The trip to SA was going to be in Sept. The Pendine meet is in May. This accelerates preparation. The high compression pistons I ordered will not be here in time for me to break them in and to fuss over the tuning. A set of Triumph pistons were ordered. These are what Triumph calls "High Comp Anodized" in their parts book. The clean piston is one of them and the carboned one is a standard one. Triumph simply lowered the gudgeon pin hole to raise the compression. The casting, gudgeon pin, and rings are the same as the standard piston. They put more valve cutaway in the hi-comp slug, as shown. These pistons have not been used with these cams and bigger intake valves. A clearance check is in order. The pistons are fitted onto the rods without rings or pin clips as shown in the second pix.