First set of butterfly plates in throttle body - Kawasaki ZX-10R.net
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post #1 of 13 Old 06-10-2007, 12:49 AM Thread Starter
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First set of butterfly plates in throttle body

Can any one tell me what the first set of butterfly valves are for in the throttle body. When you look through the factory velocity stacks, you can see them they are the aluminum ones. Wasn't sure if the surved a purpose other than restricting air flow. But now that i think of it maybe they are used to maintain vacuum through out the motor. Any way any help would be nice. The bike is an 06 10R.
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post #2 of 13 Old 06-10-2007, 02:41 AM
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They are there to smooth transitions in power application and to aid torque at lower RPM's.
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post #3 of 13 Old 06-10-2007, 04:48 AM
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Has anyone removed the secondaries in their zx10r as they do in the zx14?
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post #4 of 13 Old 06-10-2007, 06:31 AM
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try searching young grasshopper, there was a thread couple days ago, pretty informative.

http://i117.photobucket.com/albums/o45/josh10r/IMG_0144-1-1-1.jpg
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post #5 of 13 Old 06-10-2007, 07:20 AM
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Yes, I have them removed, you will need the accelerator pump turned up to account for the extra hit of air right at throttle snap, or it will lean surge. Otherwise its 50/50 in what you want out of it, it does help top end a little bit.
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post #6 of 13 Old 06-10-2007, 11:19 AM Thread Starter
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butterflies

well i removed them yesterday and i also disconnected the servo motor and punched the cats. bike definatly has a different sound to it. its kinda funny though. it seems to bog a little in really low rpm but it lifts the front end easier. i haven't brought it up in the higher rpms to if it effected it or not but the throttle is definatly smoother. i just figured that they restricted the airflow going in to the motor. they were pretty easy to remove once the airbox was taken out. putting a power commander, pipes, k&n, and velocity stacks tommorow, and i think the combination of everything will be very positive.. will keep every one posted on the outcome.
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post #7 of 13 Old 06-10-2007, 11:36 AM
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You should remap if you pull the flies. You are too lean in the midrange.
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post #8 of 13 Old 06-10-2007, 08:46 PM
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yeah you defintly want to retune the bike.....I did the same mod back to back runs on the dyno and i got no increase of power except the very peak rpm but it was a 5hp increase!!!! I have dyno sheets posted up here somewhere.
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post #9 of 13 Old 06-10-2007, 10:24 PM
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Your Damn Right!!!!!!!!!!!!!!!!!!!!
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post #10 of 13 Old 06-13-2007, 04:13 AM
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Thanks for the replys guys, like I said I'd heard alot about people doing the mod to the zx14,but they are definately weaker off the bottom than the zx10r.I rode them back to back last month,and the 10 felt like an animal after hopping off the zx14.
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