Or you could use the correct wrench. I was amazed that I had this wrench in my tool kit. It has an off set in it to clear the fins. I don't see how a flat wrench would work,, unless you removed the gas tank maybe. How are you guy's doing it.
I would take a pic of mine,, but I trashed my camera. Here's one one ebay.
The reason for me even having my TX750 is because of the tool kit. I went to look at the bike, but the motor was locked up so I passed. But I wanted the tool kit. Offered the guy $20 for it since it was correct for my 72 XS2. He declined my offer. Wanted to keep the tool kit with the bike since other people were coming to look at it.
After a couple of days of rejection's from lookers on the locked up bike, I called him and asked did he want the $20. He said come and get the tool kit. As I was leaving, he asked for an offer for the bike. I said I didn't want it. After a little back and forth,,, I got the bike for $40.
OK. Sorry I got side tracked.
The manual says to use the "Valve adjusting tool found in the Special tool kit". What is this tool.