castle nuts for axle for st70

hi there.

castle nuts for axle, split pins and washers. is it the same size castle nuts for front and back axle for both st50 and st70? and is it the same size for both the front or the back, i seem to think that they're different sizes.

can anyone confirm the sizes of these castle nuts? i have st70 frame st50 engine.

anyone know a cheap site or place to get these? regards.

The size is 12mm back and front but of the fine thread type and you can still get them from Honda for about 4 quid each. Give your local dealer a call and they will be able to confirm the price. No doubt you can get them from the web somewhere but will probably cost the same after postage.

thanks for reply. i have seen a picture, seems the front castle nut is smaller than the back, is that right? i have an early 70s k2 model.

Hi mate i have just done a full restoration on one of my bikes. and i got my nuts of ebay dirt cheep you even get the split pins
Silky

I'm no expert but according to the parts manual they are the same size for the k0 thru to the K3, I know parts often get superseded ie the orginal spindle has been changed but I don't think they changed the actual size of the spindle. Prehaps someone changed the castle nut sometime in the past as japanese hex nuts are often smaller than the type you can buy off the shelf. for example a metric 8mm japanese nut takes a size 12 spanner but an 8mm nut off the shelf will be a size 13. Hope that helps.