1981 Yamaha XJ 650 Logo

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Anonymous
Anonymous Posted on May 02, 2012
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1981 maxim carb air/fuel screw

Factory setting air fuel mix screw

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  • Anonymous May 02, 2012

    im looking for the factory setting on 1981 yamaha maxim 650 carburator air/fuel mixture screw . 4 carbs , the haynes owners manual just says dont mess with them.
    but someone already has and i need to know what they were origionaly.

  • Anonymous May 05, 2012

    its under a little plate cylinder side of carb in front of butterflys called pilot screw

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Anonymous

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  • Posted on Jul 01, 2009

SOURCE: 1989 Zuma, just rebuilt carb to OEM specs, turned

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Anonymous

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  • Posted on Nov 22, 2009

SOURCE: Yamaha SR185 1981 carb settings

Righhttt And I need some new brain cells, stock jet size is .075 float level in 17/64ths turn adjustnebt screws in till they bottom out lightly then turn one and a half turns out andthat should get it to run, otherwise go to the nearest library and check out the book for that modle. there is another adjustment for the venturi plates but don't remember the exact proceedure.

tombones

  • 3567 Answers
  • Posted on Aug 11, 2010

SOURCE: needle adjustments for 1999 Suzuki RM80 Need carb

Lightly seat the screws then open up each of them one and one half turns. This is the factory setting.

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I have bought a 1981 Yamaha XJ550H Maxim The Idle was 4000Rpms, Since, I have replaced the Intakes, and Have rebuilt the carbs with new slide diaphragms and put new carb kits in the carbs, I have bought a...
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to much air when mixing with fuel in carb find air mixtur screw on carb an whale running turn in slowley till it stops backfiring turning the screw in adjusts the air mixing with fuel the screw is useuly located on the side of the carb witch the toub hooked up to put fuel in carb is
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I have a 1981 yamaha 550 maxim i would like to now what the factory air adjustments are on the carbs
one and a half turns out from fully screwed in.

keep in mind the bikes age,you will rarely find that the factory specs will be spot on after a bike has some years under it.
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Mar 23, 2011 • Yamaha XZ 550 Motorcycles
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The Bike was running fine then I removed the air box to install a set of pod air filters and now the bike wont run, are the carbs needing to be adjusted to compensate for not having the original air box?
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Feb 02, 2011 • 1983 Yamaha XS 400 L Maxim
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Needle adjustments for 1999 Suzuki RM80 Need carb needle setting for idle screw and air fuel mix screw.
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1982 yamha maxim 650 turns over but wont start battery is charged, turns over fine just wont fire up
you need to do basic diagnoses - 1 compression test,should be better than 130 lb and if in good order around 170 and all cyclinders within 14lb. 2 - check and make sure you have spark at all 4 spark plugs. 3- check and make sure you have fuel in carbies by undoing drain screw in each bowl, if above 3 all ok you probably have stale fuel and will need to remove carbs and clean out jets. this model also suffers from worn butterfly shaft through carbs which creates air leak and the manifolds to the head also leak and **** air.
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Jul 20, 2010 • 1981 Yamaha XJ 650
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How do I set the idle on my 1981 650 Yamaha Maxim?
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Jun 22, 2009 • 1981 Yamaha XS 650 H
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I hear talk of an air jet for the mukuni bs34 carb. I see a main jet, pilot jet, needle jet, air/fuel adjustment screw but I have no clue on where the air jet is located on this carb. I own a 1981 yamha...
I believe they are referring to the nozzle the needle goes into. A venturi effect is created by the position of the nozzle in the throat of the carb. The nozzle has holes in it and the fuel is sucked through the main jet and out the holes to mix with the rushing air as the needle raises. Beyond that I haven't got a clue.

Please rate this solution. Thanks!
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Jun 09, 2009 • 1981 Yamaha XS 650 H
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Flaot setting for 81 yamaha 650 maxim (4 ea.)
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May 30, 2009 • 1981 Yamaha XJ 650
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I have bought a 1981 Yamaha XJ550H Maxim The Idle was 4000Rpms, Since, I have replaced the Intakes, and Have rebuilt the carbs with new slide diaphragms and put new carb kits in the carbs, I have bought a...

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