SuzukiSavage.com - Research,S-40 Backfire Issues

roughrider

Ex Member

Research,S-40 Backfire Issues
08/09/05 at 08:47:19

I am compiling information regarding the backfire problem with the S-40 Savage/Boulevard. Any information would be greatly appreciated. I need websites and any hard core evidence not just chat regarding this problem. This backfiring problem could be fixed properly without decreasing the horsepower or the handing of the bike. I find it rather "Silly" that we the consumers are trying to modify the carb. on these bikes. Improper modifications by the consumer to the bike voids the warranty. Some states won't approve safety inspection on theses bikes. They check for hydrocarbon emmisions out the exhaust for inspection purposes. This is why the dealer and manufactuer refuses to resolve this issue. If they make the modifications that some of you are making they the manufacturer and dealerships would be liable. Suzuki being forced by the E.P.A. to meet certain emmision standards chose the less expensive way to meet those standards. I have ask a consumer recall group to study this problem. Your help could force Suzuki to modify the bikes in a recall old and new. This is not a (class action suit) This is only a method to jointly compile information that the manufacturer and the dealers don't want you, the consumer to know. Thank You

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Dynobob Serious Thumper Offline 2003 LS650 (with Supertrapp) Posts: 634 Northern Virginia Gender:	Re: Research,S-40 Backfire Issues Reply #1 - 08/09/05 at 10:38:20 All the late model LS650 and S40 Suzukis backfire but I seriously doubt a recall is warranted. Here's the best description of the problem I've seen: http://www.heise-workstations.de/ls650/Reviews/BrucesReview-e.html
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red2k1 Ex Member	Re: Research,S-40 Backfire Issues Reply #2 - 08/09/05 at 11:04:01 This condition has been known for years. It is always useful to do research before a purchase and not afterward. Good luck with your project though, it is just that I have no sympathy for it.
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rkutzner

Ex Member

Re: Research,S-40 Backfire Issues
Reply #3 - 08/09/05 at 17:57:11

It's not a 'Suzuki' problem. Almost every non-FI bike purchased by my friends has had the same issue......singles seem to show it more. The problem is NOT Suzuki, it is the tree huggers. It is simply a lean condition caused by a federally mandated idle setting to meet a specified emission standard.

And adjusting the idle mixture screw, especially throughout the seasons, is the MOST NORMAL CARB thing known to mankind. No different than when you buy an ATV, depending where you live, weather and ALTITUDE depending, you need to rejet them, too, to get max performance. This mod does NOT decrease power, but INCREASES it.

People have modified and improved vehicles since the wooden wheel was invented.....you would be better off spending your time learning to fine tune a carb. My S40 SCREAMS now with a K&N, 2 2 1/2" holes in the baffle, the proper idle adjustment, a little needle adjustment, and a bigger main jet. Same stuff you get when you buy a performance exhaust for a Yamaha or a Harley...........really.....

Now I don't mean to get on you, I really do welcome you to the Savage world. Grin

It is a great bike for those who wish to, or don't wish to, modify. But at least turn that idle mixture screw out 1.5 turns. Just about every carb, bike or car, that I ever worked with was made to run around that setting. My S40 from the factory was less than an 1/8th out. No carb was made to run with the mixture screw almost closed !!! And readjust it with the seasons......it's a 'carb thing'.

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roughrider Ex Member	Re: Research,S-40 Backfire Issues Reply #4 - 08/09/05 at 19:35:12 your modifications void your warranty.
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Savage_Rob Serious Thumper Alliance Member Offline Mechanically Inclined Amateur Posts: 6972 Texas (Dallas area) Gender:	Re: Research,S-40 Backfire Issues Reply #5 - 08/09/05 at 20:23:48 Most bike warranties expire so quickly it's almost comical. Only a few offer more than a year.
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LANCER Serious Thumper Alliance Member Offline Savage Beast Performance Parts Posts: 10875 Oklahoma Gender:	Re: Research,S-40 Backfire Issues Reply #6 - 08/09/05 at 20:26:35 It only voids the warranty for the first 12 months.................
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shawn_b Ex Member	Re: Research,S-40 Backfire Issues Reply #7 - 08/09/05 at 20:29:17 there not much of a warranty on these bikes pluse for 4,000$ new it's the best thing out there for the money with or with out the backfire shawn
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Richard Amirault

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Re: Research,S-40 Backfire Issues
Reply #8 - 08/10/05 at 07:34:42

RoughRider wrote on 12/31/69 at 16:00:08:

I am compiling information regarding the backfire problem with the S-40 Savage/Boulevard.(snip)

Just what "problem" are you refering too??

The Savage / S-40 will backfire. As I understand it, it is common for single's to do this. The Savage / S-40 is a single. What is the problem?

Richard in Boston, MA, USA

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PerrydaSavage

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Re: Research,S-40 Backfire Issues
Reply #9 - 08/10/05 at 12:24:03

8)My '03 LS farted quite a bit when new ... mostly on decel when going off throttle ... also, engine used to cut out from time-to-time when backing off throttle while getting ready to downshift ... someone suggested increasing the idle by turning the set screw at the carb (near choke L.H. side of Bike) ... which I did, increasing the engine idle slightly ... Bike doesn't cut out on decel anymore and hardly ever farts!

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Mr 650

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Re: Research,S-40 Backfire Issues
Reply #10 - 08/10/05 at 13:50:06

RR,
The Savage/S40 is one of, if not THE LAST carbed bikes for sale U.S. w a decent size motor.
The same EPA problems were experienced by the Big 3 30 years ago and is why they began to convert to EFI 25 years ago. Same for bikes now. Remember how your old 70-something would vapor-lock, run-on, sneeze through the carb, sink/burn valves and such?? (reference movie Uncle Buck- 70's Merc)
I think most Savage owners are aware of this.
The EPA specs percentages, not amounts/weights of smog/ vehicle.
As such the S40/Savage is not a 'bad guy' even w/ a proper tune up.

Now will Suzuki install EFI & catalytic converters on your bottom feeder of the Boulevard line to make you happy, no way, Jose. They sure don't carry many accessories and the same bike has been around 20 years.
Maybe stop shipping to the U.S. or just kill it tho. vs. some class action expendatures.
If they kill it, new parts go away in ten years.
That is why my 1st new bike- '83 GS750Es is gathering dust now, no parts thank you very much.
I am a biker, not a consumer when it comes to MY Savage 8)
What state do you live in, BTW?

RoughRider wrote on 12/31/69 at 16:00:08:

I am compiling information regarding the backfire problem with the S-40 Savage/Boulevard. Any information would be greatly appreciated. I need websites and any hard core evidence not just chat regarding this problem. This backfiring problem could be fixed properly without decreasing the horsepower or the handing of the bike. I find it rather "Silly" that we the consumers are trying to modify the carb. on these bikes. Improper modifications by the consumer to the bike voids the warranty. Some states won't approve safety inspection on theses bikes. They check for hydrocarbon emmisions out the exhaust for inspection purposes. This is why the dealer and manufactuer refuses to resolve this issue. If they make the modifications that some of you are making they the manufacturer and dealerships would be liable. Suzuki being forced by the E.P.A. to meet certain emmision standards chose the less expensive way to meet those standards. I have ask a consumer recall group to study this problem. Your help could force Suzuki to modify the bikes in a recall old and new. This is not a (class action suit) This is only a method to jointly compile information that the manufacturer and the dealers don't want you, the consumer to know. Thank You

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CHRIS

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Re: Research,S-40 Backfire Issues
Reply #11 - 08/10/05 at 15:20:39

I totally understand that when you buy something "new" you'd like to have it perform perfectly at least until the warranty expires, but like others have been saying, this is a well known fact with this and other singles. I'm just not sure what you're trying to accomplish by doing this... If Suzuki has to recall every savage and S40 made this will most certianly be the end for the machine. I'm with others in saying you do the research before you buy, and if you didn't, don't go around crying that you got ripped off!!!!

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DavidV

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Re: Research,S-40 Backfire Issues
Reply #12 - 08/10/05 at 16:25:13

What's the big deal? The backfiring is pretty easy to fix. It only took me one lazy afternoon to rejet, change the white spacer and adjust the idle mixture. I'm sure you've got a buddy who can do it for the price of a burger and a few beers.

This defect is nothing like those Chevy Vegas that came with free rust, right off the showroom floor.

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sluggo Serious Thumper ModSquad Offline big singles lead, twins follow the pack Posts: 4744 moses lake washington Gender:	Re: Research,S-40 Backfire Issues Reply #13 - 08/10/05 at 17:34:42 DavidV wrote on 12/31/69 at 16:00:08: . This defect is nothing like those Chevy Vegas that came with free rust, right off the showroom floor. free rust, my dealer charged me for it.
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Savage_Rob

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Re: Research,S-40 Backfire Issues
Reply #14 - 08/11/05 at 05:35:39

I think I tend to agree with Mr 650 on this. You have an inexpensive, no-frills bike here. If you make enough noise about improvements, it will become cost-prohibitive very quickly and they will simply cease to produce it; or at least cease to market it in the U.S. In my opinion, it has no chance of producing a desirable result and is simply a misguided idea. While there are plenty of causes out there that can use a champion, this isn't one of them.

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