Low speed engine surge - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 11 (permalink) Old 04-26-2015, 09:31 PM Thread Starter
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Low speed engine surge

I've just recently purchased a 2005 rc51 and when cruising through the neighborhood at low speeds in first gear my bike surges and does a bucking number on me, any idea of what this might be? Thanks
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post #2 of 11 (permalink) Old 04-26-2015, 10:37 PM
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post #3 of 11 (permalink) Old 04-27-2015, 12:51 PM
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If you don't have a Power Commander buy. If you have one get it tuned. If you still have problems change the gearing to increase engine rpm fro the range that is causing the problem. I had the same problem going through school zones in first. Tuning really helped but most of the time I just pull the clutch in a coast. This is not a bike that is great in traffic unless you change the gearing.
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post #4 of 11 (permalink) Old 04-27-2015, 12:53 PM Thread Starter
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It has different sprockets on it the previous owner added. It doesn't have a power commander
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post #5 of 11 (permalink) Old 04-27-2015, 01:08 PM
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Surging is a typical thing for these early FI bikes. Anything under 3000 rpm especially in first gear is pretty snatchy. Power Commander and a proper tune will help.
Do you have aftermarket exhaust system?
Is you chain slack set at the proper 25 to 30mm?
How do the teeth on your sprockets look?

John, 2000 RC51 #000100

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post #6 of 11 (permalink) Old 04-27-2015, 07:09 PM Thread Starter
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I have fmf exhaust and the teeth look fine
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post #7 of 11 (permalink) Old 04-28-2015, 11:24 AM
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That is the result of a heavy flywheel on a large displacement V-Twin

Quit riding around at low rpms and the problem will resolve itself
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post #8 of 11 (permalink) Old 04-28-2015, 01:09 PM Thread Starter
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Being a marine and living in on base housing it's kinda hard when the speed limit is 15 mph...
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post #9 of 11 (permalink) Old 04-28-2015, 02:24 PM
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Life is pretty hard all around isn't it
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post #10 of 11 (permalink) Old 04-28-2015, 06:26 PM
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Mine has no PC and stock exhausts. That lurching is just the nature of the beast. Just gotta figure out that right gear and rpm when rolling slow and you don't wanna be loud about it. I have noticed like Jondog said, when my chain gets slack it happens a lot more. Also causes lurchy shifting at normal around town speeds. Good luck.

Colt
00 RC51 #1119
97 CBR F3
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