THERMOBOB - YZ450FThe YZ450F has no factory thermostat, causing wide fluctuations in coolant temperature. Due to these fluctuations, the EFI system overfuels, thinking the engine is always in "warm up" mode. The Thermo Bob 3 solves this by: Using a machined aluminum housing. Containing a 180F (82C) thermostat. Modifying the cooling system to mimic automotive systems. Ensuring coolant flows continuously through the engine. Restricting flow through the radiators until
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