Thermo-Bob 3 for KX450F: 2016 and newer
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This kit is for 2016 and newer Kawasaki KX 450Fs... please see other products for the version that fits other Kawasaki motorcycles.

The KX450F is a popular choice as a snow bike, and in those applications, the lack of factory cooling system control leads to cold coolant temps.  The EFI system ends out overfueling, thinking the bike is constantly in 'warm-up' mode.  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 isn't out yet, but it's almost identical in concept to the KX4A kit.  The main difference is the KX4B kit has an extra hose to connect the Thermo-Bob 3's exit to the factory aluminum "Y" fitting.

A full technical write-up when used on a Kawasaki KLR650 can be found here.
  • Item #: TB3-KX4B

Thermo-Bob 3 for KX450F: 2016 and newer

Price: $139.00
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