High-G FJR Junkie!
Join Date: Apr 2013
Location: Corinth, TX just south of Denton on I35E
I have used Pure Ones (blue painted case, the "new" ones) on my last three oil changes with no leaks.
I still have an old baby shlt yellow one. I compared the two. They pretty much match your second picture. Then I laid a 1/8" thick piece of aluminum across the sealing washer on the edge and measured down to the edge of the central hole. New one (convex) measured 7.56 mm. Old one (concave) measured 10.02 mm.
The new, blue filters, though visibly convex, seal just fine.
Time spent looking at motorcycles, even Harleys, is never wasted.
Series III fairing removal:
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