{"product_id":"bbr-88cc-flat-top-piston-bore-kit","title":"BBR 88cc Flat Top Piston Bore Kit","description":"\u003cdiv class=\"bbr-description\"\u003e\r\n\u003cp\u003eConvert your CRF\/XR50 to an 88cc screamer with this complete kit. Everything is included to upgrade the performance of you mini-bike. This kit uses your stock CRF\/XR50 cylinder head.\u003cbr\u003e\u003cbr\u003eAlso fits 1988-1999 Z50R with short piston.\u003c\/p\u003e\r\n\u003c\/div\u003e\r\n\u003cp\u003e \u003c\/p\u003e\r\n\u003cdiv class=\"bbr-bullet-points\"\u003e\r\n\u003cul class=\"bbr-ul\"\u003e\r\n\u003cli\u003eAluminum BBR cylinder\u003c\/li\u003e\r\n\u003cli\u003eSpecial 52mm piston specially designed to work with your stock cylinder head's combustion chamber\u003c\/li\u003e\r\n\u003cli\u003eBBR special grind camshaft take full advantage of the large piston for great performance\u003c\/li\u003e\r\n\u003cli\u003eSpecial BBR tapered aluminum intake manifold adapts the large carb to the stock intake port size\u003c\/li\u003e\r\n\u003cli\u003e18mm carb includes extra main and pilot jets for easy tuning\u003c\/li\u003e\r\n\u003cli\u003eAlso includes CR style throttle, cable, air filter and top end gasket kit\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/div\u003e\r\n\u003cp\u003e \u003c\/p\u003e\r\n\u003cdiv class=\"bbr-additional-info\"\u003e\r\n\u003cp\u003e\u003cstrong\u003eInstallation Note 1:\u003c\/strong\u003e Throttle unit included with kit will only work with 7\/8\" handlebars and will not mount to stock XR\/CRF50 handlebars. Stock handlebars are 3\/4\".\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eInstallation Note 2:\u003c\/strong\u003e This kit will not work with the Honda XR\/CRF70 or other big port cylinder heads. It is designed for the tiny combustion chamber of the OEM Honda XR\/CRF50 cylinder head. The flat top piston dome will result in an extremely low compression ratio when combine with the XR\/CRF70 type cylinder head. The result is a motor that makes less horsepower than stock. \u003ca href=\"..\/..\/products\/411-HXR-7001\"\u003eClick this link for the BBR bore kit for the CRF\/XR70\u003c\/a\u003e.\u003cbr\u003e\u003cbr\u003e\u003ca href=\"http:\/\/www.bbrmotorsports.com\/Tech\/FAQ\/Documents\/JettingChart.htm\" target=\"_blank\"\u003e\u003cbr\u003eBBR General Jetting Guidelines Chart\u003c\/a\u003e\u003c\/p\u003e\r\n\u003c\/div\u003e\r\n\u003cp\u003e \u003c\/p\u003e\r\n\u003cdiv class=\"bbr-instructions\"\u003e\u003ca href=\"https:\/\/bbrmotorsports.com\/Products\/ItemInfo\/411-HXR-5400\/Instructions\/411-HXR-5400.pdf\" target=\"_blank\"\u003eBBR 88cc Flat Top Piston Bore Kit Instructions\u003c\/a\u003e\u003c\/div\u003e","brand":"BBR Motorsports","offers":[{"title":"Default Title","offer_id":52993770979700,"sku":"411-HXR-5400","price":249.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/2888\/9203\/files\/DSCF4181-3_d32bdf1c-32a4-4c15-a419-d426cc88962d.jpg?v=1756415421","url":"https:\/\/bbrmotorsports.shop\/products\/bbr-88cc-flat-top-piston-bore-kit","provider":"BBR Motorsports","version":"1.0","type":"link"}