After 1 year, many hours of work, 16 moulds, some carbon parts born for scrap, some of them with very short riding life, some sticking conditions from moulds to parts and vise versa, I finished my motocross carbon project!

I am back with a new mould for the subframe of Aprilia MXV, easier to work with especially during sealing the vacuum bag and with  provision for extra material in the mounting points. Also it is made with epoxy gelcoat backed up with vinyl ester resin. I am really satisfied with the first piece that came from this mould. I followed the advise that I read here for giving epoxy the chance to flow with more ease downwards than just crossing the mould, by making a barrier before the suction hose in order to stop the flow going to the catch pot, wetting the fiber layer stack completely. I am really thankful for this advice. So this resulted with a carbon thickness in the mounting points of more than 15 mm and with no surface voids, making it safe to trim and level the joints with no risk of coming to thin and weak. Final weight is 1050 gr, which is -370 gr less  than the aluminium version. 
Making the split mould :


Laying down the stack, in the mounting points I lost counting, over 20 layers for sure :

The result :





So this is the Mk.3 version of subframe, which is similar to Mk.2 (produced with the previous version of mould), but it is easier to produce and giving almost no risk on scrapping the final piece. Really happy with the result.