This one has been popular recently, thinking about getting one for the 250r.
https://www.google.com/shopping/product/1128315404658086039?q=trail%20tech%20tto&oq=trail+tech+tto&gs_l=products-cc.3...7940.9510.0.10197.14.11.0.2.2.0.113.812.8j3.11.0...0.0...1ac.1.9.products-cc.hy8Yt0wqyhU&sa=X&ei=jWFoUZSrDMai2wXCy4GwAQ&ved=0CGgQ8gIwAg
Maybe so, I set them to 48.5mm this last trip and the bike ran great. I've tried purging with PJs open, all the way closed, no dice. This last time with the PJs closed it started spitting fuel out the overflows like crazy.