HELP!!!...Fuel Delivery Problem - Honda RC51 Forum : RC51 Motorcycle Forums
 
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post #1 of 9 (permalink) Old 03-29-2011, 02:30 PM Thread Starter
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HELP!!!...Fuel Delivery Problem

Hello All!

I'm fairly new to the v-twin world, but have been on inline fours for the past six years. I was lucky enough to get my hands on a 2006 RC51 this past winter for a steal, so I couldn't pass it up. I had to jump through some hoops to get a clean title on it, but after it was all paid off by previous owner, I've not got a clean title in my hands. Now for the problem...

I had it all torn down this winter to change oil, check fluids, rewire the hack-job in the rear tail and just a general clean up. We got it all buttoned back up and I took it out to ride, and ran into some serious problems.

The bike had been giving us a really hard time starting. The battery had plenty of juice and was cranking the engine plenty quick to turn over, but it almost seemed like it was starving out from no fuel delivery. The fuel pump primes properly, from what we can tell. Upon getting the bike started, I took it out to run it down the road a few miles and make sure it was good to go. As I was heading up through the RPMs, the bike seemed to hit a wall around 5000 RPM and just stumble and die out under hard acceleration. The bike never actually died, and ran perfectly smooth down under 5k RPM. Once it was pushed hard and I attempted to go back above about 4.5-5k RPM, it continued to stumble and would not pull at all. I've checked the PCIII and it holds a map and functions properly, so feel we've eliminated that from the list. I'm wondering if it's a bad fuel pump??? Also, the bike pretty much sat for around two years prior to be purchasing it from the guy, which also makes me think fuel pump.

If anyone out there has ANY suggestions, I would GREATLY appreciate any help whatsoever. I'm sort of at a loss, and really want to avoid taking it into a dealership in order to do work we can do on our own. Also, didn't want to blow a huge chunk of money on a new pump if that wasn't the issue as well. Hopefully someone has some input/suggestions on this issue. Thanks in advance!

-Russell
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post #2 of 9 (permalink) Old 03-29-2011, 03:43 PM
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Fuel pressure regulator maybe? Easier and cheaper to replace than the fuel pump. Search the site, I'm pretty sure there's a recent thread or two on someone with similar issues. Also, you might know your way around a bike, but the shop repair manual specific to your bike can save alot of aggravation. At least it has with me. Good luck and don't let this small prob discourage you. Once she's runnin right you won't be able to stop grinnin

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post #3 of 9 (permalink) Old 03-29-2011, 07:00 PM
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FUEL PRESSURE REGULATER $50 from honda and is an issue with these

2000 RC51
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post #4 of 9 (permalink) Old 03-29-2011, 07:01 PM
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You'll get a lot of votes for fuel pressure regulator. That's a common honda thing. You're best bet is to refer to the service manual, or just bite the $40 -50, and replace the reg. Good chance that'll work. I couldn't find any OEMs online, think it's a stealership only item.

http://www.rc51.info/index.php?page=service for the service manual.

Check out Fuel System. In the US version, go to 5-50 for pressure and flow/volume specs.

John, 2000 RC51 #000100

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post #5 of 9 (permalink) Old 03-29-2011, 07:07 PM
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Check your tank too for black particles....the impellers in the fuel pumps also go from time to time...



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post #6 of 9 (permalink) Old 03-30-2011, 03:07 PM
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Run your bike with the power commander unplugged, just because it looks like its working does not mean that it is.
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post #7 of 9 (permalink) Old 03-30-2011, 10:39 PM
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Quote:
Originally Posted by jondog9 View Post
You'll get a lot of votes for fuel pressure regulator. That's a common honda thing. You're best bet is to refer to the service manual, or just bite the $40 -50, and replace the reg. Good chance that'll work. I couldn't find any OEMs online, think it's a stealership only item.

http://www.rc51.info/index.php?page=service for the service manual.

Check out Fuel System. In the US version, go to 5-50 for pressure and flow/volume specs.
http://www.ronayers.com/ProductDetails/N/687/SKU/260536

Ron Ayers is my go to place.

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post #8 of 9 (permalink) Old 03-31-2011, 04:29 AM
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Also check the fuel filter ;gordo
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post #9 of 9 (permalink) Old 04-04-2011, 10:26 AM Thread Starter
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Hey guys - Thanks a lot for all the help and suggestions thus far. The PCIII has been unhooked and the bike continued to run the same (stumbling at higher RPMs). Also, the inside of the tank is spotless and we haven't noticed any particles whatsoever in there. We ran some injector cleaner through the bike, and it continues to show signs of improvement. The weather keeps getting nicer and nicer, so we've' continued to just take the bike out and run it for 20-30 miles. We're going to do that for another few days and see if it still may work the kinks out. If not, we'll probably move on to changing both the fuel filter as well as the fuel pressure regulator. Thanks again for the help and I'll make sure to keep checking back in.

-Russell
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