SuzukiSavage.com - Big exhaust flames

Augusto

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Big exhaust flames
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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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Big exhaust flames Reply #1 - 11/17/09 at 11:04:59 If the lash is too tight,, you need to fix that now.
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Yonuh Adisi FSO Serious Thumper Offline Savage Jedi (Knight) Posts: 3622 Pilot Valley NV, aka Tatooine Gender:	Re: Big exhaust flames Reply #2 - 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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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28651 Tucson Az Gender:	Re: Big exhaust flames Reply #3 - 11/17/09 at 17:28:05 Big flames?.... Neat!....
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BurnPgh

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Re: Big exhaust flames
Reply #4 - 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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Routy Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 2280 Winston Oregon Gender:	Re: Big exhaust flames Reply #5 - 11/18/09 at 05:54:19 Yeah!, how do I get the flames,....I have everything else !
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Boule’tard Serious Thumper ModSquad Offline Master of the Obvious Posts: 1620 Austin TX Gender:	Re: Big exhaust flames Reply #6 - 11/18/09 at 06:55:01 Routy wrote on 11/18/09 at 05:54:19: Yeah!, how do I get the flames,....I have everything else ! I expected Rocco to say that, you beat him to it
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T Mack 1 - FSO

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sold 2001 LS650 for
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Re: Big exhaust flames
Reply #7 - 11/18/09 at 09:41:46

Boule’tard wrote on 11/18/09 at 06:55:01:

Routy wrote on 11/18/09 at 05:54:19:

Yeah!, how do I get the flames,....I have everything else !

I expected Rocco to say that, you beat him to it Grin

Flames...... Shocked

Night time, in the dark, rev the engine and let off the throtle quickly to get a small back fire. Really neat blue flames Cool

. 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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Augusto

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Re: Big exhaust flames
Reply #8 - 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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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28651 Tucson Az Gender:	Re: Big exhaust flames Reply #9 - 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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Augusto YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 11	Re: Big exhaust flames Reply #10 - 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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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28651 Tucson Az Gender:	Re: Big exhaust flames Reply #11 - 11/18/09 at 17:39:56 Stock,.. US... 145# main/52.5# pilot.....
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T Mack 1 - FSO Serious Thumper Alliance Member Offline sold 2001 LS650 for a 1986 XLH1100 Posts: 2919 Emmaus,Pa Gender:	Re: Big exhaust flames Reply #12 - 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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Augusto

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Re: Big exhaust flames
Reply #13 - 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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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Big exhaust flames Reply #14 - 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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