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Discussion Starter #1
Hi all!! I just took my air cleaner off and inspected my throttle bodies for the 1st time. The owner before me removed the secondary throttle plates and I cannot find out where to purchase or get new secondary throttle plates from. Any suggestions would be great... Dang this bike loves the road/dirt/etc.???? Thanks in advance!! 2009 DL1000.
 

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RJP, the secondary throttle plates are not available as separate pieces from Suzuki. I'd be looking for a good, unmolested set of throttle bodies from a motorcycle salvage yard.
 

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Many bikes run better and have more power w/o the secondaries. Are you sure you want them back in? I admit, I have no idea if VStroms specifically, are better or worse with them out.

Edit, BTW, often, the screws are so threadlocked, they get drilled out. So it's very likely you couldn't replace them even if you found a set.
 

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Discussion Starter #5
Ya, I was hoping not to have to buy a whole throttle body but looks like I might have too... And I will check the threads, Thank you both!!!??
 

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RJP, take a gander at this:

Also, I have successfully removed hundreds of throttle plates that were loctited in without a problem. Mazda had a huge recall on their variable intake runner '99-'03 Proteges, and the work consisted of removing the throttle plate screws with new screws equipped with a different locking agent. Never had a problem either removing the old screws or installing the new screws. In the old carburetor days Ive removed throttle plate bolts whos threads were "scotched"(technical service bulletin, not mine). and after installing thenew screws, all I had to do was was scotch the exposed threads with a wire cutter.
 

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The problem is: you didn't remove them. lol Many people give up and just drill them. I assume the video guy is against removing them? I can't understand him....what language is he speaking? :grin2:
 

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It wasnt a problem at all. Some screws fell out on their own, most were still in place. And some times both plate screws fell out and the plate was found in the intake manifold. In extreme cases the screw stuck to the piston and bent a valve, or scored a cylinder wall, or made it through the exhaust and was found sitting on top of the warm-up catalytic converter.
Rolex posted about the use of JIS screwdrivers, and they indeed are far better for Japanese screw removal than the more common Philips screwdrivers.
If there is any doubt about removing screws that are loctited in, I merely hold the tip of a 24+watt soldering iron on the screw's head for 5 minutes, the loctite melts, the the screw comes right out.
Works great on removing the handlebar clutch switch retaining screw. Saved me from a breaking the bolt head off, drilling and tapping the switch perch to install a new switch.
 

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As best I can tell, removing these makes power delivery at part throttle a little more abrupt, leading many to believe that they've magically found more power.

Also, if your secondary throttle position sensor is worn out, the secondaries could start misbehaving and cause some weird issues; removing the plates in this case keeps the secondary throttle system from having any effect. The primary TPS is a well-known issue, of course, but the secondary wears out too.

Personally, I much prefer the bike's better manners with the secondaries in place. You can get back into the power sooner and more smoothly in a corner.

Anyway, in the end it's mostly a matter of personal taste, and it's not a huge difference. Try it and see what you think.


If you'd like to try your bike with secondaries, there are probably hundreds of sets out there that have been tossed into boxes or toolboxes, and they fit into a normal envelope. Post in Parts Wanted and you should be able to score a set cheap.

You'll probably need to visit a real hardware store (not a big box...) to find some M3 screws.

My bike came to me without the secondaries, and it didn't take long to find a set of these. It's the sort of thing lots of riders have lying around, but no one really bothers to put up for sale, so you'll need to ask.
 
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Removing secondaries is a sportbike thing. I'm surprised they were removed on a VStrom. An 06 ZX14 detailed multi run dyno test showed a 21hp increase with properly adjusted PC3 mapping, but they recommended secondary removal for race use only. (Brocks Performance)
 

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RJP, many of us have removed the secondaries for quicker throttle response and more power in 5th and 6th when the secondaries block some of the intake air to reduce the available power. They serve no practical purpose that I can tell. I wouldn't put mine back in on a bet. Just one more thing to possibly go wrong. If I could find mine, you could have them. tiny little screws and all:). I would not be doing you a favor, though.
 

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RJP, many of us have removed the secondaries for quicker throttle response and more power in 5th and 6th when the secondaries block some of the intake air to reduce the available power. They serve no practical purpose that I can tell. I wouldn't put mine back in on a bet. Just one more thing to possibly go wrong. If I could find mine, you could have them. tiny little screws and all:). I would not be doing you a favor, though.
Are you running a Power Commander, or equivalent? Just curious. Many say that makes a huge difference if you do remove 'em.
 

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Discussion Starter #14
Ya I could not post in the wanted section because I think I need more posts before I am allowed?? Kind of weird! Thanks for all the input guys!!! ???
 

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I have them, just removed them. They are still sitting on my lift. If you really want to put them back in PM me and I'll mail them to you as long as your in the US
 

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RJP, many of us have removed the secondaries for quicker throttle response and more power in 5th and 6th when the secondaries block some of the intake air to reduce the available power. They serve no practical purpose that I can tell. I wouldn't put mine back in on a bet. Just one more thing to possibly go wrong. If I could find mine, you could have them. tiny little screws and all:). I would not be doing you a favor, though.
Bobby, I removed my secondary flys last night, on my 07 Bandit. The Bandit guys (and Dale Walker, of Holeshot) claimed the 1250 is even smoother with them out, and many reports claimed 12-14 honest to gawd HP increase from fly removal alone! (with dyno charts as proof) Did a TB sync today, and it is spectacular! Unlike the early sign off in upper range, it now pulls extremely hard clear up to redline. It's a totally different bike now! I'm a believer!! I won't do it to my Wee, but it will probably be for sale before long anyhow. I rode the Wee twice this week,(picking things up, needed the trunk) after it sat for a month or so, and it was surprisingly disappointing.
 

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Always wanted a Bandit 1200 Don Ohio!! Test rode one once, sweet bike!!!! Good stuff sir!!!!??
That's what I've heard....never had a 1200, but when they went to water cooled, the 1250 bug bit me. I sold this one 10 yrs ago, then bought it back last month. The owner only put on 1500 miles. His current girlfriend hates bikes! lol I'd get a different girlfriend!! :grin2: It just turned over 10k miles tonight, so it should serve me well for a good long time.
 
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