Thermo-Bob 4 for KTM450 SX-F & XC-F plus Husky FC450: '13-'15
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Yes, we have Thermo-Bob 3 as well as Thermo-Bob 4 kits for 2013 thru 2015 KTM450 SX-F and XC-Fs, and the 2014 and 2015 Husqvarna FC450... please see other products for the version that fits other model years of the KTM 450s , or the KTMs that come with a factory thermostat and cooling fan.

We've had the Thermo-Bob 3 out for a few years for the KTM450, and wanted to create a cleaner version that would not require an extra hose with the kit - thus this new Thermo-Bob 4, which has a side entrance and top exit, at a lower price than the Thermo-Bob 3.

The KTM and Husqvarna 450s are popular choices as snow bikes, and in those applications, the lack of factory cooling system control leads to cold coolant temps.  The EFI sees cold coolant and overfuels, thinking the bike is constantly in 'warm-up' mode.  The Thermo-Bob is a machined aluminum housing with a 176°F (80°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 4 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.

WE ALSO CARRY PST ENGINE JACKETS, click below under "Related Items" to learn more.

  • Item #: TB4-KT4A

Thermo-Bob 4 for KTM450 SX-F & XC-F plus Husky FC450: '13-'15

Price: $129.00
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