The AGV I tried at the NEC last year, but it was such a quick try I can't even remember what I thought of it.
I'll pop over to Fowlers & Hein Gericke in Bristol to try a few on. HG have AGV Ti-Tech's for £199.99 which sounds cheap?
Would never have even condsidered Nitro, KBC etc....maybe worth a look?
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88 NSR250 R2J (work in progress!) & 05 Aprilia SL1000 Falco