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When I first put my Convert back on the road two years ago, I was using a pair of 7/8" Emgo handlebars. I experienced zero issues using them, but ultimately decided to switch back to the stock handlebars. I have a "weathered" set of original T3 'bars I'll give you (just pay shipping). MG Cycle has new ones:http://www.mgcycle.com/index.php?main_page=product_info&cPath=52&products_id=738Harper's does as well:https://www.harpermoto.com/handlebar-850t-t3-g5-v1000-convert-standard-17600320.html
7/8 is only 0.0089 inches bigger than 22mm -- less than 1/100th of an inch. It's hard to imagine that would make any practical difference.Motocalculation: (7/8) - (22/25.4) = 0.0089 inches difference