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Old December 3rd, 2014, 03:30 PM   #16
jkv45
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Name: Jay
Location: WI
Join Date: Jul 2013

Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes

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MOTM - Jun '18, Oct '16
Quote:
Originally Posted by LNasty View Post
hmmmmm, will have to check that out. I know they just flushed my system a couple thousand miles ago when I have valves done.
First thing would be to check the coolant levels in the radiator (engine cold) and overflow tank.

If that's good, you could run it until the fan kicks on, then check the temp of the radiator where the switch is mounted with an infrared thermometer. That would tell you what temp the switch was turning the fan on at, and by doing some research you could tell if it was correct.

If that checks out, I would think you have a blockage in the radiator or something restricting flow and/or cooling.
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