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post #1 of 24 (permalink) Old 08-17-2011, 09:45 PM Thread Starter
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Need help?!

Ok so here goes....i hope someone out there can respond quickly.....I need help with a buying decision.....I am looking to buy an 03 rc51 and have test rode it. Well here are my questions...first off I rode my 2002 R6 over there to test ride this 03 and when i was test riding it I didnt feel the "pull" that I was expecting? The speedo was saying different but I was expecting this thing to set me back. it almost seems as if my 6 could keep up. secondly this RC has a set of yoshi pipes and a power commander 3. It sounds great and looks the part but I just wasnt feeling the power that I expected but I have never ridden a twin before so maybe thats just the way it's supposed to run? Or maybe the power commander needs adjusted? btw the clutch didnt seem to slip at all. Please help!
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post #2 of 24 (permalink) Old 08-17-2011, 09:50 PM Thread Starter
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I also have another question that maybe someone could answer? I have been researching the RC for awhile now and read about the "flapper" valve and the rev limiter removal....I was wondering if these are nessasary?
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post #3 of 24 (permalink) Old 08-17-2011, 09:52 PM Thread Starter
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This 03 starts easily and seems to run just fine revs good and all that just doesnt seem to "pull" that hard? Maybe a set of sprockets would help? I also read that the sprockets will help with that low idle stalling lol
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post #4 of 24 (permalink) Old 08-17-2011, 09:53 PM
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Can't say....how many miles? Did you pull the side covers? Did you check the oil color?? Did you check the coolant condition??? Did the engine sound correct????

Chain/sprocket condition etc.....could be a number of things.

Yes, the RC should pull harder than your R6....the butt dyno never lies.


Flapper removal just helps to let the engine breathe better and helps performance with a proper map. (Its real purpose is noise emission control)

Rev limiter mod just removes the soft rev limit.

Neither are necessary....but the flapper mod does help with the dead spot in the low/mid range.


www.rc51.org helps with this



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Last edited by madbuyer; 08-17-2011 at 09:57 PM.
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post #5 of 24 (permalink) Old 08-17-2011, 09:56 PM Thread Starter
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no i didnt check the oil or coolant condition and the milage is 13900
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post #6 of 24 (permalink) Old 08-17-2011, 09:59 PM
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What was the bike not doing that you were expecting?
BTW 14K miles isn't even to the first valve clearance check.

If it has stock final gearing, that may be one problem.
It was quite tall from the factory.

The most popular option is to change the final ratio to usually 15F/41R or 42R.
Lowers the top end a little, but really helps launching off the line.

The engine is plenty torquey at 4000 and builds starting at 5000.
The HP climbs pretty linear up to redline.
Overall the engine builds power smoothly without sudden rushes.

Last edited by SubSailor; 08-17-2011 at 10:12 PM.
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post #7 of 24 (permalink) Old 08-17-2011, 10:01 PM Thread Starter
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i figured that the thing would just pull like a banshee
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post #8 of 24 (permalink) Old 08-17-2011, 10:02 PM Thread Starter
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dont get me wrong it pulls but just not what I was expecting? would gearing help and would that help the low idle stalling lol
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post #9 of 24 (permalink) Old 08-17-2011, 10:03 PM Thread Starter
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i guess i was expecting alot more umph....maybe the clutch was slipping but it didnt seem to be
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post #10 of 24 (permalink) Old 08-17-2011, 10:04 PM
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Quote:
Originally Posted by slj029 View Post
no i didnt check the oil or coolant condition and the milage is 13900
I'd be checking the oil condition and pull the side covers and check for signs of leaks, over heating etc...thats relatively low mileage too



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