Author Topic: Part Number needed - 1982 XZ550 Pilot air fuel mixture screw Mikuni BD34  (Read 97 times)

STV4Pair

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I've scoured the internet and this forum.

I'm sure the answer is there, but I can't find it - yet...

I don't believe the parts fiche shows it.

Does anyone have the current/correct/cross-reference part number for what I believe is called the Pilot Air Fuel Mixture Screw.

There is one on each carb, everyone says to have it set at between 2.5 to 3.5 turns out.  The "set" consists of the screw, a spring, a small washer and a small o-ring. 

Are these available as a separate purchase?  The Keyster rebuild kit has them but I'm having a lot of trouble finding them specifically sold separately.  If I can confirm the part number I'm hoping I can find them.

Thanks!
1982 Yamaha Vision XZ550 (project)
1984 Honda Nighthawk S CB700SC
2007 BMW R1200GS Adventure
2005 Honda ST1300
2014 Kawasaki Vulcan Vaquero (Wife's)

STV4Pair

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So no one knows if/how these can be bought separately or if they cross reference to another bike?
1982 Yamaha Vision XZ550 (project)
1984 Honda Nighthawk S CB700SC
2007 BMW R1200GS Adventure
2005 Honda ST1300
2014 Kawasaki Vulcan Vaquero (Wife's)

Prophet Of Doom

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  • The really perverted one amongst us
11J-14105-00-00 is all the parts as a kit
3H1-14147-00-00 is the O-ring
3H1-14962-00-00 is the washer
3F7-14134-00-00 is the spring, Air adjusting
3L1-14923-00-00 is the screw, pilot

It's the same item as used in Yamaha XJs and XS's that are fitted with a BS34 carb.  There are 3 available on ebay right now for $8.79

If your bike has any decent number of Km on the clock, then splash out and get the Keyster kits instead - jets and diaphragms are consumable items

STV4Pair

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Thank you!

I know what you're saying about getting the complete kit, its just more than I want to spend right now before trying a good cleaning (I think I did a pretty good job). One of the mixture screws head is pretty chewed up and won't take much more turning before the slot is completely gone.

The bike has 5785 miles on it - its just been sitting (indoors) the last 20 years.
1982 Yamaha Vision XZ550 (project)
1984 Honda Nighthawk S CB700SC
2007 BMW R1200GS Adventure
2005 Honda ST1300
2014 Kawasaki Vulcan Vaquero (Wife's)

George R. Young

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  • Vision rider from '84 to '03
Frugality.

Hacksaw the screw head slot a little deeper.

fret not

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  • Mike Lewis - Grass Valley CA
    • Michael Lewis Instruments
Well, sometimes a work-around can be good and sometimes not so good.  I say that it's good if you can make it work.  Otherwise, a good 'rule' is to "take whatever you want and pay for it".  Sometimes a direct approach is the most efficient, depending on time and money available. Good luck.
Retired, on the downhill slide. . . . . . . . still feels like going uphill!