SuzukiSavage.com - Carb Mod Trouble

Fido_the_Cat

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Re: Carb Mod Trouble
Reply #30 - 03/19/07 at 20:12:06

GeorgeKathe
I was reading your situation earlier this evening, (after posting here) and it reminded me of my own break-in period that after I got some mileage on the bike (got it with 450 miles), the backfire went away. Did my habits get more even and smoothe? Did the muffler break-in? I did change to premium gas till I realized that the only thing I was loosing was extra cash. But for some reason the popping and backfire was gone. I can not expalin your situation anymore that I can tell you what happend with mine. I did keep an eye on things that seemed loose, I dunno, I'm reaching now. I will try Lancers guide and keep your experience in mind making sure that I remember where I started and where my settings are.
I have been asking about using a tach to set the carb. (all together now) DUH!! DWELL METER. I know what it is. It has been sitting in my toolbox for many years. I asked how to connect it because I have in the past used multi meters to (blow) find bad circuits. Yeah I know I'm not lazy I just don't have the time or the extra memory space to remember what I read and how to apply it. If I can set it by ear I will try that. Thanks.

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Savage_Greg Serious Thumper Alliance Member Offline Don't go around your ass to reach your elbow... Posts: 7844 SW Washington State Gender:	Re: Carb Mod Trouble Reply #31 - 03/19/07 at 21:59:27 Many have never used a tach or dwell meter to set their carb to run correctly. Why do you think that you need to?
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Savage_Greg

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Re: Carb Mod Trouble
Reply #32 - 03/19/07 at 22:01:08

georgekathe wrote on 12/31/69 at 16:00:03:

fido - I started to follow Lancer's carb tip to get rid of backfire/popping but when I followed second part (where you turn the mixture screw out & engine is supposed to pick up speed & then start to slow) after almost 2 turns it did not start to slow, so I twisted throttle (what the heck, I thought!) & let it go & found I'd lost all backfire (actually on long ride today found out not all popping gone but gone most of time & when it did backfire occasionally it was not bad like before)

see my entry called "what did I do? (right!)" for full details.

hope this or following Lancer's tip all the way through works for you.

But what are you saying now that you didn't say before in the other post?

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georgekathe Ex Member	Re: Carb Mod Trouble Reply #33 - 03/19/07 at 22:20:39 nothing really Greg - just like hearing the sound of my own voice, I guess (also guess I like poking fun at myself, obviously!)
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Savage_Greg Serious Thumper Alliance Member Offline Don't go around your ass to reach your elbow... Posts: 7844 SW Washington State Gender:	Re: Carb Mod Trouble Reply #34 - 03/19/07 at 22:27:12 georgekathe wrote on 12/31/69 at 16:00:03: nothing really Greg - just like hearing the sound of my own voice, I guess (also guess I like poking fun at myself, obviously!) I was talking about the "not all popping gone" part...you didn't say that before did you?
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justin_o_guy

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Re: Carb Mod Trouble
Reply #35 - 03/20/07 at 00:27:00

LANCER wrote on 12/31/69 at 16:00:03:

Remember that you will not see any difference in the main jet size except in the 3/4-full throttle range.
Needle ... 1/4-3/4 throttle range
Pilot ....idle to 1/4 throttle range

There is some overlap of course, but that is the basics of it.

So, since I am really feeling the acceleration in the upper rpm range with the 1/2 spacer & the 150 main, should I get a tapered needle to stick in it? & maybe go to a 50 pilot?

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LANCER

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Re: Carb Mod Trouble
Reply #36 - 03/20/07 at 04:27:03

Fido_the_Cat wrote on 12/31/69 at 16:00:03:

Having said that, does that mean that the white spacer is the 1/4 to 3/4 adjustment? Is the popping that I have a lean fuel setting not getting burned off at decelleration?
Thanks again, I finally got the muffler mounted trhe way I wanted. Looks factory. Sounds Distinct!

Yep, shaving the white spacer is basically the same as moving the clip on a "normal" needle up or down to a different groove and it affects the 1/4-3/4 throttle range.
It is the pilot jet and it's "pilot air adjusting screw" that will affect the backfiring issue.
There is a write-up somewhere that describes what happens that leads to backfiring, where the carb is concerned. Exhaust air leaks can also do it but this is the carb side of the issue. When the fuel/air ratio gets too lean (especially on deceleration with the throttle closed) it does not burn properly and thus leaves some unburned. It collects in the pipe and after a bit finally ignites, giving the [glow=red,2,300] BANG [/glow] we all love and adore. Richening the mixture to the proper ratio enables a more complete burn which does not leave enough unburned fuel to collect in the pipe.
That is the quick and dirty of it.

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Savage_Greg Serious Thumper Alliance Member Offline Don't go around your ass to reach your elbow... Posts: 7844 SW Washington State Gender:	Re: Carb Mod Trouble Reply #37 - 03/20/07 at 09:05:46 LANCER wrote on 12/31/69 at 16:00:03: ... it's "pilot air adjusting screw" that will affect the backfiring issue. ... I'm glad that you made that distinction...
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LANCER Serious Thumper Alliance Member Offline Savage Beast Performance Parts Posts: 10661 Oklahoma Gender:	Re: Carb Mod Trouble Reply #38 - 03/20/07 at 09:12:49 OK
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Savage_Greg Serious Thumper Alliance Member Offline Don't go around your ass to reach your elbow... Posts: 7844 SW Washington State Gender:	Re: Carb Mod Trouble Reply #39 - 03/20/07 at 09:57:40 LANCER wrote on 12/31/69 at 16:00:03: OK I recently had that discussion with another member. That screw is often misunderstood.
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Fido_the_Cat Senior Member Offline " If you don't ask, They can't say no!" Posts: 300 Harrisburg PA Gender:	Re: Carb Mod Trouble Reply #40 - 03/20/07 at 17:57:24 Savage_Greg wrote on 12/31/69 at 16:00:03: I recently had that discussion with another member. That screw is often misunderstood. A misunderstood screw.... I've been enlightened.
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Savage_Greg Serious Thumper Alliance Member Offline Don't go around your ass to reach your elbow... Posts: 7844 SW Washington State Gender:	Re: Carb Mod Trouble Reply #41 - 03/20/07 at 21:56:06 Fido_the_Cat wrote on 12/31/69 at 16:00:03: A misunderstood screw.... I've been enlightened. I don't know. If you got to the other topic you might be bewildered...
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Fido_the_Cat Senior Member Offline " If you don't ask, They can't say no!" Posts: 300 Harrisburg PA Gender:	Re: Carb Mod Trouble Reply #42 - 03/21/07 at 17:58:21 LANCER wrote on 12/31/69 at 16:00:03: The [glow=red,2,300] BANG [/glow] we all love and adore? What'd I miss?
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