Cylinders

Oct 20, 2011
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Is there any cylinder that looks like a blaster cylinder. I know of someone that has a blaster with a different cylinder it's not an aftermarket it's off a different yamaha but looks very like a blaster one there's talk of it being 185cc can anyone help me put ??
 
I know that it's a 66mm bore, it's a person I race with so can't get pics but it's standard appearance and bore but does not have a stamp on the side of the barrel saying the cubic cm. does anyone make a standard bore cylinder that looks the same as standard?

The bike flys so just trying to find out what cylinder it is