Another question from a newbie: Is the thermo bob mod only necessary in colder climates or is it an all around good mod? As far as I understand it it brings the engine up to temperature quicker. Here in South Africa it is quite warm so I am wondering if this mod would cause more harm then good.
I was wondering this same thing for my 07 as I live in South ga. I do notice riding now it barely hits the line in the lower narmal range. That will probably be my next upgrade. I was also thinking of putting the watt man overlay in too.
Just a fun fact:
After the thermostat opens, the KLR650 is at the mercy of air flow and coolant circulation, both unchanged, Thermo-Bob or not. In other words, the Thermo-Bob does not enhance cooling IMHO (although some insist otherwise).
The Thermo-Bob stabilizes engine coolant temperature more thoroughly, and at a higher temperature than the stock cooling system. Competently designed and manufactured, responsibly marketed, thoroughly tested, service life effects remain unquantified.
My ex-South African riding partner (80,000 miles on his '08 model) LOVES his Thermo-Bob; my '07 muddles through without one.
As Tom Schmitz posts above, a Thermo-Bob certainly does no harm (if installed correctly); your call entirely whether to install one or not.