Information provided by
John Oosterhuis, STOC 1058Swingarm Tool Information
The off-set on Honda special tool
(http://inlinethumb56.webshots.com/42487/1402389884053727880S425x425Q85.jpg) (http://rides.webshots.com/photo/1402389884053727880caUuMb)
For the left swingarm pivot bolt lock ring is 47mm. For those of you that would like to make a copy of the tool,
Ed Lee, STOC 5066, made a measured schematic for us (downloadable copy attached below):
(http://inlinethumb09.webshots.com/36424/2781004190053727880S425x425Q85.jpg) (http://rides.webshots.com/photo/2781004190053727880WuWIQA)
I guess if you feel confident that you can maintain (don't affect/increase) the 156 inch pounds of pre-load on the two
swingarm bearings while torquing the lock ring to something a bit greater than 76 foot pounds without using the special tool,
go ahead. But the special tools are available to borrow within the ST1100 community.
For info on borrowing this tool:
http://www.st-riders.net/index.php?topic=545.0