It seems only a few years ago now ( actually it was in the 1970's) that my neighbour and I co-ran an old JAP 4-stud 500cc Ex-Speedway engine in a Tig Perry (ANTIG) Grass Track frame. During some winter maintenance there came a need to split the crankcases ------ which were "reluctant" to say the least, SO }---- whilst dear Mother was out shopping "in town" we did the heat-soak method in her gas oven !! Later that week at our club meeting (Tadley & District Sporting Motorcycle Club) one of the wise, old sages enlightened us about the MAGNESIUM CRANKCASES and it's burning properties -- have a look at this }----
http://en.wikipedia.org/wiki/Magnesium -----------------....Needless to say Mum knew nowt about this !!!!