{"product_id":"culatin-cilindro-italkit-ci-34-085-gr-ktm-85-sx-18-25-d-47mm-piston-12º","title":"Cylinder head Cylinder Italkit CI.34.085.GR KTM 85 SX 18-25 d.47mm piston 12º ","description":"\u003cp\u003e\u003cstrong\u003eItalkit Ø47 mm cylinder head insert\u003c\/strong\u003e for the \u003cstrong\u003eCI.34.085.GR\u003c\/strong\u003e cylinder kit for the \u003cstrong\u003eKTM 85 SX 2018-2025\u003c\/strong\u003e, specifically designed to work with the \u003cstrong\u003eItalkit 2984M piston with a 12° crown\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eIf you are building a 2-Stroke engine, the cylinder head insert is one of those parts where \u003cstrong\u003eyou cannot just fit any one\u003c\/strong\u003e. The shape of the combustion chamber and, above all, the geometry of the \u003cstrong\u003esquish\u003c\/strong\u003e have a direct influence on how the engine compresses, burns the mixture, and delivers power.\u003c\/p\u003e\n\n\u003cp\u003eThis cylinder head insert is machined to match the \u003cstrong\u003e12° profile of the 2984M piston\u003c\/strong\u003e. In this way, when the piston reaches TDC, the squish band maintains the correct geometry and pushes the mixture from the outside toward the center of the chamber. That is exactly where it needs to be: \u003cstrong\u003econcentrated around the spark plug and with high turbulence just before ignition\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eWhat do we achieve with this? Faster and more controlled combustion and, with the squish correctly adjusted, an engine that \u003cstrong\u003eresponds more forcefully to throttle input, pulls better through the mid-range, and keeps driving when it starts working at higher RPM\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eAnd here is the important point: the \u003cstrong\u003e12° piston and this cylinder head insert are designed to work together\u003c\/strong\u003e. If we fit a cylinder head insert with different geometry, we can alter the squish band, the compression ratio, and the shape of the chamber, losing precisely the performance we are looking for in a build of this level.\u003c\/p\u003e\n\n\u003cp\u003eCombined with the \u003cstrong\u003esingle-ring Italkit piston\u003c\/strong\u003e, we have a setup very much focused on an 85cc Racing engine: less friction in the piston to gain RPM quickly and a \u003cstrong\u003ecombustion chamber designed to take advantage of that rotational speed when the engine starts to rev out\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter:\u003c\/strong\u003e Ø47 mm.\u003c\/li\u003e\n\u003cli\u003eSpecific for the \u003cstrong\u003eItalkit 2984M piston\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eGeometry for a piston with a \u003cstrong\u003e12° crown\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eDesigned to work with a \u003cstrong\u003especific squish band\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eCompatible with the \u003cstrong\u003eItalkit CI.34.085.GR\u003c\/strong\u003e cylinder kit.\u003c\/li\u003e\n\u003cli\u003eApplication: \u003cstrong\u003eKTM 85 SX 2018-2025\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eInstallation tip:\u003c\/strong\u003e with an assembly of these characteristics, it is worth measuring the \u003cstrong\u003eactual squish once the engine is assembled\u003c\/strong\u003e. This is a critical measurement to achieve the desired performance and to ensure that the piston and cylinder head insert work with the correct clearance.\u003c\/p\u003e","brand":"Italkit","offers":[{"title":"Default Title","offer_id":67612949283207,"sku":"CU.34.85.3","price":47.43,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0860\/6223\/5959\/files\/CU.12.85.3.webp?v=1790933049","url":"https:\/\/motoscoot.net\/en\/products\/cylinder-head-cylinder-italkit-ci-34-085-gr-ktm-85-sx-18-25-d-47mm-piston-12%c2%ba","provider":"Motoscoot","version":"1.0","type":"link"}