Question about 1994 Triumph Daytona 1200

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Rapid overheating engine gets very hot at low speeds even on the coldest of days ,fan works ok , coolant ciculates freely ,correct plugs fitted ,eventually gets so hot that engine misfires and stalls at traffic lights !!? . what should i be looking at to cure this ,please .

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Hi
The fan should come on when the light comes on, if not check that the switch wires are good & that there is continuity between it the light & the fan
There could be a pocket of air in the cooling system, squeeze the tubes from the radiator to dislodge it
There is a product called a water wetter (probably some sort of detergent) that helps to alleviate hot spots in the engine - Apparently it works well !!

Here's a to some on Ebay ;-)
Triumph-Redline-Water-Wetter-Super-Coolant

Ride Safe
Bike-Doc

Posted on May 14, 2010

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The fan is thermostatically controlled and the coolant temperature needs to reach the upper level before it will "kick in". Surprisingly as long as the motorcycle is moving forward specially on a fairing type motorcycle the head is dispersed rapidly by the air moving over the radiator fins.
If you were in stop and go traffic with extended idle times then yes the fan will or should kick in.

Both my Goldwings had temperature gauges and were full fairing motorcycles sitting in rush hour traffic I could watch the gauge climb at a traffic light and steadily drop off even at 25mph.

What you may be feeling is the heat rolling out from under the fairing to the rear of the engine which on a hot day and low speeds is enough to feel as if both you and the motorcycle are overheating.

What I've done with my 750 Magna is roll into my drive (on a hot day after being in traffic) leave the ignition on and hit the kill switch, maybe a minute later the fan will kick in for about 40 seconds and shuts off. Just my way of checking.

Another thing on the Fireblade you might not hear the fan over the "normal" engine sound these fans are quiet and that's one reason I did the kill switch shut off so I could hear the fan.

Also the coolant used in a motorcycle is much more efficient then any automotive type and should never be substituted for any automotive type.

Cheers be safe and enjoy your motorcycle

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Some more info would be helpfull, but i'll try to give some help.

firstly, is the fan clutch working? it;ll look as though it is, and still spin the fan, but if you stand near the engine with the engine running and hood open and don't feel a force of air blowing out of the engine bay then the fan clutch could be weak. A way to test this is to very carefully and slowly try to stop the fan turning using a broom handle. if the fan clutch is working, then it;ll just kick the broom handle out of the way. you won't be able to stop it. If it isn't working, you'll be able to continue to place the broom handle and the fan will stop turning. as simple as that. If the fan clutch is faulty, you're engine will overheat. Especially at stop lights, parked with the engine running, and it'll kick out your coolant when you turn the engine off after it's hot.

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