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Message started by Pratik Tailor on 03/20/18 at 11:21:54

Title: Suzuki S40 Backfire
Post by Pratik Tailor on 03/20/18 at 11:21:54

Hello Everyone,

This is Pratik Tailor from Clifton New Jersey, I hope everybody is doing great here.

I bought 2006 Suzuki s40 with 4000 miles on it week ago. This is my first motorcycle, It was seating in old owner's garage from a year. I brought it home and changed oil and oil filter. Wanted loud exhaust so i did installed emgo turn out muffler and its sounds great. Problem is it is giving me back firing when i de-accelerate it while riding. Also i read on forum that after changing muffler we need to re jet carb. Is there anybody here who can assist me to solve this problem or refer me any good mechanic in my area who can solve this problem and re jet carb too.

Also I am looking for riders or any group in new jersey with whom I can go on ride this summer.

Any reply, suggestion will be appreciated.

Thank you. :)

Title: Re: Suzuki S40 Backfire
Post by verslagen1 on 03/20/18 at 12:16:14

member map
http://suzukisavage.com/cgi-bin/YaBB.pl?num=1444445797

Title: Re: Suzuki S40 Backfire
Post by Pratik Tailor on 03/20/18 at 12:51:45

Hello,

Thank You for your reply. I got members already but as I am a new member, I am not able to send message to any members. I think I have to have 10 post to send message anybody. I don't want to submit any junk posts just increase count. So I am waiting to reply someone in this thread only.

Once again Thank You for reply.

Title: Re: Suzuki S40 Backfire
Post by IslandRoad on 03/20/18 at 13:12:05

Hi Pratik,

It really is worth doing the tuning yourself. It can take a bit of time, and a lot of test riding (change jets, test ride for a day or two - or a week - change jets again, test ride again etc.).

I was completely new to motorcycles, and mechanics, about a year a go. I found tuning the carb to be a very satisfying (and exciting) experience. I also learned a lot about the bike along the way.

The key is to do lots of research first. There is a ton of information dispersed throughout this forum.

Here is a link to get you started. I think this is the best summary of carb tuning I've read on here.

http://suzukisavage.com/cgi-bin/YaBB.pl?num=1309246277

I'll post some more links in this thread over the weekend - when I drop into the forum from time to time.

A couple of quick points:

1. You'll need to find out what jets are in the carb at the moment. The previous owner may have changed them

2. Is the muffler you installed an open pipe, or does it have a baffle? Open pipes present their own specific challenges for carb tuning.

3. If the muffler is open, or nearly open, you will most likely need to tend to the intake on the carb, using a more open air filter.

Oh, and welcome :)

Title: Re: Suzuki S40 Backfire
Post by Pratik Tailor on 03/20/18 at 14:44:50

Thank you for your reply.

Emgo pipes are nearly open. Carb should be stock because it was lady driven bike and she didn't mentioned anything about carb tuning she did. Can you suggest anything about ideal screw adjustment before re jetting carb. Do you think so it can help with back fire.

Title: Re: Suzuki S40 Backfire
Post by badwolf on 03/20/18 at 15:51:39

I will tell you what I was told about backfiring, Don't ''snap'' the throttle off when shifting, ROLL it off some to shift but not all the way. With a little practice you can stop backfires while shifting just by changing your wrist ''programming''. After a while it will become automatic.
And you are not riding a multi cylinder bike, if you try to use heavy engine braking to slow down with a big single you WILL get backfires, some bad enough to damage your muffler's baffles. That is one of the ''blessings'' of big singles and is VERY hard to get rid of totally.
Ride more, worry less! A S-40 has a ''personalty'' and the best way to learn more about it is MORE MILES!
What do you mean guys to ride with this summer?
Local, medium distance, or long distance?
And what is a long ride for you, 100, 300, or 1000 miles?
There are a couple of rides coming up in western NC, and north GA that will be fun. And you can trailer your bike there, or close. Unless you are experienced at long rides to a campground trailering can be better as you can carry more ''stuff''.
Meantime just ride, clean, and get to know your new bike. (Cleaning is important for a new bike rider combo as you will be checking things over as you clean. Look for loose ''things'', oil leaks, marks that weren't there before, and fluid levels and tire pressures. Learn your bikes ''normal'' patterns and then something ''abnormal'' will stand out to you.)

Title: Re: Suzuki S40 Backfire
Post by IslandRoad on 03/20/18 at 16:07:43

BTW, a well tuned carb on this bike will still backfire in certain atmospheric conditions. If you tune the backfire out completely, you will likely be running rich in general.

Title: Re: Suzuki S40 Backfire
Post by justin_o_guy2 on 03/20/18 at 16:28:35

Late model Savages are jetted lean from the factory.
Your new muffler is gonna require you to rejet, bet on it..
It's not technically difficult. Getting the bowl off is not usually easy.
Start drizzling penetrating oil on the four screws now. And get a No Kidding, real,
JIS screwdriver. If you have a battery powered or air powered impact, that is helpful. A handheld, hammer impact is begging to break the carburetor.

Title: Re: Suzuki S40 Backfire
Post by Pratik Tailor on 03/20/18 at 17:01:04

Appreciate all replies here. And this is one of the best forum i have seen. All members are very active and ready to help. I am feeling glad i am junior member of this forum and i will learn a lot from you guys. And about trip this will be my first summer ride so i will prefer to be in New Jersey only for this year. And about re jet carb, i have battery powered and impect screw driver too. Its little cold here from next week temperature is going in 50s so i will go for a long ride round 200 miles and observe when it is back fiering. And looks like after installing muffler i lost power also. After that i will see videos and after that try to re jet carb.

Title: Re: Suzuki S40 Backfire
Post by justin_o_guy2 on 03/20/18 at 22:21:40

It's probably gonna blue the pipe if you don't get it running richer.
If you can feel the loss in power, it's a good bit leaner. That's not healthy for the motor

Title: Re: Suzuki S40 Backfire
Post by batman on 03/20/18 at 22:31:33

And you should post questions , in the Rubber Side Down section .You'll get quicker results that way. welcome!
IF you post your address or tell us your elevation above sea level , it may make it easier to recommend jet sizes, if you need help.

Title: Re: Suzuki S40 Backfire
Post by Pratik Tailor on 03/21/18 at 07:09:25

Elevation for My place is 85 feet. If someone can give me instruction for get it run richer and also replacement jet size pls.

Thank You.

Title: Re: Suzuki S40 Backfire
Post by Gary_in_NJ on 03/21/18 at 07:38:08

767467726F6D72676F6A6974363637060 wrote:
And about re jet carb, i have battery powered and impect screw driver too.

I'm gonna strongly suggest that you put those tools away when working on a Savage, especially the carb.

Title: Re: Suzuki S40 Backfire
Post by Pratik Tailor on 03/21/18 at 07:41:30

Got it Mr. Gary. May I know where you from in NJ if you don't mind?

Title: Re: Suzuki S40 Backfire
Post by justin_o_guy2 on 03/21/18 at 08:28:23

Start with penetrating oil applied over the course of a couple of days
Followed by the JIS screwdriver.
IF you can't get them out that way without wrecking them, then seat that electric impact firmly and give the trigger a quick flick. Don't just go wide open.
The wrong tip WILL yield the wrong results.
A #2 Phillips tip with the tip ground until it fully engages the slots in the screw will work. Operative word being
Fully.
Get a real penetrating oil, not wd40

You've gotta hold it securely and the impact has to be solidly in the screw.

Title: Re: Suzuki S40 Backfire
Post by Pratik Tailor on 03/21/18 at 08:39:27

OK. Can someone suggest me jet size needs to be installed and where to get it. My city is Clifton in New Jersey and all website is showing different elevation. Must be some were between 100 to 200 feet.

Thank You.

Title: Re: Suzuki S40 Backfire
Post by Gary_in_NJ on 03/21/18 at 08:49:44

[i]
323023362B2936232B2E2D30727273420 wrote:
Got it Mr. Gary. May I know where you from in NJ if you don't mind?
[/i]

Warren County

Title: Re: Suzuki S40 Backfire
Post by Matchless G11 on 03/21/18 at 09:40:37

5A584B5E43415E4B434645581A1A1B2A0 wrote:

What I know about jetting, (is very little) but jetting for altitude is taken in changes of 1000s of feet.

Title: Re: Suzuki S40 Backfire
Post by Gary_in_NJ on 03/21/18 at 10:09:16

There is a lot of jetting guidance in the technical section. There are baseline suggestions, what works one one bike may not work for an identical bike sitting right next to it, worked on by the same mechanic. It's always best to order one size larger and one smaller than the recommended size. It's also important that you start with fresh gas, clean air filter and a new spark plug.

Title: Re: Suzuki S40 Backfire
Post by Pratik Tailor on 03/22/18 at 09:30:28

Got it. Thanks for reply.

Title: Re: Suzuki S40 Backfire
Post by Serowbot on 03/22/18 at 09:40:36

I've grown to love my pops and blats on decel...
The other day I opened up my idle jet a half turn and they all went away.
After riding across town like that,.. I turned it back.

I really need that narley decel.
Grrrrrr,... Arghhhh...

Title: Re: Suzuki S40 Backfire
Post by Pratik Tailor on 03/23/18 at 14:06:17

My emgo exhaust is touching rear brake cable, I have read on forum that I need 1 3/4 pipe with 7 degree bent on it. Is there any way someone can provide me that because I went to muffler shop and he is saying $80 for that small modified pipe. Also i had to use muffler reducer because my muffler was not fitting directly to my bike and its leaking from header pipe joint. What will be best thing to seal that joint so it doesn't leak. That muffler person is asking for $50 to fix that leak.
If anybody can assist me with this problem.

Thanks.

Title: Re: Suzuki S40 Backfire
Post by Dave on 03/24/18 at 11:24:30

797B687D60627D686065667B393938090 wrote:

Is there any way someone can provide me that because I went to muffler shop and he is saying $80 for that small modified pipe. Also i had to use muffler reducer because my muffler was not fitting directly to my bike and its leaking from header pipe joint. What will be best thing to seal that joint so it doesn't leak.
Thanks.

Buy the angle exhaust adapter from RYCA.

https://www.ebay.com/itm/Motorcycle-Suzuki-Savage-S40-Exhaust-Muffler-Adapter-Cafe-Racer-Bobber/121587070981?hash=item1c4f277805:g:KtcAAOSw-jhUASnS&vxp=mtr

Title: Re: Suzuki S40 Backfire
Post by ohiomoto on 03/26/18 at 05:31:07

That Ryca adapter is worth the money. I got one and it fits perfect. No air leaks and it's looks good. Plus you'll save yourself a bunch of time.

Others have found muffler shops to make them a similar piece for a lot less, but they are not chrome and you have to take the time to find a shop that will do it, take them the parts and explain what you need. Then go back and do it again if it doesn't come out right.

Title: Re: Suzuki S40 Backfire
Post by Pratik Tailor on 03/26/18 at 06:07:43

Thanks everyone for reply. But I gave my bike to muffler shop and told him to install muffler and fix all leaks because that was not clamping also at the back. Clamps are different and not ligning up. Once it gets done from muffler ahop after that next project will be re jet carb and fix backfire.