Hello, I'm just returning to owning a trials bike after a gap of 30 yrs or so! Yesterday I bought a Bultaco that has also been away from the sport for a similar amount of years. The bike has frame number B 9202989 and engine PM9101464. The frame has the aluminium bash plate instead of bottom tubes. The tank and seat/side panels are one piece molded with ribs on the side panels. I'm not too worried if the bike is a bitsa but would welcome any info on what I've bought.