Hi there. I have a 2004 CRF250X into which I'm trying to fit an Athena 280 big bore kit. All good up to the point when I noticed the valves fouling on the piston when turning over. I bought the kit from ebay without gaskets (naively expecting the standard Honda ones to be the same) and am now wondering.... So, my question is should I be fitting different gaskets and if so a). which ones do I need, and . where can I get some in a hurry?! I'd read somewhere that the Athena ones are thicker?? I'm in the UK and so far am having trouble finding a distributor that stocks any Athena kit. I have emailed the good folk at the Thumpertalk shop for their thoughts and am awaiting a reply but in the meantime if anyone can offer any advice I'd be really grateful. Many thanks PS if I buy from the US, any ideas about delivery times etc.