Yamaha FJR Forum : Yamaha FJR Owners Forums - View Single Post - Radiator Flush Question
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post #6 of (permalink) Old 07-31-2020, 12:45 PM
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Join Date: Jun 2020
Location: Auburn WA
Posts: 105
Originally Posted by mobilemike View Post
Unless you see evidence of gunk and junk in the cooling system, flushing is over rated. Especially 3 times. Holy ****.

The Fjr has a bypass in the cooling system so pulling the T-stat or waiting for it to open is not necessary.

Just drain the old stuff. Fill with water and run it for a few minutes, then drain it again. Fill it with whatever coolant you like, burp it and be done.
Agreed Mike .. thats why I suggest RMI 25 .. after using for a few hundred miles all you do is drain the system and clean out the over flow tank ..then refill
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