intake noise/flapper mod - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 23 (permalink) Old 06-08-2009, 07:33 AM Thread Starter
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intake noise/flapper mod

supposedly the factory installs the flapper valve to reduce intake noise and get by noise emmision laws. WHAT NOISE? i did the mod and can't hear any difference.
comments anyone?
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post #2 of 23 (permalink) Old 06-08-2009, 10:27 AM
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The flapper had nothing to do with emissions, only intake noise to get the bike by noise regs.
Mine was already removed when I bought mine, so I can't compare.
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post #3 of 23 (permalink) Old 06-08-2009, 10:56 AM Thread Starter
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i don't hear any noise that should require any extra attention like a flapper valve.

i don't get it.
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post #4 of 23 (permalink) Old 06-08-2009, 07:07 PM
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Originally Posted by finepooch View Post
i don't hear any noise that should require any extra attention like a flapper valve.

i don't get it.
Just another one of life's mysteries.
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post #5 of 23 (permalink) Old 06-08-2009, 07:34 PM
 
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Well, I've ridin with and without the flapper. You notice more noise around the 5-6.5 k rpms.
I think it sounds cool!
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post #6 of 23 (permalink) Old 06-08-2009, 07:52 PM Thread Starter
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i'll listen for some more.
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post #7 of 23 (permalink) Old 06-08-2009, 08:32 PM
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Well, I've ridin with and without the flapper. You notice more noise around the 5-6.5 k rpms.
I think it sounds cool!
I agree. I could care less that many bikes today are faster.
I just wave and keep listening to my engine in stereo.

One guy asked what that whining sound was (cam gears).
I told him it was the sound of reliability.
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post #8 of 23 (permalink) Old 06-08-2009, 08:53 PM
 
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This past Sunday Me and a Bud went out riding. he rides a new zx10. I wanted to see what the 51 could do along side it. So, we did rolling start 1st gear 30mph take offs. I was amazed that the 51 could hang with that bad boy zx10. Well at least untill midway into 3rd gear, then the ninja started pullin. BUT I could get him out of the corners! So I was happy! Take that ninja! lol
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post #9 of 23 (permalink) Old 06-08-2009, 08:55 PM
 
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Also figured how 2 snap my right hand to make the 51 look at the sky in 1st... I love that feeling. Wish someone had a vid cam while we did the roll on. seeing the rc and the ninja go up on one. Would have been a good sight!
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post #10 of 23 (permalink) Old 06-09-2009, 01:40 PM Thread Starter
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i hate "NINJAS"

"my dad has a NINJA and it's the fastest bike!"
"sure kid"

i would not trade my rc51 for 50 "NINJAS"

i am surprised to hear your rc51 kept up at all. i got spanked by a 1997 cbr900 on sunday. and i'm geared lower(-1 front)!!!
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