Information, Articles


Thermo-Bob 2™
Thermo-Bob 2: Kawasaki KLR650, 2008-current
Thermo-Bob 2: Kawasaki KLR650, 1987-2007
Thermo-Bob 2: Kawasaki KLX250s, 2006-current
Thermo-Bob 2: Kawasaki KLR600 - 1984-1987 (not officially published yet - contact me at
Thermo-Bob 3™
Thermo-Bob 3: "CR4A" Kit
Thermo-Bob 3: "CR4B" Kit
Thermo-Bob 3: "CR4C" Kit
Thermo-Bob 3: "H511" Kit (Husqvarna TE449/511, 2011-2014)
Thermo-Bob 3: "KLRE" Kit (Kawasaki KLR650, 2008-current)
Thermo-Bob 3: "KT4A" kit (KTM450 SX-F, XC-F, Husky FC450, 2013-2015)
Thermo-Bob 3: "KT4B" kit (KTM450 SX-F, XC-F, Husky FC450, 2016-18)
Thermo-Bob 3: "KT4F" Kit (KTM450 SX-F, XC-F, Husky FC/FX450, 2019)
Thermo-Bob 3: "KT5" Kit (Various KTM XC-W and EXCs, Husaberg 501, Husky 501)
Thermo-Bob 3: "KX4" Kit (Kawasaki KX450F, 2006-current)
Thermo-Bob 3: "RM4" Kit (Suzuki RM-Z450, 2008-current)
Thermo-Bob 3: Versys Kit (Kawasaki Versys 650, 2015-2016)
Thermo-Bob 3: "WR4" Kit (Yamaha WR450F: 2003-2015, YZ450F: 2014-2018)
Thermo-Bob 3: "YZ4A" Kit (Yamaha YZ450F, 2010-2013)
Thermo-Bob 3: "YZ4B" Kit (Yamaha YZ450F: 2014-2018, WR450F: 2016-2018)

Thermo-Bob 4™
Thermo-Bob 4: "KT35A" Kit (KTM 350 SX-F & XC-F: 2011-2015)
           Thermo-Bob 4: "KT35B" Kit (KTM350 SX-F & XC-F: 2016 and newer)
Thermo-Bob 4: "KT4A" Kit (KTM 450 SX-F & XC-F: 2013-2015)
           Thermo-Bob 4: "KT5A" Kit (2016 and older KTM500's, primarily)
           Thermo-Bob 4: "KT5B" Kit (2017 and newer KTM500's primarily)

Thermo-Bob Original™

Thermo-Bob Original: Kawasaki KLR650, 2008-2018
Thermo-Bob Original: Kawasaki KLR650, 1987-2007

Thermo-Bob Original: Kawasaki KLR250 - 1984-2005
Thermo-Bob Original: Kawasaki Versys 650 - 2006-2014

Thermo-Bob 1™

Thermo-Bob 1: Universal Application
Thermo-Bob 1: Kawasaki Concours, 1986-2006

Coolant Temp Face Overlays
KLR650 - 2008-2018 (Lexan)
KLR650 - 1987-2007 (Paper)


What are the Different Thermo-Bobs?

Frequently Asked Questions (FAQ)

Testing Results / History

Oil Burn History on my 2004 KLR650 with Thermo-Bob

Review in Motorcycle Consumer News, May 2014
Review at, July 2008

Review in MOTORCYCLIST Magazine, January 2010

YouTube Installation Video of Thermo-Bob 2™ AND Lexan Temperature Gauge Face Overlay

Improving Cooling System Margin (How not to run 220, 230, 240°F in the Summer)

Schematic for a Manual Fan Switch (2007 and older models)


Review of 'Great Basin™' Saddlebag from Giant Loop Moto


KLR650 Timeline

KLR650A and E Production Estimates and ID Numbers

Installing a Doohickey 'Torsion Spring'

Recalibrating your KLR650 Speedometer (Watt-man's method)

Recalibrating your KLR650 Speedometer (Len P's method)

HOW many miles do you have on that KLR?

Modifications to my KLR

Oil Pressure Characteristics

Installing Zerks in your rear suspension

Why I like the IRC GP110 tire for the KLR


Installing a 17 tooth front sprocket

The WD40 Experiment

Chain and Sprocket Wear

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