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I'm staying with the stock bore and want to get opinions on Nikasil vs Steel sleeve. millennium Technologies does the Nikasil and Geisik does the steel sleeve. Please chime in. Thank you.
 

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Had a sleeve drop once.....will never do another sleeve again.
 

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I've run the nickasil replated cylinders and they are nice I'd say the are even better then the factory plating Yamaha does
 
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