{"product_id":"dhm-high-compression-stock-bore-piston-for-the-2022-honda-grom-monkey-gen-2","title":"DHM High Compression Stock Bore Piston - 2022+ Honda Grom \/ Monkey (Gen 2)","description":"\u003cp\u003eHigh compression stock bore piston for the new 2022+ Grom\/Monkey. DHM took their development experience from the previous generation Grom and CRF110 and applied it to the all new Grom engine and have come up with a lightweight, high compression piston that still utilizes the OEM 12mm pin size. \u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e~12.4:1 compression 50mm stock bore piston\u003c\/li\u003e\n\u003cli\u003e100% Forged construction\u003c\/li\u003e\n\u003cli\u003eLarger ring and skirt oiling holes than other pistons on the market\u003c\/li\u003e\n\u003cli\u003eLarger oil spring to increase oil volume between the oiling rings\u003c\/li\u003e\n\u003cli\u003eOEM sized skirt area to maintain reliability\u003c\/li\u003e\n\u003cli\u003eRacing piston ring kit with pins and circlips\u003c\/li\u003e\n\u003cli\u003eIncludes a new base and head gasket.\u003c\/li\u003e\n\u003cli style=\"font-weight: bold;\"\u003e\u003cstrong\u003eNGK CR9E spark plug required \u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eRequires at least 91 octane fuel\u003c\/li\u003e\n\u003cli\u003eRequires ECU Flash or other Engine Management (aRacer, etc)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIncreasing the compression ratio on the stock bore significantly improves the engine's throttle response and overall power. In comparison to the stock piston, you can expect more low, mid and top end power while maintaining the use of your stock cylinder. They've designed this piston to be as close to the stock weight as possible without sacrificing any structural integrity. It can clear big valve head with 27\/22 valve diameters and it will drop right in to your OEM cylinder. \u003c\/p\u003e\n\u003cp\u003eYou will need either an ECU flash or some sort of fuel controller for this to run properly.\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003e**Installing this piston requires setting the ring gaps. If you are not comfortable with this, please have your local shop perform the install. Failure to set the proper piston ring end gap can result in premature failure or seizure of the engine. We recommend an end gap of .007-.008\" on the top ring and .009-010\" on the bottom ring. The silver ring goes on top and the black ring below. \u003c\/strong\u003e\u003c\/p\u003e","brand":"DHM","offers":[{"title":"Default Title","offer_id":45216589086902,"sku":"DHM-GRM12.4.1","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2662\/9646\/files\/DHMHIGHCOMPGROM.jpg?v=1783007886","url":"https:\/\/faster-minis.com\/products\/dhm-high-compression-stock-bore-piston-for-the-2022-honda-grom-monkey-gen-2","provider":"Faster-Minis","version":"1.0","type":"link"}