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SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Does your bike backfire /cgi-bin/YaBB.pl?num=1276816833 Message started by Tiefighterpilot on 06/17/10 at 16:20:31 |
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Title: Does your bike backfire Post by Tiefighterpilot on 06/17/10 at 16:20:31 I hear conflicting take on backfiring. Some say thats the way it is. Others say you can fix it. |
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Title: Re: Does your bike backfire Post by TommyRocket on 06/17/10 at 19:34:40 I just put a DJ jet kit in my girlfriend's S40. Bike was 100% stock. In very good tune - I adjusted the valves, decomp, new air filter, and put in a new plug before I played with the carb. It would backfire very often and with a loud backfire when shut off. Fuel screw had very little effect. Bike would still idle with it turned all the way in. I went to a 47.5 non-bleed pilot. (I wanted a 50 but the 47.5 is still better than the 52.5 that was in it.) I installed the jets recommended by DynoJet. DJ140 main, DJ needle on the 4th clip. Fuel screw 2 turns out and now it responds the way it should to adjustment. It rarely backfires when riding and just has a light "poof" when you shut it off. When it does backfire it is much quieter than it was. Bike runs great and even starts quicker. I'm sure this has already been discussed on here somewhere, but I'm new and like to learn the hard way. The taper on the DynoJet jet needle is almost identical to the stock jet needle. Shaving down the plastic spacer would have had the same effect as installing the new needle. I saw a member selling jet kits. I think it was Lancer. I should have bought one of his and save some cash. PS - I'm at about 900' elevation. |
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Title: Re: Does your bike backfire Post by justin_o_guy2 on 06/17/10 at 19:51:02 If Bills bike could talk, it would complain about HIM backfiring. |
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Title: Re: Does your bike backfire Post by justin_o_guy2 on 06/17/10 at 19:53:38 Mine rumbles & grumbles & sounds great, I think. Every once in a while itll give me a decent sized POW, but generally, it sounds like an old truck w/ a glass pack & standard trans on decel,, just a low grumble with a few minor exclamation points. |
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Title: Re: Does your bike backfire Post by Bubba on 06/17/10 at 19:59:12 Rarely backfires on shutdown...usually only if it's cold (40 degrees). If I wind the throttle WAY out it pops between shifts otherwise if I'm gentle with it, it just growls (LOVE it). A mile high, open pipe, K&N drop in air filter, 52.5 w/bleed holes, 150 main, 2/3 spacer, airscrew out 2 turns... |
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Title: Re: Does your bike backfire Post by kimchris1 on 06/17/10 at 20:02:55 Mine did now and then. At times on shut down it had a lil bit of a pow yet not very loud. She has not had anything done to her jets yet nor her valves. That may change soon. ;) |
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Title: Re: Does your bike backfire Post by Paladin. on 06/17/10 at 20:13:57 I love the backfire. I like the close of the throttle that sounds like a Jake Brake. When I was riding down following Wendy from Duarte to Gardena she was watched fire up the muffler on deacceleration. |
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Title: Re: Does your bike backfire Post by Charon on 06/17/10 at 21:23:00 The poll doesn't have the choice for mine. It has never yet popped on shutdown, and only sometimes does it pop on deceleration. Exactly the same as my old Suzuki Tempter did, back in '83. |
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Title: Re: Does your bike backfire Post by alcoa on 06/18/10 at 03:36:18 Just a poof on shut down stock 07 only bike I have had or will have. :) |
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Title: Re: Does your bike backfire Post by babyhog on 06/18/10 at 05:38:36 I love it when it rumbles! I certainly wouldn't want to "fix" it. |
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Title: Re: Does your bike backfire Post by Horatio Hawkshaw on 06/18/10 at 07:09:45 I do like the "pow" on shut down when I'm at work- the acoustics of the parking deck makes it sound like a Howitzer. I've only seen one guy hit the deck so far :D |
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Title: Re: Does your bike backfire Post by cursal on 06/18/10 at 07:11:12 Just a poof on shutoff. I can create a backfire by holding in the clutch and revving it up a few times while riding then putting it back in gear...or sitting still in"N". ------------------------ Edit* Update: based on what sjaskow has said I do only use 93... Primarily from Shell 93 = a kind of sigh on shutoff and no pops on decel |
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Title: Re: Does your bike backfire Post by sjaskow on 06/18/10 at 10:42:16 I've discovered how much mine backfires depends on the octane of the gas I put in it. It works likes this: 87 = popping on decel and poofs on shutoff 89 = poofs on shutoff and a pop on decel every once in a while 93 = a kind of sigh on shutoff and no pops on decel My bike is an '06 with almost 11,000 miles and is still 100% stock on the carb and exhaust set up. The gas I use is almost always Marathon. I very occasionally use Shell but when I do it's their 93 octane stuff at the beginning of the spring. |
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Title: Re: Does your bike backfire Post by ralfyguy on 06/18/10 at 10:48:48 I get a poof on shutdown and the rumbles on decel, with kerpows when it goes down to between 3,000-3,200 rpm. This RPM range is almost guaranteed to create a kerpow, not above and not below that. I don't know why it is like that. At night you can see blue flames coming out of the pipe in unison with the rumbling, and when the ~3,000 rpm kerpow occurs, there's a blue flame coming out about 6 inches long. It constantly changes during the day on what it does. I can have days where it doesn't kerpow at all, no matter what. Next day it's back with a vengance. Some days there's not even the poof on shutdown. And I didn't change anything at all. |
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Title: Re: Does your bike backfire Post by Routy on 06/19/10 at 05:33:49 I know,.....it almost a big letdown when I get all prepared for the "big one",......and for some reason it doesn't ! >:( I think humidity plays a big part it that,.....but I'm not sure. I've never tried different octane. |
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Title: Re: Does your bike backfire Post by RideNaked on 06/20/10 at 01:02:46 So my bike started backfiring like crazy, even more than usual. When I was trying to figure out what was going on, I noticed that one off the bolts that holds the exhaust to the header was missing and the other bolt was spun way out. Not sure if that is the real problem as I just noticed and haven't been able to fix it yet. Thought it was pretty crazy though, considering I just bought the bike a couple months ago and it was definitely all tight then. And a couple weeks ago I had it inspected for damage by the local shop after getting bumped on the highway and they didn't say anything. Some fast-acting bad vibrations I guess. I have to say the 4 inch flame that shoots out is pretty sweet. You guys think those bolts could have worked their way out like that so quickly... Either way I'll be checking them regularly from now on... |
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Title: Re: Does your bike backfire Post by justin_o_guy2 on 06/20/10 at 02:01:01 Mite want to check the peg bolts. Those blasted exhaust bolts seem to either get loose or sieze up. Kinda gotta watch those things. IIRC, I put antisieze on mine. OHH yea, only torque them up cold. Be easy on them, its easier to tighten them up once in a while than repair threads or get a busted one out. |
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Title: Re: Does your bike backfire Post by Skid Mark on 06/20/10 at 23:13:26 The 08 I sold this year sure does. The new owner and I went for a ride today. Whenever she shut the s40 down the we beastie let one off that would do a shot gun proud. Good time watching people's reactions. ;D |
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Title: Re: Does your bike backfire Post by WD on 06/21/10 at 08:49:35 Speed downshifting sounds like an M60 .30 caliber belt fed machine gun. Regular up or downshifting can sound like a .22 or a .45... Wind it up and key kill it? Ever heard a 155mm howitzer? 155/55 jets, fuel screw wherever it has vibrated to this time, header nuts vibrated loose (constantly) and a leaky glass pack muffler. Not as bad with secondary baffling welded into the fishtail tip. If I pull the muffler and 29 inch tailpipe in favor of a turn down tip it will throw flames and blow holes in the yard... ;D Living by a major Stryker base it makes for some interesting hit the decks... |
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Title: Re: Does your bike backfire Post by prsavage on 06/21/10 at 10:03:42 No poll choice fits. Never backfires, no pop on decel, no poof on shutdown, no blue heat marks on the pipe and I didn't fix anything. A previous owner may have though. |
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Title: Re: Does your bike backfire Post by ralfyguy on 06/21/10 at 10:35:13 Kinda astounding to me how many people have issues with loose nuts and bolts. I keep checking every nut and bolt I can reach, and even when the tank is off any bolt and nut I can see there, on the motor, head and exhaust. Never had anything go loose. And I had stuff apart several times. In 9,000 miles nothing. The only thing I can't check is the head bolts under the head cover. I don't have the balls to open that. I don't think those ever got re-torqued. But it runs fine and no leaks around the head gasket, so I just leave it alone. |
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Title: Re: Does your bike backfire Post by weracerc on 06/24/10 at 12:10:06 93 octane in the humid mid atlantic = shift/decel pops and off POW!.....if i lived in a bad neighborhood i bet i would have already had return fire from the local hoodlums!.....so far just a few annoyed looks the first few times I arrived home and it ripped off a loud one!......maybe i should put a little beano in the tank instead of sea foam? |
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Title: Re: Does your bike backfire Post by b-p-stewart on 06/24/10 at 20:50:07 Mine does on decel and sometimes when I first crank it up. I bothered me when I first started riding the Savage, but know I have grown used to it. It is kinda cool, a very different sound from my old Shadow! I am happy I made the switch from Honda to Suzuki also, the Savage is a much better bike. Faster and lighter! Easier to ride! |
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Title: Re: Does your bike backfire Post by WD on 06/26/10 at 06:17:15 If someone offered me an 1100 ACE for for my Savage... sayonara baby bike. An ACE with aftermarket "Indian" fenders is better than my all time favorite metric (1500 Drifter). The Savage is a blended knock-off of several older English singles. Loose hardware is to be expected (so are oil leaks and electrical glitches). Just part of its charm. |
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Title: Re: Does your bike backfire Post by Ed L. on 06/26/10 at 19:00:48 Yup, Snap crackle and POP and I love it. It's part of the bike's charm. I got a ride on a Suzuki C50 last year and it wouldn't backfire, thought something was wrong with the bike ;) |
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Title: Re: Does your bike backfire Post by Garyt on 06/26/10 at 19:10:04 It has always had a poof and sometimes a loud pow on shutdown. The last few days I have beem putting on half choke just as I shutdown and now nothing no poof no pow just stops. Gary |
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Title: Re: Does your bike backfire Post by Routy on 06/26/10 at 19:41:29 It was warm this afternoon,....maybe even hot ! But I learned one thing for certain, my bike backfires much more positively on hot days. If I do it just right, it can be earthshattering ! ;D |
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Title: Re: Does your bike backfire Post by itsonlyme on 06/27/10 at 21:53:47 I am good to mine too and give it high octane gas everytime and it backfires occasionally on decel and always when i shut it down. i am learning to love it. ::) |
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Title: Re: Does your bike backfire Post by BurnPgh on 06/27/10 at 23:09:36 I get a sharp but not very loud pop sometimes when shifting at mid-rpms. A deep POOF on shutdown sometimes. I've got one of lancers cone filters and the air temp change between night and day sometimes causes a sharp backfire at night but it's not bad. |
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Title: Re: Does your bike backfire Post by Routy on 06/28/10 at 06:40:46 Hey,....I put some higrade in it,....that maybe didn't completely fix it, but greatly improved upon it. The only time it does it now is a nasty pop when shifting, (which I never heard before) an earthshattering blast when decelerating, and the normal pow-poof at shutdown ! ;D So, don't forget to put hi octane fuel on your list of backfire remedies :o |
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Title: Re: Does your bike backfire Post by franch on 06/28/10 at 09:48:48 mine backfires constantly upon decel and during shifting. i usually ride solo but a few weeks ago my cousin and i and 5 bikes altogether rode to laconia. they were following me and remarked on when it backfires about a foot and a half of flames come shooting out the pipe |
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Title: Re: Does your bike backfire Post by Overdrive on 06/29/10 at 07:53:35 587F627164797F5871677B63787167100 wrote:
Best post ever, hahah! As for mine, decels and the puff on shutdown. Doesn't really bother me, I figure it'll help to get the attention of people in cars who are going to want to claim that they 'didn't see me'. |
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Title: Re: Does your bike backfire Post by hansen on 07/11/10 at 10:57:23 I bought my 2008 S40 with 77 miles on it. The previous owner won it in an auction. It backfired on decel from day one. I returned it to the dealer who drilled out the mixture screw cover and adjusted the screw. I picked it up and it still backed fired, so it started turning the screw out CCW in small amounts until I had turned one full turn. Now it still occasionally back fires on decel and only poof when turned off. Did I turn this screw the right way and can I turn this screw out some more? |
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Title: Re: Does your bike backfire Post by Serowbot on 07/11/10 at 11:06:32 79636A65786E65383A330B0 wrote:
You made it richer... CCW... You need to know how far out you are... Turn it CW,... counting rotations as you go, 'till it seats... don't crank it tight... Then return to original position... You shouldn't go more than 3 full turns out, or there is a danger of the screw falling out... ( it's an expensive screw...)... :-?... |
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Title: Re: Does your bike backfire Post by verslagen1 on 07/11/10 at 11:12:46 243E373825333865676E560 wrote:
Backfire on decel most often is caused by loose header bolts or leaky muffler clamp, at least with a stock muff. that's the correct fix for the shutdown pow. I wouldn't go any farther than poof. as said, count the turns CW until it seats, lightly or it'll get stuck and you'll be up sh!t creek. Should be 3 or less, if greater than, go up a size in the idle mixture jet. |
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Title: Re: Does your bike backfire Post by hansen on 07/11/10 at 11:57:30 So turning the screw CW make it richer? |
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Title: Re: Does your bike backfire Post by verslagen1 on 07/11/10 at 12:03:31 2D373E312C3A316C6E675F0 wrote:
No, leaner, the purpose for turning it CW is to know how many turns out are you and is it safe. if you are in doubt, read up on it. plenty of definitive posts in the tech section |
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Title: Re: Does your bike backfire Post by RC on 07/11/10 at 21:32:28 No, I've fixed it is almost true, once in a great while I'll get a very light pop if I downshift into 2nd or 3rd at to high an rpm, Carb is stock, except pilot screw is out about 2 1/4 and stock type K&N. |
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Title: Re: Does your bike backfire Post by Routy on 07/12/10 at 05:26:28 Well, the poll still shows 60%+ So yours is definently broke ! But keep after it,......can't be that hard to fix ;D 7979686A79666268636A6E670B0 wrote:
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Title: Re: Does your bike backfire Post by jabman on 07/12/10 at 10:18:47 its simple if your bike backfires you have an air leak, an exhaust leak or need a larger main jet. |
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Title: Re: Does your bike backfire Post by DrunkenDwarf on 07/12/10 at 10:20:25 353E3D323E315F0 wrote:
Larger main jet? That's the first I've heard that suggestion. Why is that? -D. Dwarf |
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Title: Re: Does your bike backfire Post by ralfyguy on 07/12/10 at 10:36:03 He meant a larger pilot jet. |
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Title: Re: Does your bike backfire Post by jabman on 07/12/10 at 10:39:42 for me changing the pilot jet and screw sorts out the bang on shut down, and the main jet helps with deceleration noise. do you think the pilot helps with this as well? |
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Title: Re: Does your bike backfire Post by Nathan on 07/12/10 at 15:02:51 4A494845475D240 wrote:
AMEN! I get pops in between gear shifts when Im flying but if I take it easy nothing major, (either way I dig it) I also get the poof when I shut it down and think it sounds pretty sick. |
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Title: Re: Does your bike backfire Post by Kev on 07/18/10 at 18:23:40 Only backfires everytime I use the killswitch...loud as can be. Kinda embarassing, but i've learned that stalling it, it won't backfire. Any thoughts on that? By the way, mines an 86 with just over 29000 miles |
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Title: Re: Does your bike backfire Post by verslagen1 on 07/18/10 at 19:53:19 584B464C534D5F532A0 wrote:
check for loose header bolts or muffler clamp. if you have something other than the stock muff, it may be just to open to eliminate the pow's. |
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Title: Re: Does your bike backfire Post by verslagen1 on 07/18/10 at 19:55:15 5F7162777C756467140 wrote:
try fattening up the idle mixture a little. 1/8 turn at a time. If it takes more than a 1/4 turn from a smooth idle setting as instructed by lancer, then your idle speed may need to be set higher. I have an '88 carb on a '02 engine. 1st shutdown sounded just like a high powered rifle. I had the whole block come out looking, I nearly fell over laughing and would dropped the bike on top of me. |
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Title: Re: Does your bike backfire Post by qp on 07/19/10 at 17:46:30 My Savage backfires normally. |
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Title: Re: Does your bike backfire Post by MMRanch on 07/20/10 at 20:29:20 If they doin't BACKFIRE something must be WRONG. 50/150 jets ... HD sportster muffler w3/8 hole in center baffle ... cone fillter. no pop on shift little pop on deceration / Flames only in pipe nice phoof on shut down if I doin't let it idle for 30+ seconds or so. 58 mpg at 50/55 mph |
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Title: Re: Does your bike backfire Post by Drove on 07/26/10 at 08:24:42 Are there any diagrams around to show exactly where the mixture screw is? |
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