The Watt-Man Thermo-Bob 2 is a cooling system modification for the KLR 650. In stock form, the KLR runs too cool when ridden in temps below about 80F. The colder outside, the worse a stock bike is. The Thermo-Bob 2 eliminates the inconsistent engine temperature and keeps it running at an optimal 195 degrees. Ultimately this leads to better performance and a longer lasting engine.