Lesviffer750 wrote:Does any one know if an mc18 rad is the same as the mc21, ie, shape and fittings, in other words will it replace my 21 rad? Cheers.

There is a thread about curved MC18 rads of the HRC type, but you'll need to join as a titanium member to view the specific info...........

http://www.nsr250.net/forums/viewtopic.php?t=7566

You will be able to find regular MC21 rads on Ok!Shon / Yahoo Auctions or get Moriwaki Man on the case
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Rich
MC21 Track Bike / RS250 NF5 'Spencer', NX5 'Cadalora' & NXA 'Aoyama' / RS500 / Two Brothers Racing RC30