{"product_id":"vhm-yamaha-yz85-19-25-cylinder-head","title":"VHM Yamaha YZ85 19-25 Cylinder Head","description":"\u003cp\u003eVHM's gold CNC-machined cylinder head (part AA33176), built around an exchangeable combustion chamber insert. Swapping the insert changes the compression and squish to suit the track, conditions and fuel, without machining the head. The water passages are designed for better cooling and the head seals with O-rings.\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\u003eFEATURES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMore engine power\u003c\/li\u003e\n\u003cli\u003eBetter heat transfer\u003c\/li\u003e\n\u003cli\u003eMore resistance to detonation\u003c\/li\u003e\n\u003cli\u003eExchangeable combustion chamber inserts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eINSERTS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInserts are sold separately, and the head needs one fitted. See the VHM insert listing for this bike\u003c\/li\u003e\n\u003cli\u003eVHM standard insert: AE32286-E (for OEM piston), AE32286-029 (for 12° VHM piston APYZ08521757)\u003c\/li\u003e\n\u003cli\u003eReplacement head O-ring kit: SK33041\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"VHM","offers":[{"title":"Default Title","offer_id":67522028437745,"sku":"SER-VHM-AA33176","price":427.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0703\/0456\/3441\/files\/52199_1.jpg?v=1794689651","url":"https:\/\/goldcoastdirtbikeperformance.com.au\/products\/vhm-yamaha-yz85-19-25-cylinder-head","provider":"Dirt Bike Performance","version":"1.0","type":"link"}