Thermo-Bob 3 for RM-Z450: 2005-2007
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This kit is for 2005-2007 Suzuki RM-Z450s... please see other products for the version that fits other motorcycles.

When an RM-Z450 is used as a snow bike, the lack of factory cooling system control leads to cold coolant temps.   These carbureted bikes then have inconsistent jetting.  The Thermo-Bob 3 is a machined aluminum housing with a 180°F (82°C) thermostat inside, and modifies your cooling system to operate like automotive systems have for decades... keeping coolant flowing all the time through the engine, but not through the radiators until it is up to a selected temperature. 

There is also a threaded port in the Thermo-Bob 3 that will accept aftermarket temperature gauges such as the KOSO or TRAIL TECH 1/8-28 BSPP temperature sending units.
The Installation Manual can be found here.

A full technical write-up when used on a Kawasaki KLR650 can be found here.


  • Item #: TB3-RM4A

Thermo-Bob 3 for RM-Z450: 2005-2007

Price: $129.00
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