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Interesting Some kakfa....

andyBeaker

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Good luck to him..my Fi really struggled in very hot weather and rush hour London traffic. But I don’t think it had anything to do with the thermostat opening temperature And I don’t think there was anything wrong with the bike.

I often though about giving Evans Waterless coolant a go but never got round to it.
 

sr71caspar

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Good luck to him..my Fi really struggled in very hot weather and rush hour London traffic. But I don’t think it had anything to do with the thermostat opening temperature And I don’t think there was anything wrong with the bike.

I often though about giving Evans Waterless coolant a go but never got round to it.

I don't see how a thermostat opening 4°c earlier will affect 100°c normal running temperature.

He should be designing a bigger cored radiator, to address any perceived over-heating issue.
 

andyBeaker

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Somebody else trying to solve a problem that doesn't exist.
It existed for me! Had to stop and let the bike cool down occasionally In really hot weather in heavy traffic.

Temperature quickly dropped when it hit the open road.
 

sr71caspar

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It existed for me! Had to stop and let the bike cool down occasionally In really hot weather in heavy traffic.

Temperature quickly dropped when it hit the open road.
Yes, but that is nothing to do with the thermostat opening temperature!
 

Oldandbald

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Nope. Any old thermostat will do. I improved mine by flushing the cooling system and putting in fresh coolant. Simple stuff first. He doesn't appear to have considered that.
 

sr71caspar

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See post 2
Why did you change your mind?

Post #2 it's not the thermostat.
Post #4 someone's solving a problem with the thermostat that isn't there.
Post #5 It existed for me, I had to stop and let it cool down.


:nusenuse:
 

DEG5Y

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The opening temp is purely to aid cold starting to allow the engine to reach running temp sooner.
Nothing to do with final running temp.
 

andyBeaker

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Why did you change your mind?

Post #2 it's not the thermostat.
Post #4 someone's solving a problem with the thermostat that isn't there.
Post #5 It existed for me, I had to stop and let it cool down.


:nusenuse:
If you concentrate really, really hard you may spot that post 4 isn’t me.

Sorry to disappoint.
 

Centaur

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The opening temp is purely to aid cold starting to allow the engine to reach running temp sooner.
Nothing to do with final running temp.
It is a common misconception that once the thermostat opens it's job is done. Watercooled engines have much tighter tolerances than aircooled engines and the thermostat's job is to keep the engine within a tightish temparature band so if the engine temperature drops the thermostat will close to bring the temparature up to stay within the required band. .
 

andyBeaker

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Some won’t like it but I wouldn’t recommend the fi for commuting into and out of London/big city/heavy traffic.. I would hazard a guess that my seemingly endless charging circuit problems were down to the ultra hot running, both the heat itself and the fan working hard but not coming close to doing the job in really hot weather. Blooming hot on the legs as well.

The carb was fine by the way!!
 

sr71caspar

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If you concentrate really, really hard you may spot that post 4 isn’t me.

Sorry to disappoint.
If you concentrate even harderer, you will see that post #5 was in answer to Post #4- which I put in for context.

Yes, you are disappointing.

Now, answer the question "why did you change your mind?"
 

Artemis

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If you concentrate even harderer, you will see that post #5 was in answer to Post #4- which I put in for context.

Yes, you are disappointing.

Now, answer the question "why did you change your mind?"
Now, now boys, play nicely
 

JayTee

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Some won’t like it but I wouldn’t recommend the fi for commuting into and out of London/big city/heavy traffic.. I would hazard a guess that my seemingly endless charging circuit problems were down to the ultra hot running, both the heat itself and the fan working hard but not coming close to doing the job in really hot weather. Blooming hot on the legs as well.

The carb was fine by the way!!
Interestingly I noticed on the trip we had last week over to Belgium in the congestion around the M25 the traffic wasn’t moving much and the amount of heavy goods made filtering very slow, my fi ran hot with the fan on a lot of the time, the little 12 volt meter on the dash dropped dramatically down to below 12 volts only getting back to normal after a good run and the engine cooling down. This was repeated every time the situation occurred.
Can only put this down to excess heat causing resistance in the system and causing a downward spiral.
Didn’t know the carby rads were bigger.
 

Centaur

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I think it is likely that the slow speed meant the alternator wasn't turning fast enough consistently to match the load on the system. Did you turn lights and all electrical loads off to help the system? I can't see how an increased temperature would affect the alternator output. The continuous running of the fan would be putting a load on the system it wasn't designed to cope with.
 

andyBeaker

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I think it is likely that the slow speed meant the alternator wasn't turning fast enough consistently to match the load on the system. Did you turn lights and all electrical loads off to help the system? I can't see how an increased temperature would affect the alternator output. The continuous running of the fan would be putting a load on the system it wasn't designed to cope with.
The increased heat maybe affects the reg/rec which is probably already pretty hot…systemic failure
 
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