Damocles, Yours is the First I've heard of anyone suggesting the addition of a Thermo-Bob would correct the so-called "ovalized" bore. Did you just make that up? Interesting thought non the less.
In my post, I intended disclosing my own ignorance of whether the concept was harbored by anyone or not:
if those of this persuasion [lack of a radiator bypass distorts a cylinder bore] consider installation of a radiator bypass corrects this bore anomaly or not." (Bracketed phrase added to quotation for clarification.)
Again, I apologize for my, "Failure to communicate!"
Does the lack of a Thermo-Bob distort engine cylinder bores? On ALL KLR650s running without radiator bypasses? If so, in the service life of KLR650s, early installation of Thermo-Bobs appear critical, if the ovalization is not corrected by the device.
If a radiator bypass only PREVENTS cylinder bore distortion, I'd wonder whether any non-Thermo-Bobbed engine has a symmetrical cylinder bore; if the bore geometry remains true without a bypass, I'd wonder why. Don't know if the vendor claims avoidance of cylinder bore distortion from use of the product, or offers any test data to that effect.
Just for the record, I think evidence suggests incorrect piston/ring design and/or construction was responsible for the excessive oil consumption of the circa 2008 model KLR650s, not the absence of Thermo-Bobs. What evidence? Fewer instances of excessive oil consumption reported after re-design of pistons and rings by Kawasaki, say, on circa 2009 and later models. My opinion only; YMMV!
Then again, some thought the absence of a PCV Valve Mod was the cause of excessive oil consumption!