2000 SP1 Hot idling problem - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 3 (permalink) Old 10-06-2013, 08:20 AM Thread Starter
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2000 SP1 Hot idling problem

Hi, I hope this is appropriate to post here.
I am having problem with idling when hot.
When its cold, it runs no problem, but after warm up, it just dies.
Runs okay but every time I stop, and RPM goes down, then it dies.

I suspected the clogged injectors and used a cleaner but did not make difference.

I have PCIII and Yamamoto 2:1 system on.

Any suggestions what to look for?

thanks

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post #2 of 3 (permalink) Old 10-06-2013, 01:32 PM
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My first guess is the fuel pressure regulator.
Has the bike been sitting for a little while?
The fpr's are a common failure.
You can test them, but occasionally they appear to pass the test and they still cause problems. Like your's.
Lift the tank, pull the small vacuum hose off the fpr, then turn your key on to prime the fuel pump. watch for leaking gas from that small nipple for the vacuum line you just pulled.
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John, 2000 RC51 #000100

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post #3 of 3 (permalink) Old 10-06-2013, 02:03 PM
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Its worth changing tge fpr regardless of the problem. Mine seemed like a electrical problem and disappeared when I changed the fpr

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