Greg Bender

http://www.thisoldtractor.com/gtbender

Exhaust header pipe nut tool

I extracted this recommendation from Ralf Brinkmann off of the Yahoo! Loopframe_Guzzi news group. In Ralf's own words:

I use "DIN 1810 A" wrenches - very common and low priced in Germany (DIN = German Industrial Standard).

Here are a few places where you can purchase the special hook wrench that will permit you to easily tighten and loosen the exhaust header pipe securing nuts. You'll need one wrench. The outside diameter of the exhaust nuts is 1111111 mm.