ianblewitt
New Member
Andy, My 390 has never experienced cooling problems. Prophylactically, I have fitted a SPAL fan, Engine Ice and a 1.6 bar radiator cap. During operation, the temperature bar sits consistently at 2 bars below hot, and moves very little. Others (unless their bike happens to have a cooling issue) typically report the same temp indication. I think 2 bars below hot is the 390's normal working temperature. So I think your bike is right on spec.
Mine too. It popped up to one bar last summer on the 105*+ day but otherwise generally sits at 2 bars.
Edit- I did have to add some distilled water when I first bought it, the first couple hundred miles I was worried I had gotten a "bad" RC, but before buying cooling stuff to "fix" it, I noticed it was looking pretty low. After filling up to the line with distilled, it hasn't given me any issues at all.
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