BS34 EZ-Adjust mixture screw

DogBunny

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http://www.johnscycleparts.com/store/index.php?route=product/product&product_id=50

Stumbled upon this.
Looks like it would work on our BS34s, but it's kind of spendy. Maybe a member can start making them, or maybe someone has a similar DIY idea.
 
I just have a 1/4" socket-type driver holder in my pocket with small flat-blade bit. It's there right now as a matter of fact. On the XS it's sufficient, although I can't remember last time I needed it. On the CB550 it takes some jenga skill to adjust the things when the engine is hot, gloves make it impossible. So I wait for it to cool (read: forever), adjust, then test. Takes a while to dial a good idle :)
 
The bs34's on my xs750 has them. Not sure if they are 34's but there almost identical.
 

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I also have a set of those same BS34s. You will notice that the mixture screw is different from XS650 mixture screws. In your picture, you can see -- the XS650 screw is stepped, while the other screw is tapered. The hole in the carb body is also different, so they won't interchange. I have no idea what bike those carbs are off of, could be any of dozens Suzukis or Kawasakis.

Makes me further wonder about the EPA requirement to plug the mix hole access on 1980 and later XS650s, because I think the those BS34s in your pic are from the same time, and they are not plugged.
 
When I did the carb reworking on my Harley, that screw was one of the things I did.
I got my kit and extra parts from the guy that designed and builds them.
CV Performance. A guy called Kenfuzed on biketalk.com is the designer.
It does make mix screw adjustments easier. But how often do you really need to adjust the mix. Once set you don't change it unless you change something else.
Leo
 
i have 82 650 rebuild 1st over pistons brandson ing and hughs 200 pma i think stock bs34 carbs, choke stalls engine right cylnder running hot any ideas on rebuilding carbs making them not so lean who sells best kits etc
 
If you expect someone to go to the time and trouble of helping you, then you should put a little more effort into posing your questions, do a better job of describing your problems, and avoid hijacking other's threads.
1st over pistons brandson ing and hughs 200 pma has nothing to do with getting your carbs to run right, but knowing what has been done to the carbs, if anything, and what jetting and intake and exhaust you have do.
Read the carb guide in the tech section.
 
I would suggest that you read the carb guide, www.amckayltd.com/carbguide.pdf This will help you ID your carbs. Once you ID them, then tear them down, clean, inspect.
The carb guide tells how.
Once you determine, by inspecting, what needs to be replaced, then buy just what you need. Often just a float bowl gaskets, O-rings. Most kits come with a bunch of parts you can't use.
Once you get the parts you need, reassemble the carbs with the new parts. Adjust the floats, bench sync, idle mix screws. This should get the bike to run well enough to fine tune the carbs.
Leo
 
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