SuzukiSavage.com - Changing muffler / Jets

Jacob

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2012 Suzuki S40 650

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Ford City, PA
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Changing muffler / Jets
05/27/12 at 20:43:01

I have a completely stock Suzuki s40. I am in the process of buyimg a Dyna muffler right now. I've already drilled out the brass plug for the mixture screw. I read on here to use the 150 main and leave the pilot at 52.5 I also read to go 152.5 main and leave the pilot 52.5. Like I said, bike is all stock. I'm sure some people have changed out there stock muffler for a Harley Dyna and want to know where to start? Anything will last

Thank you

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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Changing muffler / Jets Reply #1 - 05/27/12 at 21:15:58 YOure at sea level,, well,, 800 feet, snot a lot,, so, youre lean now, the dyna isnt super open,, how is it on popping & growling?
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rfw2003

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Yantis, TX

Re: Changing muffler / Jets
Reply #2 - 05/27/12 at 21:41:38

just to tag onto this instead of opening another while I wait on my jets to arrive. I have a Jardine Slip-On that came on the bike when I bought it and just installed a K&N filter. I'm sub 1000 feet altitude as well so I'm guessing from reading I should be pilot #55 and 155 Main or should I use the leaner 152.5 main. Not sure how the Jardine is compared to a Dyna muffler.

R.F.

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1996 Savage, Corbin Seat, K&N filter, Slip Streamer Enterprise II windshield, LED bullet signals, Cat's eye LED tail light Ryca reverse cone long muffler

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Routy

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Re: Changing muffler / Jets
Reply #3 - 05/28/12 at 06:49:16

What you read, should be guidelines, not gospel !
It seems you guy's are just itching to" hack a carb"
Why not read just a little less, and think more of the ole saying......
if'n it ain't broke don't fix it ? All bikes don't run the same w/ the same mods.
IMO, if its running good, don't touch it.
But if you do work it hard in hot weather, play it safe,.... start w/ uping just the main jet to a 150 ?? and go from there? Do any carb mods one step at a time. Then have a good reason to do more.

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Rich
'07 S40 Blvd stocker, except drilled OEM exhaust and white spacer mod...1/2 (.055)

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rfw2003

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Yantis, TX

Re: Changing muffler / Jets
Reply #4 - 05/28/12 at 10:42:26

well to be honest I was just looking for ya'lls tried and trued wisdom on what worked for the most part. Was figuring that I would have to play with it a little to get it just right for my little savage. I was just looking for a starting point is all to get me in the ballpark. But you are also right on another point, meaning if it's running good leave it be. Since putting in the K&N and the temps have started to rise a little more the backfiring has pretty much diss-appeared and I know the carb has already been messed with by the PO because the brass cap has been removed from the pilot circuit adjustment screw.

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1996 Savage, Corbin Seat, K&N filter, Slip Streamer Enterprise II windshield, LED bullet signals, Cat's eye LED tail light Ryca reverse cone long muffler

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bobber_prjct_2010

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Re: Changing muffler / Jets
Reply #5 - 05/29/12 at 09:58:30

Routy wrote on 05/28/12 at 06:49:16:

What you read, should be guidelines, not gospel !
It seems you guy's are just itching to" hack a carb"
Why not read just a little less, and think more of the ole saying......
if'n it ain't broke don't fix it ? All bikes don't run the same w/ the same mods.
IMO, if its running good, don't touch it.
But if you do work it hard in hot weather, play it safe,.... start w/ uping just the main jet to a 150 ?? and go from there? Do any carb mods one step at a time. Then have a good reason to do more.

I completely agree. I installed a shorty muffler on my bike last week. Everything on my bike is stock. The backfiring was terrible, however, I found that I had a tiny leak where the header bolts to the motor. Once I fixed that, no more backfiring and I didn't even touch the carb. If it runs good now, don't mess with the carb.

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