'03 RC51 hesitation - Sportbike Forum: Sportbike Motorcycle Forums
 
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post #1 of 9 (permalink) Old 07-25-2005, 03:06 PM Thread Starter
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'03 RC51 hesitation

I have an 03 RC51 with Yoshi slip-ons, a powercomander, and K&N's. I have a miss/ studder from 4700-5200rpm. Its most noticeable around 70mph. It feels as though the bike is running out of gas. The bike now has 7000 miles on it. I thought it seemed to early to need a fuel filter ($60 @ dealer) or plugs. I was looking for some advise before I throw money at it. It has been doing this since before the K&N's so it's probably not too rich, maybe a lean condition? Anybody have a fuel map for the Powercomander with this combo?
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post #2 of 9 (permalink) Old 07-26-2005, 12:19 PM
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First off have you done the flapper mod?

Second throw the K&N's away & put the OEM filters back in...

& finally what Powercommander version are you running?
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post #3 of 9 (permalink) Old 07-26-2005, 01:25 PM Thread Starter
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Thanks for the reply:

PowerCommander IIIr

No I have not done the flapper mod

What is wrong with the K&N's? Airflow? Quality? It was doing this before they were installed so I didn't think that they were the problem.
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post #4 of 9 (permalink) Old 07-27-2005, 06:11 AM
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They are most likely not the problem but they suck nonetheless

Ask around to any knowledgable RC51 community & you will get the same response.

I also have a write up on the topic of aftermarket filters on my RC51 site

www.rc51.org/airfilt.htm


Do the flapper mod & load the Sato high mount map from my site into your powercommander then let me know if you are still experiencing the problem
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post #5 of 9 (permalink) Old 08-13-2005, 08:16 AM Thread Starter
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Thanks for the help. I did the flapper mod, removed the K&N's, and loaded the map you recommended. The bike ran great! I made the 1000 miles to Denver for my saddle sore ride without a problem. What a ride 18 1/2 hours there, and 14 1/2 hours home (with a little short-cut). Now I need a new rear tire!
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post #6 of 9 (permalink) Old 08-15-2005, 06:53 AM
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glad to hear it all got sorted

Cheers
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post #7 of 9 (permalink) Old 08-15-2005, 01:10 PM
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So the tip is when LDH answers your question then do as he says & remember he does NOT favour K&N filters yet they seem to be one of the first things others seem to put on NOT realizing the draw-back of using them.

Remember all the others on the road are crazy & out to kill you.
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post #8 of 9 (permalink) Old 08-16-2005, 02:01 PM Thread Starter
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If only I could get my money back. Oh well, at least I got them cheap.
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post #9 of 9 (permalink) Old 08-17-2005, 06:22 AM
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ahhh screw that... it's only money you can get more of that.

The important thing is that yer bike is running properly which is guaranteed to bring a smile to your face!
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