Check this out,
METRIC Nitrile Rubber O-Rings 63mm x 2mm 63 ID x 2 Thick NBR70 Seals, sorry its not the link, but copy this into fleabay & you will get 10 O ring gaskets for your 400/4 float bowls at a tiny price compared with Honda or aftermarket = 10 for £2.88 incl postage! No need to thank me, beer tokens will do. Its amazing what you find when you know the sizes of stuff.
