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SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Big exhaust flames /cgi-bin/YaBB.pl?num=1258483901 Message started by Augusto on 11/17/09 at 10:51:41 |
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Title: Big exhaust flames Post by Augusto on 11/17/09 at 10:51:41 I solved the valve timing problem, now this is happening again, it happened before the timing went off btw. when I rev it WOT big flames and loud explosions come out of the exhaust pipe. the valve lash is quite tigth, I'll do them later could the carb be too rich or too lean? is it possible for the ignition timing to retard somehow? this happens only when the engine is warm, after some 20 minutes of riding. please advise. Augusto. |
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Title: Re: Big exhaust flames Post by justin_o_guy2 on 11/17/09 at 11:04:59 If the lash is too tight,, you need to fix that now. |
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Title: Re: Big exhaust flames Post by Yonuh Adisi on 11/17/09 at 15:01:21 As I said in your other post, since your timing jumped you need to check chain, tensioner and guides for excessive wear. It shouldn't have jumped unless one or more of those are wore out. |
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Title: Re: Big exhaust flames Post by Serowbot on 11/17/09 at 17:28:05 Big flames?.... Neat!.... ;D |
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Title: Re: Big exhaust flames Post by BurnPgh on 11/17/09 at 18:30:05 My buddy's savage does that. He's got a gutted (and extremely loud) jardine rumbler pipe and Im sure his carb has been rejetted by the previous owner but it runs so well he refuses to let me open the carb to see whats been done to it. Im geussing rich. Unburned fuel gets shoved out and ignites in the pipe. I could be entirely wrong though. |
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Title: Re: Big exhaust flames Post by Routy on 11/18/09 at 05:54:19 Yeah!, how do I get the flames,....I have everything else ! |
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Title: Re: Big exhaust flames Post by Boule’tard on 11/18/09 at 06:55:01 5A554F54484E5D5F57594E3C0 wrote:
I expected Rocco to say that, you beat him to it ;D |
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Title: Re: Big exhaust flames Post by T Mack 1 - FSO on 11/18/09 at 09:41:46 777A60797061746771150 wrote:
I expected Rocco to say that, you beat him to it ;D [/quote] Flames...... :o Night time, in the dark, rev the engine and let off the throtle quickly to get a small back fire. Really neat blue flames 8-). Happens on almost all the LS650's but really nice looking on the aftermarket exhausts. There's a YouTube video with it. |
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Title: Re: Big exhaust flames Post by Augusto on 11/18/09 at 10:50:25 this explosions are not neat they are anoying, the Jardine pipe also gets very hot and burns the rigth shoe. I have the carb appart and everithing seems correct but the main jet which was swapped by a previous owner, what is the std main and pilot jet sizes for it? is there a chance that the ignition timing is retarded? is it adjustable any way? Augusto |
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Title: Re: Big exhaust flames Post by Serowbot on 11/18/09 at 15:38:55 any muffler will burn your shoe... they do get hot... That's normal,.. and it's not going away... Unless you don't start it... :-? Do you have black smoke coming out the exhaust?... that would be rich... |
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Title: Re: Big exhaust flames Post by Augusto on 11/18/09 at 17:15:55 I meant that the muffler gets hotter than normal and radiates lots of heat. very hard to notice if there's black smoke, I wouldn't dare to say yes or no, the spark plug looks rich but not that much. anyone knows the jet sizes for this bike? |
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Title: Re: Big exhaust flames Post by Serowbot on 11/18/09 at 17:39:56 Stock,.. US... 145# main/52.5# pilot..... |
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Title: Re: Big exhaust flames Post by T Mack 1 - FSO on 11/18/09 at 19:33:01 Hmmmmmm .... could be too lean. :-? Too lean causes backfire. Too lean also causes high heat........ and the bikes are know to be lean running to start with. Jardine pipe, did you rejet the carb? |
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Title: Re: Big exhaust flames Post by Augusto on 11/19/09 at 05:10:49 I'm not sure if I explained the problem well from the begining, it's not the typical backfire that occurs when the throttle is shut, it happens when the gas is held wide open, the motor does not reach full rpm cleanly, instead it sputters and starts firing flames out of the exhaust. is like when the ignition timing is retarded and the spark occurs too late.. I'm not saying this is the problem but this is how it's happening. it already came with the jardine pipe and the carb has been messed up with, I just cleaned it up and adjusted the float which was very high (rich) the jet that it has now is # 125 but I'm at 6.600 feet of altitude, don't know if it's correct, I haven't found an altitude correction chart, do you have one? needles to say there's no way to accelerate hard, seems like the engine's gona blow up. Augusto. |
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Title: Re: Big exhaust flames Post by justin_o_guy2 on 11/19/09 at 06:53:22 Get the valve lash right before you burn the exhaust valves. the valve lash is quite tigth, I'll do them later |
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Title: Re: Big exhaust flames Post by Serowbot on 11/19/09 at 07:52:23 a #125 main seems very small for a bike with a Jardine, even at 6k alt... The altitude should make you one or two steps richer, but the Jardine will take you one or two lean... Try a stock 145#..... But get your lash set first like Justin said, ... no good jetting a motor that isn't ready... also, check your carb vacuum line for the presence of fuel..... there should be absolutely none.... |
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Title: Re: Big exhaust flames Post by Augusto on 11/23/09 at 10:53:18 definitely too lean, I tried a 145 and was a bit rich switched to a 135 and is perfect. now the problem showed up again, and this time is not carb related, I think I found it out. after some 20 minutes or more of riding the engine starts to backfire and looses power and finally dies, after it cools down starts and runs fine for another 20 minutes. I can feel the Igniter warm but seems like normal to me, what looks very wrong to me is the ignition coil, between the primary leads there's 5.6 ohms and between the HT to any of the low voltage terminals there is 26.000 ohms... not sure about this coil but if it's similar to the rest of the world coils it's way off and looks to me like this is the problem. any tougths please? |
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Title: Re: Big exhaust flames Post by Charon on 11/24/09 at 07:58:40 Coil readings sound about normal. Usually, the coil fails "open" and the machine won't run at all. Your description of holding the throttle wide open and getting rough running and flames sounds to me like you are running up against the electronic rev limiter said to be in the ignition box. When you hit that, it will cut the ignition until the revs drop again. During the time the ignition is cut, the engine will continue to inhale a combustible mix of fuel and air, and expel that mixture into the exhaust pipe. Then, when the engine speed drops enough, the rev limiter will allow the engine to fire again. The mixture in the exhaust pipe will ignite as soon as the first "fire" exits the exhaust valve. The result will usually be a huge blast. It's an old stunt used since, probably, the Model T - turn off the ignition for a second or two, then turn it back on to make a loud bang. It could still be the coil. If the coil is failing, but not completely dead, it could be opening up as it gets warm. It could be getting intermittent until it finally gets hot enough to quit completely. You could try making your resistance measurements while heating the coil with a hair dryer. It could also have gotten a bad spot in its internal insulation allowing it to arc internally under high throttle conditions (when the cylinder pressures are high and thus the required spark voltage is also high). That failure will not show up using an ohmmeter. The only real way to find out is the old substitution method of putting another coil on the motorcycle and seeing what happens. |
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Title: Re: Big exhaust flames Post by odvelasc on 11/24/09 at 17:20:13 76425042444358370 wrote:
Flame means you are too lean. Most likely a leak where your muffler connects to the pipe or your header where your pipe connects to your cylinder. |
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Title: Re: Big exhaust flames Post by Augusto on 11/26/09 at 16:16:23 [/size]LEMON SOLD...!!!! [size=10]thanks everybody for helping me out. Augusto. |
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Title: Re: Big exhaust flames Post by justin_o_guy2 on 11/28/09 at 09:38:38 Youll know how much of a lemon it was soon enough if the purchaser lives near you. If you see it on the road soon, then maybe it wasnt in such bad shape. What you gonna get now? Another Thumper? |
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