You do not check it running on the TW. In Bdub's tutorial in the Technical Write Up's Section, Beginners Guide to Base Gasket Replacment (https://tw200forum.com/forum/technica...placement.html), there is a video on how to restore timing. Here it is, enjoy:
Here's a good video in the Picture's & Video's section/Instructional video's for adjusting the valves https://tw200forum.com/forum/maintena...djustment.html. A different, but effective way. Maybe it include's the tool(s) used. I haven't watched it for a while.
Besides the 10mm wrench, to hold the adjuster I've used, in no particular order, needle nose pliers, deck screw, and a tool a forum member made and sent me. At Yamie, they have the correct tool which shouldn't cost much either.