Hi The angle of the low clip ons means that the brake fluid is at best half way up the sight glass and sometimes considerably less depending on where I turn the handlebars. However, I can't find a level position to top it up. No matter what position I have the bike on the stand or where I turn the bars the fluid is up the top of the reservoir in one corner and dry at the opposite one. Just seems odd, and I worry it could get air in the lines.