I bought some Tyga pipes for my Wolf half way through last season, the pair weighed less than one Suzuki pipe.
I didn't notice any performance difference but it was so much more manoeuvrable.
Hang on a minute, I'd better be careful not to talk myself into spending several hundreds pounds for no reason.
Last year I showed some of the NSRs in action to somebody, he said, "what a waste of a good NSR"
I'm tempted to agree but on the other hand keeping your NSR in a cocoon could also be called a waste.