Once I had split the casing, I noticed that it did not have the coiled kickstart spring. One is shown in the picture sat in the greased area, but this is a new one. However, there is a piece of sprung metal fixed to the casing, (two bright steel pins holding it in place) which looks like it pushes up on the kickstart quadrant gear. But looking at photos of other casings, I have never seen this sprung metal before. Has anyone any clues as to what it is??

