Throttle Body Secondary Plates - Kawasaki Vulcan Forum : Vulcan Forums
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post #1 of 14 (permalink) Old 11-30-2012, 11:44 AM Thread Starter
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Throttle Body Secondary Plates

I didn't want to hijack the previous thread regarding the air intake mods, so I decided to to a separate thread.

It was mentioned about removing the secondary throttle body plates (butterflies) to improve performance and engine response. My question is, what else do you need to do after removing those plates? FI box, different intake, etc.? And after removing those plates, besides improved engine response, does it smooth the engine out some at higher speeds and what does that do to your gas mileage.

Final question, what is the link to performing this mod?

Thanx in advance.

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post #2 of 14 (permalink) Old 11-30-2012, 01:40 PM
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You dont have to do any other mods. The only difference i noticed was "snappier" throttle response.

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post #3 of 14 (permalink) Old 11-30-2012, 01:42 PM
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Here you go.... link to the mod

Throttle Plate Mod

Page 7 has pics of the mod. It's a very easy mod, takes just a few minutes. Just take your time removing the screws.

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post #4 of 14 (permalink) Old 11-30-2012, 06:09 PM
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Quote:
Originally Posted by Strompilot View Post
I didn't want to hijack the previous thread regarding the air intake mods, so I decided to to a separate thread.

It was mentioned about removing the secondary throttle body plates (butterflies) to improve performance and engine response. My question is, what else do you need to do after removing those plates? FI box, different intake, etc.? And after removing those plates, besides improved engine response, does it smooth the engine out some at higher speeds and what does that do to your gas mileage.

Final question, what is the link to performing this mod?

Thanx in advance.
I found that after removing the plates the bike would go flat for a moment when I cranked open the throttle. I figured this was due to the inrush of air and an ECU that still thinks the secondary plates are still there. I added fuel to that area (RPM & throttle position) and the problem went away. In my case removing the plates was in conjunction with adding aftermarket pipes, air kit and a PCV.
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post #5 of 14 (permalink) Old 12-01-2012, 09:39 AM Thread Starter
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I accessed the link, and it looks like a pretty straightforward, simple job. If I don't like the result, I hope it's just as easy to reverse the procedure and put the plates back in. But I won't do any of that until next Spring, so I"ve got lots of time.

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post #6 of 14 (permalink) Old 12-01-2012, 09:40 AM Thread Starter
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I added fuel to that area (RPM & throttle position) and the problem went away. In my case removing the plates was in conjunction with adding aftermarket pipes, air kit and a PCV.
I'm not sure what you mean by this--adding fuel to that area. Could you explain?

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post #7 of 14 (permalink) Old 12-01-2012, 10:53 AM
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I'm not sure what you mean by this--adding fuel to that area. Could you explain?
The Power Commander lets you add or subtract fuel in individual cells laid out as a grid from zero throttle to 100% throttle, from idle up to redline. It felt like the bike was flat when I would go to 50% throttle at a relatively low to mid RPM. Adding fuel to the cells in that area of the grid took the problem away. Since then I've added the Autotune module which automatically adds or subtracts fuel based on what the O2 sensor is telling it. The problem hasn't returned.
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post #8 of 14 (permalink) Old 12-01-2012, 04:51 PM
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+ 1 on the snappier throttle from this mod. My understanding is that the restrictors make the airflow less prone to big changes caused by bumps in the road, etc giving you smoother overall throttle feel. Course lots of us don't want it smoothed out we want the throttle to crack when we hit it. It's an easy mod that's easily put bak if you don't like it.
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post #9 of 14 (permalink) Old 12-01-2012, 04:53 PM
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And also, i did have to add fuel to my v&h fuelpak at the 3500 rpm range. Works like a top now.


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post #10 of 14 (permalink) Old 12-01-2012, 04:59 PM
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Did same on my v2k. Nothing else required. Just better throttle response.(read spins rear tire)

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