{"product_id":"vhm-yamaha-yz85-19-25-cylinder-head-insert","title":"VHM Yamaha YZ85 19-25 Cylinder Head Insert","description":"\u003cp\u003eExchangeable combustion chamber insert for VHM cylinder head AA33176. 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: YZ85 19-25\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eOPTIONS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e8.20cc - AE32286-C (higher compression)\u003c\/li\u003e\n\u003cli\u003e8.40cc - AE32286-E (VHM standard, OEM piston)\u003c\/li\u003e\n\u003cli\u003e8.60cc - AE32286-F (lower compression)\u003c\/li\u003e\n\u003cli\u003e8.40cc - AE32286-029 (VHM standard, 12° piston)\u003c\/li\u003e\n\u003cli\u003eAE32286-032\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\u003cli\u003e12° inserts are for VHM 12° pistons only\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":"8.20cc - AE32286-C (higher compression)","offer_id":67522031976689,"sku":"SER-VHM-AE32286-C","price":112.95,"currency_code":"AUD","in_stock":true},{"title":"8.40cc - AE32286-E (VHM standard, OEM piston)","offer_id":67522032009457,"sku":"SER-VHM-AE32286-E","price":112.95,"currency_code":"AUD","in_stock":true},{"title":"8.60cc - AE32286-F (lower compression)","offer_id":67522032042225,"sku":"SER-VHM-AE32286-F","price":112.95,"currency_code":"AUD","in_stock":true},{"title":"8.40cc - AE32286-029 (VHM standard, 12° piston)","offer_id":67522032074993,"sku":"SER-VHM-AE32286-029","price":157.95,"currency_code":"AUD","in_stock":true},{"title":"AE32286-032","offer_id":67522032107761,"sku":"SER-VHM-AE32286-032","price":157.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0703\/0456\/3441\/files\/62117_1.jpg?v=1794689723","url":"https:\/\/goldcoastdirtbikeperformance.com.au\/products\/vhm-yamaha-yz85-19-25-cylinder-head-insert","provider":"Dirt Bike Performance","version":"1.0","type":"link"}