Carbs - Carburetors

inxs

xx
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CV Carbs - one of the best how-to manuals ive found for the original carbs

http://www.amckayltd.com/carbguide.pdf

VM Carbs - the same for mikuni roundslide carbs

www.amckayltd.com/VM34-36.pdf

Carb Basics - a quickie

http://star.walagata.com/w/sundialmotosport/C._Carb_repair_helpfull_hints.pdf

Carb Theory - a nice basic theory description for carb jetting

http://www.iwt.com.au/mikunicarb.htm

Mikuni VM - mikuni manual

http://www.mikuni.com/pdf/vmmanual.pdf

CV tuning...link for low rev and high rev motors

http://www.factorypro.com/tech/carbtun.html

A thread devoted specifically to BS34's as found on the XS650 80-84

http://www.xs650.com/threads/carburettors-from-the-grave.34737

- BS38-34 oem jet settings ... u.s
650carbspecsreducedsizeey7.png


- pilot jets
mikunipilotjetsmoddedam2.gif


- setting the float
XS650_Carb_Float.jpg
 
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Ironsled77

XS650 GRAND HACK
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Inxs I would love to see all the info you have on your computer! Keep it coming it is much appreciated
 

hawk

XS650 New Member
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I have a 1983 Heritage Special (USA) it has an idle sync screw between the carbs. It was backed all the way out. How do I adjust it so I can adjust both carbs idle from the carb on the left side?
 

Sundie

Jabroni
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get vacuum gauges on them, run the bike, turn the screw until they match.

If it's backed right off, the bike must not run very well, and vibrate like crazy.
 

xsjohn

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I didn't read all the post but.......Remember the sync screw only raises and lowers the right carb.......... left being controled by the idol stop screw..........

xsjohn
 

breahn riley

XS650 Addict
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What is the point of the plug for the pilot jet. From the illustration in lookslike it prohibits flow? What happens if you don't use the plugs?
 

xsjohn

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The BS34 has a closed circuit pilot jet.........the pilot jet feeds through the main jet.... if you leave the black plug off the main jet now becomes the side feet hole under the rubber plug and above the main jet............

You have to think of a ship full of these coming into port with the EPA standing there to test them......just think if they were in control of light aircraft...........

Good carbs but the jets and needles are epa...........everything suffers with that.......

xsjohn
 

xsjohn

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THe black plugs can dry out and not fit in snug......and be lost when you dismantle the carbs.......the bowl pushes the black plug tightly to the rim of the tower where they fit.......

It's good to make the timing on these TCI bikes adjustable too........they are a bit advanced......someone's wild idea to turn these wobbly 360 pressed cranks to 7K.....cringe.....and leave the lower rpms suffering..........

xsjohn
 
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