{"product_id":"vhm-yamaha-yz65-18-25-cylinder-head-insert","title":"VHM Yamaha YZ65 18-25 Cylinder Head Insert","description":"\u003cp\u003eExchangeable combustion chamber insert for VHM cylinder head AA33174. Each insert has a different combustion chamber volume, so the compression and power delivery can be set up for the track, conditions and fuel. The last digits of the part number are engraved on the insert.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFITS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eYamaha: YZ65 18-25\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eOPTIONS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e6.80cc - AE32285-C (higher compression)\u003c\/li\u003e\n\u003cli\u003e7.00cc - AE32285-E (VHM standard)\u003c\/li\u003e\n\u003cli\u003e7.20cc - AE32285-F (lower compression)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFEATURES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSmaller volume (higher compression): more bottom-end and mid-range, suits deep sand, needs good fuel to avoid detonation\u003c\/li\u003e\n\u003cli\u003eLarger volume (lower compression): more over-rev and top speed, suits hard-pack\u003c\/li\u003e\n\u003cli\u003eQuick to change at the track\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eFits VHM cylinder heads only, not the OEM head. The head and its O-ring kit are sold separately.\u003c\/em\u003e\u003c\/p\u003e\n","brand":"VHM","offers":[{"title":"6.80cc - AE32285-C (higher compression)","offer_id":67522031878385,"sku":"SER-VHM-AE32285-C","price":112.95,"currency_code":"AUD","in_stock":true},{"title":"7.00cc - AE32285-E (VHM standard)","offer_id":67522031911153,"sku":"SER-VHM-AE32285-E","price":112.95,"currency_code":"AUD","in_stock":true},{"title":"7.20cc - AE32285-F (lower compression)","offer_id":67522031943921,"sku":"SER-VHM-AE32285-F","price":112.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0703\/0456\/3441\/files\/62112_1.jpg?v=1794689722","url":"https:\/\/goldcoastdirtbikeperformance.com.au\/products\/vhm-yamaha-yz65-18-25-cylinder-head-insert","provider":"Dirt Bike Performance","version":"1.0","type":"link"}