainless valves, a stud kit, and heavy duty valve train components.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cb\u003eKit Includes:\u003c\/b\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eFully Ported and Milled Race Head\u003c\/li\u003e\n\u003cli\u003e270 Clone Head\u003cspan\u003e \u003c\/span\u003e\u003ci\u003e(Genuine Honda available upon request for additional cost)\u003c\/i\u003e\n\u003c\/li\u003e\n\u003cli\u003eHigh Flow 32mm \/ 28mm Valves with Lash Caps\u003c\/li\u003e\n\u003cli\u003eDual Springs with Titanium Retainers\u003c\/li\u003e\n\u003cli\u003e306 Race Cam\u003c\/li\u003e\n\u003cli\u003eBlack Venom Roller Rockers\u003c\/li\u003e\n\u003cli\u003eValve Cover Spacer\u003c\/li\u003e\n\u003cli\u003eChrome Moly Pushrods\u003c\/li\u003e\n\u003cli\u003eFlat Top Piston\u003c\/li\u003e\n\u003cli\u003eChoice of Carbs\u003ci\u003e\u003cspan\u003e \u003c\/span\u003e(Or use your own)\u003c\/i\u003e\n\u003c\/li\u003e\n\u003cli\u003eBillet Rod\u003cspan\u003e \u003c\/span\u003e\u003ci\u003e(+.020\" Longer)\u003c\/i\u003e\n\u003c\/li\u003e\n\u003cli\u003eOffset Timing Key\u003c\/li\u003e\n\u003cli\u003eCarb, Head, \u0026amp; Case Gaskets\u003c\/li\u003e\n\u003cli\u003eARP Bolt Kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e*Note:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003ePicture is for reference only. See above description for actual content.\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eThese kits are intended for experienced engine builders. Some clearance, fitment, or other engine building \"tricks\" may be needed. \u003c\/span\u003e\u003cspan\u003eBillet aluminum flywheel REQUIRED.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003cbr\u003eUT2s 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. If using a billet flywheel, you must run a UT1 style coil (single wire). \u003c\/span\u003e\u003cspan\u003eChinese engines 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\u003cspan\u003e\u003cbr\u003eIf ordering for a 301, be aware that some engines have large cam journals (.6357), and most 301s have standard cam journals (same as GX270s). If you have a 301, we recommend you measure your cam journals before ordering this. (If in doubt, order the small journal.)\u003c\/span\u003e\u003c\/div\u003e","brand":"GoKarts USA®","offers":[{"title":"No Carburetor \/ No Flywheel","offer_id":43110533333051,"sku":"NR-STAGE4KIT270","price":845.0,"currency_code":"USD","in_stock":true},{"title":"No Carburetor \/ Billet Aluminum Flywheel (GX240 \u0026 GX270)","offer_id":43110533365819,"sku":"NR-STAGE4KIT270","price":1065.0,"currency_code":"USD","in_stock":true},{"title":"24mm Bored 3-Circuit Carb Gas with Filter Assembly \/ No Flywheel","offer_id":43110533398587,"sku":"NR-STAGE4KIT270","price":936.0,"currency_code":"USD","in_stock":true},{"title":"24mm Bored 3-Circuit Carb Gas with Filter Assembly \/ Billet Aluminum Flywheel (GX240 \u0026 GX270)","offer_id":43110533431355,"sku":"NR-STAGE4KIT270","price":936.0,"currency_code":"USD","in_stock":true},{"title":"28mm Gas Black Round Slide \/ No Flywheel","offer_id":43110533464123,"sku":"NR-STAGE4KIT270","price":998.0,"currency_code":"USD","in_stock":true},{"title":"28mm Gas Black Round Slide \/ Billet Aluminum Flywheel (GX240 \u0026 GX270)","offer_id":43110533496891,"sku":"NR-STAGE4KIT270","price":998.0,"currency_code":"USD","in_stock":true},{"title":"28mm Flat Slide Mikuni - Gas \/ No Flywheel","offer_id":43110533529659,"sku":"NR-STAGE4KIT270","price":1113.0,"currency_code":"USD","in_stock":true},{"title":"28mm Flat Slide Mikuni - Gas \/ Billet Aluminum Flywheel (GX240 \u0026 GX270)","offer_id":43110533562427,"sku":"NR-STAGE4KIT270","price":1333.0,"currency_code":"USD","in_stock":false},{"title":"28mm Flat Slide Mikuni - Methanol \/ No Flywheel","offer_id":43110533595195,"sku":"NR-STAGE4KIT270","price":1085.0,"currency_code":"USD","in_stock":true},{"title":"28mm Flat Slide Mikuni - Methanol \/ Billet Aluminum Flywheel (GX240 \u0026 GX270)","offer_id":43110533627963,"sku":"NR-STAGE4KIT270","price":1305.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0589\/5159\/8139\/files\/STAGE4KIT270-2.png?v=1764893759","url":"https:\/\/gtcracing.com\/products\/speed-kit-gx240-gx270-9hp-ohv-301-stage-4","provider":"GTC Racing","version":"1.0","type":"link"}