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SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> - DYNA Muffler adapter ??? /cgi-bin/YaBB.pl?num=1443386041 Message started by DesertRat on 09/27/15 at 13:34:01 |
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Title: - DYNA Muffler adapter ??? Post by DesertRat on 09/27/15 at 13:34:01 I found your mod, cool BTW, wondering if you have seen the RYCA version, they cut the header pipe back to 1" from the end of the flange. would this cut mod give us more room for mounting to the stock location? |
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Title: Re: DAVE - DYNA Muffler adapter ??? Post by Dave on 09/27/15 at 17:50:50 The stock bike has the inner pipe in the header extending beyond the outer pipe...and it can be trimmed without really affecting anything. The RYCA adapter works fine....although I believe the DYNA works best with a 6 degree bend....and the RYCA is a 10 degree bend. |
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Title: Re: DAVE - DYNA Muffler adapter ??? Post by DesertRat on 09/29/15 at 18:10:59 thanks Dave. muffler came in. stopped by the auto parts tore and picked up this adapter, it fits really tight. gonna mod the header end with hacksaw cuts for pinch/cinch point. http://www.amazon.com/Nickson-Industries-17515-Exhaust-Adapter/dp/B00AZWT3SI http://www.autozone.com/1/products/472968-1-3-4-i-d-x-1-3-4-o-d-length-adapter-nickson-17515.html http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313.TR0.TRC0.H0.Xnickson+17515.TRS0&_nkw=nickson+17515&_sacat=0 |
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Title: Re: DAVE - DYNA Muffler adapter ??? Post by DesertRat on 09/29/15 at 18:11:35 it's a nice fit |
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Title: Re: DAVE - DYNA Muffler adapter ??? Post by DesertRat on 09/29/15 at 18:12:15 1 3/4" ID x 1 3/4" OD |
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Title: Re: DAVE - DYNA Muffler adapter ??? Post by DesertRat on 10/03/15 at 16:19:54 Using a portion of Serowbot and Dave's muffler mod's: LAYOUT for hacksaw cuts - 1" from end all the way down to the 1" mark all 6 cuts - |
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Title: Re: DAVE - DYNA Muffler adapter ??? Post by DesertRat on 10/03/15 at 16:20:23 the cut setup - |
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Title: Re: DAVE - DYNA Muffler adapter ??? Post by DesertRat on 10/03/15 at 16:21:27 the finished cuts with clamps (both are from the Harley Dyna muffler off eBay) - |
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Title: Re: DAVE - DYNA Muffler adapter ??? Post by DesertRat on 10/03/15 at 16:30:00 muffler adapter to header parts, these fill that gap in the adapter: Emgo Muffler Reducer 80-47310 http://www.amazon.com/Emgo-Muffler-Reducer-80-47310/dp/B00230CC0G/ref=pd_sim_sbs_263_2?ie=UTF8&refRID=0CGSQTQR9GDBEATEGDAP&dpID=41w9rwcQJcL&dpSrc=sims&preST=_AC_UL160_SR126%2C160_ |
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Title: Re: DAVE - DYNA Muffler adapter ??? Post by DesertRat on 10/03/15 at 16:35:52 you're gonna need 2 (two) clamps 44-45mm or 1-3/4", if your muffler didn't come with them: either 2 (two) of these: Rush Exhaust Torca Exhaust Clamp - 1-3/4in. 65283 http://www.amazon.com/Rush-Exhaust-Torca-Clamp-65283/dp/B00317DKWO/ref=pd_sim_263_5?ie=UTF8&refRID=1Z864NC6QP7HG2JVYGVM&dpID=413MJVh-HyL&dpSrc=sims&preST=_AC_UL160_SR160%2C160_ or 2 (two) of these: 1-3/4" Torca AccuSeal Exhaust Clamp, Aluminized Steel http://www.amazon.com/Torca-AccuSeal-Exhaust-Clamp-Aluminized/dp/B004G8X0CW/ref=pd_sim_sbs_263_4?ie=UTF8&refRID=1B2YVKTF045D6KBDA4NC&dpID=41HsNe7imdL&dpSrc=sims&preST=_AC_UL160_SR160%2C160_ |
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Title: Re: DAVE - DYNA Muffler adapter ??? Post by DesertRat on 10/03/15 at 18:39:52 you're gonna need some hardware too; M8-1.25x30mm bolts and M8 hex nuts and M8 split washers and M8 and M10 flat washers: |
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Title: Re: - DYNA Muffler adapter ??? Post by DesertRat on 10/03/15 at 18:54:35 OPTIONAL; MEANING not necessary, but for me i'm using this wrap as a single wrap on the HEADER pipe connection to eliminate any exhaust leaks. I'M NOT USING THE GOOP that comes with it. Just a single piece that only meets at the ends, no overlap! |
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Title: Re: - DYNA Muffler adapter ??? Post by thumperclone on 10/03/15 at 23:47:43 do a search or one of the mods remember there is an old post on this 7 deg. kick ? inches long my local midas muff shop made one for me in 06 $5 |
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Title: Re: - DYNA Muffler adapter ??? Post by Dave on 10/08/15 at 05:29:43 7B677A627F6A7D6C6360616A0F0 wrote:
6 degrees for the DYNA...betcha 7 would work fine however. The RYCA adapter is 10 degrees and can work. http://suzukisavage.com/cgi-bin/YaBB.pl?num=1353284557 |
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Title: Re: - DYNA Muffler adapter ??? Post by DesertRat on 10/08/15 at 06:04:36 this MOD worked out just fine. Had to do the Idle Air/Fuel mix plug MOD. about a 1/4 turn worked out the backfire issue on DECEL. Runs great now. |
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Title: Re: - DYNA Muffler adapter ??? Post by DesertRat on 10/11/15 at 08:09:09 well, what I thought was good on the Idle Air/Fuel mix plug MOD didn't work out. Still a backfire on DECEL and during shifting. I can't seem to find the sweet spot on this adjustment. There's a noticeable difference with adjustments, some worse, some better, but none that resolves the backfire completely. I'm not one to go in and change a bunch of chit and then piss and moan about it not being fixed. So I like to take things one at a time. These mikuni carbs aren't like the old school honda carbs I'm used to messin' with, these only have one adjustment, honda has everything on the outside. MOD's thus far: 1. DYNA muffler swap. 2. Idle Air/Fuel mix plug MOD. (3/4 turn CCW from stock position when plug was removed) 3. ???? what's next? |
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Title: Re: - DYNA Muffler adapter ??? Post by Kris01 on 10/11/15 at 09:52:37 Don't tune for "no backfire". You'll never get rid of it. Tune for best performance. ;) |
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Title: Re: - DYNA Muffler adapter ??? Post by Dave on 10/11/15 at 10:11:41 I posted this in another thread....but I will repeat it here so I don't have to type it all again. It was a response to a fellow who said his bike backfires when the "snaps the throttle closed"....and it applies to anyone who allows the throttle to close completely while riding. "This is not the motorcycle that you should be "snapping the gas off", as it is certain to make noise when you do that. Carb jetting might make it a bit better - but it will not stop it from happening. You need to adjust your riding style to suit the big, primitive single with a carb.....this is not a modern, fuel injected motorcycle - it is a primitive beast. When you let the throttle snap closed, you have created a high engine vacuum that pulls a lot of air past the butterfly and slide - but the main and needle jets are closed off....only the idle circuit is providing fuel. The fuel mixture goes very lean as a result, and the spark plug can not ignite the mixture in the cylinder - but when the lean mixture builds up in the exhaust it can ignite and make the popping and banging sounds. If you jet to eliminate the noise when coasting - the engine will be running too rich when at a normal idle. When you shift gears you should gently roll the throttle off - but stop just a bit short of being all the way closed. Same thing when you are coasting down a hill or slowing down in traffic - roll the throttle off just far enough to slow down - but not all the way closed or the noise will begin." It is all part of being a "good" rider - you need to adapt your style to suit the motorcycle and it's quirks. |
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Title: Re: - DYNA Muffler adapter ??? Post by DesertRat on 10/11/15 at 13:31:59 Im wondering if these bikes backfire straight off the showroom floor? |
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Title: Re: - DYNA Muffler adapter ??? Post by KennyG on 10/11/15 at 14:21:37 Rat, Mine backfired when I shut the engine down after driving the bike off of the delivery truck the day I received my S40. Kenny G |
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Title: Re: - DYNA Muffler adapter ??? Post by DesertRat on 10/11/15 at 14:39:30 Interesting Kenny. Mine "farts" when shut off. But the backfire is kinda annoying during DECEL and shifting. Gonna try to be a "good" rider as Dave suggested. ;) |
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Title: Re: - DYNA Muffler adapter ??? Post by KennyG on 10/11/15 at 17:32:53 Rat, You will be able to improve the after firing with tuning and some gentle use of the throttle, but that is about as far as you can go. I spent a lot of time experimenting with various springs in the Transient Enrichment Valve. And when ever I would completely eliminate the after firing I had trouble with the RPMs dipping too low during deceleration. Once the engine stalled when I was downshifting in a really tight corner and that can be dangerous. One thing I have concluded is to make sure your idle speed is fast enough. When the idle speed is on the slow side you will increase the after firing. Kenny G |
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Title: Re: - DYNA Muffler adapter ??? Post by DesertRat on 10/11/15 at 18:36:57 6749426F5E4D5F442C0 wrote:
is there a way to check idle rpm without spending a fortune? |
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Title: Re: - DYNA Muffler adapter ??? Post by justin_o_guy2 on 10/11/15 at 18:55:40 Decel should rumble growl and occasionally pop some. If it's backfiring during shifting, either you've got a leak, throttle control needs considered or maybe you should get the thing shifted and back on the gas. I'm not there to see. From second on up it'll take gear shifts without touching the clutch, just open palm, slap the gas off with a quick lift on the toe and roll on the gas. It'll go right back down, too. Just don't do second to first, the RPM,jump is just more than I could ever master. Tried about six times, didn't jerk the crap out of it twice,, gave up on that before I hurt something. Describe backfire. |
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Title: Re: - DYNA Muffler adapter ??? Post by KennyG on 10/11/15 at 20:09:56 Rat, Before I had a tachometer I just did it by ear. There are videos on here that will give you an idea what the speed should sound like. Also, if you have a smart phone there is a way to check RPM, but you will have to ask someone a whole lot younger than me how to do it. Kenny G |
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Title: Re: - DYNA Muffler adapter ??? Post by DesertRat on 10/11/15 at 20:49:34 4E606B467764766D050 wrote:
Hey Kenny, Thanks for the smart phone idea. Here's a link to the iPhone App that works off audio from engines: http://www.tunelab-world.com/tach |
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Title: Re: - DYNA Muffler adapter ??? Post by Art Webb on 10/28/15 at 10:37:04 put the bike in first gear see what speed it Idles at on a FLAT section od road or parking lot, it should be about 9-10 MPH with no throttle and clutch fully engaged no fuss, no muss, no moola |
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Title: Re: - DYNA Muffler adapter ??? Post by Kris01 on 10/28/15 at 12:26:47 There's also some videos on YouTube that show the proper idle speed. You can tune your idle by ear with those. |
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Title: Re: - DYNA Muffler adapter ??? Post by Bubba on 10/28/15 at 15:08:50 One thing I've noticed about my bike is that when you set the idle a little high (no, I don't know what that means...lol) the backfire on decal and between shifts pretty much disappears... If I roll in to shut the bike off I drop the idle speed and it won't backfire...don't know why but it works me me! Anyone have any idea why this is so? I'm always fiddling with idle speed so it's just something I do now... |
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Title: Re: - DYNA Muffler adapter ??? Post by Dave on 10/28/15 at 17:52:53 5C6B7C7C7F2F2E262D1E0 wrote:
Yes.......when you increase the idle speed you are opening up the throttle and allowing more fuel/air into the engine - so when you close the throttle between shifts there is more fuel available to correct for the lean condition that exists when the slide drops and closes off the jet needle and main jet. You can accomplish the same thing by holding the throttle just slightly open when you shift or slow down - a more thorough explanation follows: The fuel mixture goes really lean when the throttle is closed and the engine is either slowing down between shifts - or you are slowing down and have the throttle fully closed. There is a high engine vacuum - but with the throttle closed and the slide down...the only fuel that is getting to the engine is coming from the idle circuit....and that is not enough fuel to allow the spark plug to ignite the mixture. So the fuel/air in the cylinder is not ignited and it just builds up in the exhaust....and eventually the mixture reaches a high enough temperature in the hot exhaust pipe that it spontaneously ignites and makes a bang. Suzuki tried to cure the problem with the TEV (Throttle Enrichment Valve) which is supposed to allow more fuel to flow during those high vacuum events - but it doesn't seem to work well with the E10 fuel. Maybe it works OK for folks who can still find pure gasoline. Some folks have fiddled with the spring in the TEV and claim to have made things better - but I don't feel it is a issue with the TEV not operating soon enough - I believe it just doesn't add enough E10 fuel. There are folks who put in larger pilot jets and open the idle mixture screw, and this helps compensate for the lean mixture when decelerating.....at the expense of an overly rich mixture when the bike is idling or at low throttle settings. Fuel mileage can suffer considerably, and the engine can belch black smoke when idling, and the engine can get loaded up with carbon. You really can make a big difference in the amount of backfire by how you use your right hand. When you shift gears just roll the throttle slightly back and don't let it close completely between shifts. When coasting just open the throttle a tiny bit until the backfire goes away - but not so much that the bike is accelerating....just enough that the slide rises and allows more fuel into the engine. For the "bang" after you turn the ignition off....the engine is still pulling air through the carb when it is spinning to a stop - and it is still picking up fuel as it passes through the carb. Since the spark plug doesn't ignite the fuel mixture when the ignition is turned off - the unburned fuel mixture is pumped into the exhaust. Once the fuel/air hits the hot exhaust system the temperature can reach the "flash point", and the fuel mixture can be ignited. When you have a high idle speed you pump more fuel/air into the exhaust system prior to the engine coming to rest.....with a slower speed there is less fuel/air pumped into the exhaust. |
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