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SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> carb mixture adjust screw /cgi-bin/YaBB.pl?num=1309470299 Message started by Jimmer on 06/30/11 at 14:44:59 |
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Title: carb mixture adjust screw Post by Jimmer on 06/30/11 at 14:44:59 Had a brain freeze. I know I ask this before, but just can't remember. When I turn the mixture screw into the body am I leaning the mixture or causing the fuel mixture to become richer. Thanks for helping an old guy stimulate his memory organ. |
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Title: Re: carb mixture adjust screw Post by bill67 on 06/30/11 at 14:48:34 Leaning |
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Title: Re: carb mixture adjust screw Post by Jimmer on 06/30/11 at 15:31:46 Bill thank you for the help. |
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Title: Re: carb mixture adjust screw Post by mattnovy82 on 06/30/11 at 16:01:42 does rich or lean fuel/air mixture make your pipes blue?? |
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Title: Re: carb mixture adjust screw Post by CalisOsin on 06/30/11 at 16:18:22 3B3722223839202F6E64560 wrote:
nope, they're generally pretty happy. ;) |
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Title: Re: carb mixture adjust screw Post by Serowbot on 06/30/11 at 16:20:32 5C5045455F5E47480903310 wrote:
Yes... Either,... ...a bad running, stumbly idling, engine will blue your pipes... so will a lot of other things... Excessive idling,.. riding in different elevations,.. traffic,.. hot weather... It's not so much a lean idle as lean in other areas that'll do it most... Just plain idling is more the problem with an air cooled engine... They don't get the air that way,.. and that makes them hot... heat makes pipes blue... Mine are as blue as you can get... ;D... ...and I'm not running lean... |
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Title: Re: carb mixture adjust screw Post by ralfyguy on 06/30/11 at 16:34:27 Then I wonder how to read mine: No discoloration, and I ride fast. Often superslab, like the other day it was 100+ degrees and I ran her WOT for 30 miles straight. And I do that often. |
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Title: Re: carb mixture adjust screw Post by Serowbot on 06/30/11 at 16:42:20 I think your pipe bluer is broken... ;D... Seriously,.. I'm not saying blue pipes are a good thing... It is an indication of heat, and too much heat too often is not good,... I'm just pointing out that a perfect running bike, under the right conditions, will blue the pipe , and it doesn't mean anything is wrong, or that anything needs to be fixed... It just means that it got hot... ... and once it's blue,.. it won't go away, until you remove it with some blue removing product..... changing jetting won't do it... Just like blue a pan on the stove.... when you turn the stove off, the discoloration of the pan doesn't go away... ... and... it's not a good way to judge how your engine is running,.. unless the blueing is noticed as a part of a change in the engines performance... No blue means your engine is never getting hot enough to make chrome turn blue... that's really good,... I've never seen a Savage here in Tucson that didn't have blue pipes... Only triple walled, cruiser pipes survive here without blue... ... or bikes that are hardly ridden... Mine actually went the blue black color that it is,... when the petcock failed, immediately after I bought it (used 3k miles)... So,... it blued from being rich... terribly rich... I just never cleaned it off,... 'cause I like it ... ;)... |
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Title: Re: carb mixture adjust screw Post by ralfyguy on 06/30/11 at 20:58:22 There IS a little hint of discoloration on the connection of the header to the muffler, on the muffler bottom, but NONE on the header itself. So I guess I got this machine running just about right. :) |
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Title: Re: carb mixture adjust screw Post by Serowbot on 06/30/11 at 22:49:03 Absolutely... and do you live in a location that's pretty flat and humid?... That keeps temperatures and air densities more consistent... |
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Title: Re: carb mixture adjust screw Post by ralfyguy on 07/01/11 at 10:24:16 7066716C74616C77030 wrote:
SE Oklahoma, hot and humid right now, humidity high in general. 800ft elevation, open air box, stock filter 150 main jet, stock 52.5 pilot, 2/3 washer, stock muffler w/ baffle removed, mixture screw 2 1/4 turns out, 15,500 miles, Rotella 5W-40 synthetic oil, occasional poof on shutdown, occasional afterfire. She still pulls very hard, despite the mileage. The washer mod made a heck of a difference in the mid-range, and opening the airbox demanded a 150 main jet, and after that, she runs better than ever. Especially in the higher RPM range at WOT there is a significant performance plus now. The removed baffle may have cut a little low end torque, but there is still plenty. But the gain in the high end is made it fun for me. She revs now like there's no tomorrow. :) |
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Title: Re: carb mixture adjust screw Post by Routy on 07/01/11 at 11:52:23 5F4C414B544A58542D0 wrote:
I wouldn't bragg about doing that if I were you. And if you ever post here complaining about a burnt piston or an exhaust valve that melted and went out the exhaust pipe, guess what I'll tell you ? There is no 4 stroke engine in existence (even water cooled) that is designed to take that kind of WOT abuse for 30 minutes straight,..... its just a matter of time for the engine to fail. At WOT, zero manifold vacuum, the combustion chamber temps are "white hot" |
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Title: Re: carb mixture adjust screw Post by justin_o_guy2 on 07/01/11 at 12:00:20 Routy, would you mind expanding on that a bit? I dont understand the Zero Vacuum part being a danger. If you could educate me in tht area, Id thank you. I wouldnt run mine that long Wide Open,, but for other reasons,, Fear is the first on the list. |
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Title: Re: carb mixture adjust screw Post by ralfyguy on 07/01/11 at 12:01:55 5A554F54484E5D5F57594E3C0 wrote:
I wouldn't bragg about doing that if I were you. And if you ever post here complaining about a burnt piston or an exhaust valve that melted and went out the exhaust pipe, guess what I'll tell you ? There is no 4 stroke engine in existence (even water cooled) that is designed to take that kind of WOT abuse for 30 minutes straight,..... its just a matter of time for the engine to fail. At WOT, zero manifold vacuum, the combustion chamber temps are "white hot" [/quote] Ok |
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Title: Re: carb mixture adjust screw Post by Routy on 07/01/11 at 18:43:13 0A151314090E3F0F3F07151952600 wrote:
Jog, What can I expand on,....except that at 75 mph I've seized pistons in motorcycles going into a strong headwind, and burnt valves in v-8s that were working hard.... running at near zero manifold vacuum (I'm kind of a vacuum gauge nut) What does manifold vacuum have to do w/ it,....not real sure, except that I know that if you back off WOT till you see at least 5 inches on a vacuum gauge, you are perdy safe as far as not having a meltdown. Somewhere it is known that combustion chamber temperatures runs less than 1/2 w/ 3 - 5 inches vacuum as w/ zero. A vacuum gauge is a good dash instrument for telling how hard an engine is working......as well as telling how to atain better mpg. But a vacuum gauge does not work well on a single cylinder like the ls650. Also, if you're gonna run an engine WOT for very long, thats when jetting becomes very important, and better not be running to hot a plug either, because when the tip melts off that plug, it can really raise hell w/ the piston ! |
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Title: Re: carb mixture adjust screw Post by RidgeRunner13 on 07/01/11 at 19:22:04 On a Savage running at or near WOT, there is not enough vacuum to the petcock to maintain maximum fuel flow, thus causing a lean condition & power loss. That is why before finally converting to the raptor petcock I ran the oem one in prime position. The last 2 Savages I've owned pulled my trailer & that combined with a strong headwind meant running near WOT a lot. Switching to 'prime' made an immediate difference. 8-) But maybe that was just me.... I could also always tell when I was low on fuel just by the way the engine would sound slowing down....... :) it would always 'pop' more. |
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Title: Re: carb mixture adjust screw Post by justin_o_guy2 on 07/02/11 at 06:55:25 18232E2D2F183F24242F387B794A0 wrote:
& That makes sense,, ! & then Routy Said What does manifold vacuum have to do w/ it,....not real sure, except that I know that if you back off WOT till you see at least 5 inches on a vacuum gauge, you are perdy safe as far as not having a meltdown & I had no idea,, & I want a vac gauge on the pickup,, Since the speedo died, I have to use a GPS, so, Ive got a tach up on the dash, a GPS on the windshield, positioned to hang right next to the Tach,, So, now I need a vac gauge slipped in somewhere,, hmm,,, Howmi gonn do that in a sanitary manner? Ill hafta figure on that a while. EDIT** Thanks for the replies. |
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