Filling Antifreeze Question - Kawasaki KLR 650 Forum
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post #1 of 2 Old 10-21-2013, 08:46 PM Thread Starter
1st Gear
Join Date: May 2013
Location: Panhandle of Texas
Posts: 66
Filling Antifreeze Question

Have a Thermo-Bob ordered. The old thermostat has a a hole in the side so antifreeze can flow through easily. With the Thermo-Bob in place how do I fill the antifreeze and remove any air? Is there a way to "burp" it or is it unnecessary? Thanks
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post #2 of 2 Old 10-21-2013, 09:14 PM
5th Gear
Join Date: Jan 2011
Posts: 4,520
I know the Thermo-Bob has its following; however--I know of no maintenance issue associated with the stock cooling system, operated within safe limits.

Nevertheless, IMHO; YES! You must burp your radiator for optimum cooling, Thermo-Bob or not.


Same way; run engine with radiator cap OFF 'til thermostat opens and coolant circulates freely, expelling air from system; shut 'er down, top off radiator and reservoir; button 'er up and ride on!

After the thermostat opens, again, Thermo-Bob or not, ain't no difference in cooling system operation, AFAIK.

If you receive different instructions, vis-a-vis burping, with your Thermo-Bob, I defer to the manufacturer's guidance.

That said, the Thermo-Bob definitely stabilizes coolant more thoroughly, and at a higher temperature, than the stock cooling system. The product appears well-designed, thoroughly tested, and competently manufactured.

My friends have 'em and are happy with 'em; I just remain unaware of any problem the Thermo-Bob solves, any reliability, durability, or performance improvement offered.

YMMV; and--the Thermo-Bob, "First, does no harm," to paraphrase the Hippocratic Oath.

Last edited by Damocles; 10-22-2013 at 02:08 PM.
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