I told everybody I thought I blew my motor on 2002 blaster. After pulling down and finding only one problem which I haven't figured out, I put motor back together, re-checked compression with new tester (142psi), then I had weak spark. Pulled rotor assembly off today and found broken keyway. Replaced but don't think assembly is tight enough. Is there a trick to holding rotor while I tighten nut. Now I have Vitos .040 kit that I can use later.