M
mtn-doo
Well-known member
Hey Guys,
I have installed and tested the 180 degree thermostat system from Thermo-Bob. The results and excellent. This system has a 180 thermostat and a bypass system making a closed loop with the coolant in your cylinder. The difference and big advantage is it does "not" leak coolant past the stat. With the 70 degree KTM thermostat, there are two machined bypass ports on the sides of the thermostat housing. Those allow the coolant to immediately flow through the thermostat to the radiators regardless of temperature. You can see this when you start your bike and immediately see steam and feel warmth on the tops of your radiators. The negative result of that system is that it circulates coolant continuously to the radiators and your engine never gets to a good operating temp, 180/190 degrees F.
With the Thermo-Bob system, there is "no" flow/by coolant to the radiators. The thermostat is sealed closed until the coolant reaches 180F. The re-circulation line in the Thermo-Bob recirculates cylinder coolant in a closed loop. The Coolant quickly climbs to 180F, only then is coolant allowed past the thermostat to the radiators. When the thermostat does open at 180F, It modulates flow and the temps observed stay consistent between 176 and 182 degrees. There is not a "cold flush" from the radiators. This is partly due to the recirc line feeding "hot" coolant into the return line from the radiators, warming the cold fluid.
In all conditions it has kept coolant temps in a good operating range which also helps heat the oil. I combined this system with a simple "closed cel foam" pad between the skid plate and belly of the case. The results after consecutive rides. Oil clear and "honey colored", oil level still in the sight glass approx 3/4 up the window. I had one test run in single degit temps and deep/dry powder. In those conditions I did get the familiar temp drop. I noticed however, when I got out of the deepest, dry pow, it would climb right back to 180'ish, which would vent the crank case of any moisture etc.
Here are pics of the install on a 2013 SXF450. I will be helping "Bill", the manufacturer, with determining fitment on all current makes and models. Excellent system that will add life and health to your snow bike.
For all info contact; Bill at, http://shop.watt-man.com/Thermo-Bobs_c4.htm
or contact your local power sports dealer for ordering.
I have installed and tested the 180 degree thermostat system from Thermo-Bob. The results and excellent. This system has a 180 thermostat and a bypass system making a closed loop with the coolant in your cylinder. The difference and big advantage is it does "not" leak coolant past the stat. With the 70 degree KTM thermostat, there are two machined bypass ports on the sides of the thermostat housing. Those allow the coolant to immediately flow through the thermostat to the radiators regardless of temperature. You can see this when you start your bike and immediately see steam and feel warmth on the tops of your radiators. The negative result of that system is that it circulates coolant continuously to the radiators and your engine never gets to a good operating temp, 180/190 degrees F.
With the Thermo-Bob system, there is "no" flow/by coolant to the radiators. The thermostat is sealed closed until the coolant reaches 180F. The re-circulation line in the Thermo-Bob recirculates cylinder coolant in a closed loop. The Coolant quickly climbs to 180F, only then is coolant allowed past the thermostat to the radiators. When the thermostat does open at 180F, It modulates flow and the temps observed stay consistent between 176 and 182 degrees. There is not a "cold flush" from the radiators. This is partly due to the recirc line feeding "hot" coolant into the return line from the radiators, warming the cold fluid.
In all conditions it has kept coolant temps in a good operating range which also helps heat the oil. I combined this system with a simple "closed cel foam" pad between the skid plate and belly of the case. The results after consecutive rides. Oil clear and "honey colored", oil level still in the sight glass approx 3/4 up the window. I had one test run in single degit temps and deep/dry powder. In those conditions I did get the familiar temp drop. I noticed however, when I got out of the deepest, dry pow, it would climb right back to 180'ish, which would vent the crank case of any moisture etc.
Here are pics of the install on a 2013 SXF450. I will be helping "Bill", the manufacturer, with determining fitment on all current makes and models. Excellent system that will add life and health to your snow bike.
For all info contact; Bill at, http://shop.watt-man.com/Thermo-Bobs_c4.htm
or contact your local power sports dealer for ordering.
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