Thermo-Bob 3 for YZ450F: 2010-2013
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This kit is for 2010-2013 YZ450Fs... please see other products for the version that fits other motorcycles.

The YZ450F is a popular choice as a snow bike, and in those applications, the lack of factory cooling system control leads to cold coolant temps - then the EFI system overfuels, because it thinks 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 can be found here.

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

  • Item #: TB3-YZ4A

Thermo-Bob 3 for YZ450F: 2010-2013

Price: $129.00
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