Honda Motorcycles - FireBlades.org banner
1 - 7 of 7 Posts

·
Premium Member
Joined
·
32,034 Posts
Anyone found a reference for what temperature the radiator fan should turn on?
Like all water-cooled engines the fan should come on just after boiling point - around 102C.
 

·
Premium Member
Joined
·
32,034 Posts
water under pressure won't boil at 100c btw :D
Yes, I know :)
Boiling point as a constant though is 100C at sea level.
Under cooling system pressure it's slightly higher, hence the "just after boiling point" statement.
 

·
Registered
Joined
·
374 Posts
Discussion Starter · #7 ·
Thanks guys. I finally found the reference in the service manual.

Fan motor switch

Start to close (ON) 98-102 C (208-216 F)
Stop to open 93-97 C (199-207 F)

Strange because mine use to to turn at about 195-198 F.
 
1 - 7 of 7 Posts
Top