my brother just bought this bike its in very good condition and about 13000. ks on it he rode it for aBOUT 130 KS AND THE DIP STICK POPED UP AND BLEW MOST OF THE OIL OUT OF IT SO HE TRAILERED IT HOME THEN CLEANED IT UP THEN TOPPED UP THE OIL THE WENT FOR ARIDE AROUND TOWN AN STARTED TO LEAK OIL AROUND THE FILLER ALL I CAN THINK OF IS THE BREATHER TUBES COULD BE BLOCKED I LIVE A 200 KS AWAY FROM HIM SO I HAVENT HAH A CHANCE TO HAVE A LOOK AT IT HE TELLS ME THE AIR CLEANER SET UP LOOKS STANDARD WHATS YOUR THOUGHTS THANKS