Remove Secondaries ? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 43 Old 04-17-2005, 10:40 PM Thread Starter
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Remove Secondaries ?

If you spend anytime over on the other DL Forum or the Yahoo groups.
(I know, Why would you?)

You know several folks have removed their secondary Butterfly thingies.

Everyone claims "IT's GREAT"

Smoother, Snappier, Better.

Anyone here done it?

Discuss

04 DL-650
Have a good time, ALL the time !
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post #2 of 43 Old 04-18-2005, 06:17 PM
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Yep. I took mine out. Not a big job. I have a PCIII also. I didn't notice any difference at all. Its also supposed to remove the top speed limiter. I'll probably never find out the top speed of this bike anyway. Seems like if you have a Powercommander it doesn't make much difference from the posts I've seen. Maybe with no PCIII it helps. I left my secondaries out because I am too lazy to put them back in.
post #3 of 43 Old 04-18-2005, 07:02 PM
CDN_RN
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Step by step instructions for the mechanically challenged? :wink:
 
post #4 of 43 Old 04-19-2005, 11:18 AM
Velociraptor
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Remove the air filter. Look down each intake and you can see a round metal disk. Each disk is held in place by two small screws. Remove the screws-not too hard. DO NOT LET THE SCREWS DROP INTO THE INTAKE!!!. If you do that do not start the engine. You will have to get them out somehow. Otherwise they will be sucked into the combustion chamber or get stuck under an intake valve and do all manner of bad things. Once the screws are removed the metal disk will slide out. Do this for both intakes. That's it.
post #5 of 43 Old 04-19-2005, 07:55 PM
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Quote:
Originally Posted by Velociraptor
I have a PCIII also. I didn't notice any difference at all.
Yep. It seems to be the consensus that the 'Stroms that show the biggest difference are the more stock ones. Those with a Power Commander seem to see little to no difference. My engine was bone-stock until I removed the secondary butterflies. WOW!!! I could feel the difference within the first 10 yards! Throttle respoinse is snappier and smoother. Also, the mid-RPM "chudder" has almost (but not completely) disappeared. I also adjusted the throttle cables per the owner's manual when I did this mod. (Most Zuke dealers do a pretty crappy job of prepping the 'Strom for sale, IMO.)
post #6 of 43 Old 04-19-2005, 09:52 PM
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Those that have the PCIII USB, have you tried the 04/05 map available from the PC website? It is richer than any other stock map, (up to 33% in one place). I'm running this map with the accelerator pump upgrade and the secondaries removed. The pump upgrade makes a difference only if you have the secondaries removed. It shoots extra fuel when the throttle is snapped open (programmable), and is really needed if you don't have the secondary throttle plates to limit the airflow while the engine is catching up. It all goes back to the large Holley carbs we use to run on our cars. When the throttle is snapped open quickly, the engine vacume is lost momentarily until the rpms get high enough to produce the required vacume. So to overcome this loss of vacume, and the resulting loss of fuel/air mixture, the accelerator pump was born. Now, you can have the best of both worlds, with the large throttle body/fuel injection, (thanks Suzuki), minus the secondaries, and an accelerator pump.
However, I doubt if you could tell any difference with the secondaries intact though.
Try it, you'll like it. And it's free for the USB model only.
post #7 of 43 Old 04-26-2005, 10:37 AM
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PowerCommander-Love it, Love it, Love it!

Finally got a chance to ride the "Yellow Peril" (munged my knee, needed surgery, long story) after installing the PowerCommander back in December.
No more low speed engine shudder/chatter.
Goes LOTS faster.
Gets better gas mileage at "normal" speeds.
Whitens the smile, freshens the breath and drive women mad with desire.
OK, I made the last one up. Sorry.
This is a must buy addition to the bike.
The Vicar

2 Corinthians 4
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post #8 of 43 Old 04-26-2005, 12:49 PM
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Before I take everything apart to do this, I just want to make sure that the 650 has the secondary TB that the 1000 has and that it benefits from this removal.

All reviews of these benefits have come from 1000 owners. Any 650 owners who have also done this mod?
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post #9 of 43 Old 04-26-2005, 11:37 PM Thread Starter
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Hey Speedstar
yeah the 650 has the secondaries...

I keep looking for data on the 650 too, and if secondary removal is worth the trip.

I did see, on Yahoo "vstrom2" group.. they have a database of 13 people who did the mod and what was there impression

All 13 loved it, only one guy listed his bike as a DL 650.

I am still hunting... i'll let you know..

Funny thing... I keep looking on the SV 650 forums.. nobody is talking about it over there... SV has the secondaries as well...

So, Who knows I'll keep looking

:?:

04 DL-650
Have a good time, ALL the time !
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post #10 of 43 Old 04-27-2005, 10:47 AM
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Hey Chris, sounds like we are in the same boat. I will wait to see what you find out and If I come across anything on it I will let you know.

You would think we could find something specific to the 650 and if it is worth doing it.
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