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CBR 600F4 1999 - 2000 Honda CBR 600F4 Forum

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Old 11-11-2017, 08:25 AM
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Default Initial warm up

My 2000 CBR F4 seems slow to warm up. After a few miles it runs OK. Using the choke makes no difference. It spoils a brilliant bike.
The bike has had a full service and the carbs removed and cleaned (pilot jets blocked).

Can anyone suggest a reason or cure. Many thanks.
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Old 11-11-2017, 09:28 AM
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Old 11-11-2017, 09:51 AM
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Thermostat stuck open?Check (feel) the top hose of the radiator against the bottom hose of the radiator, if they get warm at the same time

Last edited by CaBaRet; 11-11-2017 at 09:57 AM.
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Old 11-12-2017, 11:02 AM
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Thanks for this it is an excellent idea. I will check as soon as it stops raining!!
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