Bike doesn't get warm

[Silver_Fox]

No matter how long/fast/slow I ride, the temp gauge only rises about 10% (CBR600 F3)

The only time I've seen it rise properly is stationary waiting for a rideout (with about 100 bikes nearby causing the air temp to be particularly warm). Knackered thermostat?

[chris-red]

[Silver_Fox]

Shirley it would be dead centre on the gauge? Not just above the first horizontal line...

(Library pic)
https://i.ebayimg.com/00/s/MTIwMFgxNjAw/z/jPIAAOSwwE5WYZlE/$_57.JPG

[arry]

Mine used to run at around third up the gauge unless sitting in traffic or stopped on idle and it'd go to just over half way when the fan would kick in

Changed thermostat and same
But if you're not getting the fan kicking in ever then I'd go thermostat

[Silver_Fox]

Can't say I've ever heard the fan kick in

[Itchy]

[Vincent]

Have you googled what the "norm" is? Most bikes I've had have been in th middle or just below.

I'd check wiring first, (always start with the cheapest option), then the sender, then the gauge.
Has the bike been in a front-end prang do you know? Sudden impact can damage clocks .........even if they don't get trashed.
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Space Is Deep

[FlightRisk]

My 500 behaves just like that. Probably just a Honda thing.
I've only ever heard the fan kick in once on a hot day, gauge only comes up sitting in a queue of traffic after a blast.

If you leave it standing idling for 5-10 minutes it'll start to heat up. Bet the fan comes on eventually.
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Honda CB500S

[Silver_Fox]

The fact the gauge will rise if I'm stopped for some time in warm conditions led me to believe it was just a worn thermostat taking an age to move
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CBR600 F3 FV
CG125

[arry]

[monkeybiker]

[Silver_Fox]

I had the same problem on my Golf and that was exactly what it was, I assumed it was the same principle on the bike.

Can you get genuine Honda parts still or is it pattern only?
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CBR600 F3 FV
CG125

[ADSrox0r]

Usually the thermostat stuck. Have a look at your fuel consumption figures, if they're shit compared to the 'norm' then that's your culprit.
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Current bikes: '08 VFR 800 VTEC(yo) , '07 ZZR1400 Winter hack: '95 Aprilia 650 Pegaso Currently lusting after: RC30

[Vincent]

https://i77.photobucket.com/albums/j71/Drewskovitch/Jap%2070s%20bike%20toys/Bike%20toys/engine_thermostat_simple_test_zpsp1htew8h.jpg

Although, iof it's stuck open, it should be obvious.
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Space Is Deep

[Silver_Fox]

[Vincent]

How do they stick open anyway? I can see how they might leak but they're spring loaded, what holds them open? (gen Q)
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Space Is Deep

[Polarbear]

[Silver_Fox]

I guess I'll have to let it run stationary until it heats up and see if the fan does actually come in. I can't remember ever having heard it
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CBR600 F3 FV
CG125

[Vincent]

I've had bikes where the fans never come on until in heavy traffic in the middle of a heat wave.
I'm guessing your temp gauge is'nt working. Even if the stat was stuck open, it'd still warm up after a while. When the thermostat is working right, as the engine runs, the temperature rises up to running temp then you see the gauge drop as the stat opens and lets water/coolant into the cylinder block.
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Space Is Deep

[Silver_Fox]

I've only seen the gauge rise more than 10% twice in 6 months of ownership
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CBR600 F3 FV
CG125

[Pete.]

The reason why most temperature gauges read dead on middle when warmed up is because the gauge doesn't read linear to the coolant temperature. It's not like a fuel gauge where the needle corresponds to the level(ish) - on a temperature gauge it gets to middle just before full running temp then stays there for the next so many degrees (guessing 20-ish). After that it starts rising again.

This is also why you can 'suddenly' overheat after everything has been apparently normal - the temperature HAS been rising but the gauge hasn't registered it until it starts to overheat badly.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[talkToTheHat]

You do have coolant in the places where you should have coolant?
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Bandit. does. everything.

[Silver_Fox]

Aye, and new coolant at that. No leaks. Shirley it would overheat if the coolant was low anyway, and it's doing the polar opposite
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CBR600 F3 FV
CG125

[arry]

[andym]

My f2 will usually get up to around half way quickly, then creep up towards 3/4 while stationary, when it starts to go above that the fan will kick in..... which is very obvious when stationary, not so much when riding anything above walking pace