08 cbr slight throttle surge at around 3k rpm **servo motor opens the exhaust flapper - 600RR.net
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post #1 of 7 (permalink) Old 10-06-2010, 08:08 PM Thread Starter
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08 cbr slight throttle surge at around 3k rpm **servo motor opens the exhaust flapper

I'm steady on the throttle but around 3k I get a little extra surge.
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post #2 of 7 (permalink) Old 10-06-2010, 08:09 PM
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any modifications? slip on/power commander?
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post #3 of 7 (permalink) Old 10-06-2010, 08:33 PM
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If you look at the stock dyno chart, you can see that from 2500 - 3500 rpm the torque output is increased by 25 - 30%. So that's why you're noticing a surge... The engine is actually able to do 25% more work when it gets to that rpm. Just because you are constant on the throttle doesn't necessarily mean that the engine will behave in a linear/consistent manner.

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post #4 of 7 (permalink) Old 10-07-2010, 01:57 AM
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I get a healthy boost at 4,500. Bike seems to wake up.

2009 CBR600RR ABS (helibars + touring screen + Corbin Saddle = Sport Tourer!)
2011 Ducati 848EVO
2008 KLR650

Last edited by The Savage Rabbit; 10-07-2010 at 02:03 AM.
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post #5 of 7 (permalink) Old 10-07-2010, 02:00 AM
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Mine doesnt hit until about 8-9k... then look out!

2009 Black Honda CBR600RR pimping over 1,500 miles every month since 6/15/2010!

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post #6 of 7 (permalink) Old 10-07-2010, 02:10 AM
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Mine did that too until I gutted the intake. Now it's completely smooth and gets on the power from idle.

Last edited by D Money $$$; 10-07-2010 at 02:14 AM.
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post #7 of 7 (permalink) Old 10-07-2010, 02:10 AM
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It's normal for a slight surge at 3,000RPM. The servo motor opens the exhaust flapper there.
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