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Hi , You cannot bore Alusil cylinders , if the cylinders measure out ok without damage they clean the bore then apply a special paste to the bore to put the silicone back into the Alusil , The rings actually don’t touch the cylinder they glide on microscopic silicone produced from the Alusil , some crazy technology.
You can have sleeves installed , but there are shops now that can repair and refinish the Alusil , a couple years ago you had to sleeve the block to run forged pistons , now they make special forged rings and pistons that are compatible with Alusil , You can search on YouTube how to refinish Alusil , it’s seems to be a fast process but it has to be precise
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