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Old 07-25-2014, 11:54 AM   #1
j0nathan
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Removing stv butterflies

Has anyone done this on a k4 gsxr 750, I'm thinking about doing it till I get my stva fixed, when I try to go full throttle it bogs down and loses power, and won't go, I want to try this but don't want to do it if it'll damage my bike
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Old 07-25-2014, 11:57 AM   #2
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i just glued the stv motor to keep the butterflies open and runs just fine.
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Old 07-25-2014, 12:17 PM   #3
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Have fun with cold starts and no low end power
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Old 07-25-2014, 12:35 PM   #4
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i never had a problem with either
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Old 07-25-2014, 01:45 PM   #5
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see these threads. this help?

http://www.motohouston.com/forums/sh...rvo+motor+gsxr

http://www.gsxr.com/showthread.php?t=26023
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Old 07-28-2014, 10:03 AM   #6
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They're not very restrictive so your best bet is to just wire them open.

Having to epoxy the holes when removing is a huge PITA.
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Old 07-30-2014, 02:08 PM   #7
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Well I've decided to try and just get the stva repaired, so if I remove the stva how do I go about opening the butterflies to about 75% and keeping them open? Will they just stay there or is there a something I need to do to keep them open?
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Old 08-05-2014, 10:16 PM   #8
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ya i had the same problem on gsxr 600 it throws a c28 code fixed it now it runs good
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Old 08-05-2014, 10:52 PM   #9
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I can remove them. Takes 20min after the main parts are off. Price=free.
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Old 08-06-2014, 11:58 AM   #10
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Quote:
Originally Posted by j0nathan View Post
Well I've decided to try and just get the stva repaired, so if I remove the stva how do I go about opening the butterflies to about 75% and keeping them open? Will they just stay there or is there a something I need to do to keep them open?

If you just push them open with the atuator disconnected from power they'll likely stay that way. They're not spring loaded to close. I have seen on a few race bikes where someone has drilled a tiny hole in the arm on the right side, and safety wired it to something solid so it can't possibly move. Note: with actuator disconnected the bike will set a code, but will run normally.
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Old 08-06-2014, 12:42 PM   #11
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Quote:
Originally Posted by Chubby Racer View Post
If you just push them open with the atuator disconnected from power they'll likely stay that way. They're not spring loaded to close. I have seen on a few race bikes where someone has drilled a tiny hole in the arm on the right side, and safety wired it to something solid so it can't possibly move. Note: with actuator disconnected the bike will set a code, but will run normally.
this, Romeo did it for me in between sessions a few years back at TWS (Texas World Speedway)...threw a code, but ran a-ok....slightly higher idle I think and hard to start when super cold outside.
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