Sounds like a similar arrangement to the 140. On the 140, the hose from the flame trap just shoves into the hole in the air filter box. There is no fitting, it is just a really tight fit. If you have a heavy wall rubber hose from the flame trap you may not be able to force it in to the air filter box without some 'shaving' of the hose. I need to spray my hose with silicon lube to get it to go into the hole.
As an alternative, you can ditch the hose connection to the air box and just put one of those little K&N style breather filters directly on the flame trap.
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