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xs650 > > Motorcycle Systems > > Fuel > > fuel float level |
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cosack54 Full Member
Joined: Jun 08, 2009 Posts: 24 Location: Lake County Ohio
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Posted: August 6, 2009, 4:29 pm Post subject: fuel float level |
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Hey Brother Bikers! I have a 1981 XS650SH with BS34 carbs. I recently put a jet and needle kit in it from "Mikes Xs". I will be fine tuning the carbs but I need to know where I should set my float heighth. I've read different settings from a number of people elsewhere but would like some input from the more experienced riders on this site. Any help would be greatly appreciated.
Thanks!
_________________ Try many different things! |
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jayel 650Rider Supporter
Joined: Apr 16, 2006 Posts: 3417 Location: SE Iowa 1974 TX650A
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Posted: August 6, 2009, 5:04 pm Post subject: Re: fuel float level |
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stock setting is 22mm± 1mm for the 81 this is measured from the carb body gasket surface a better method is seeing the actual fuel level with the drain tube and hose setup
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_________________ all it takes is time and money -- Where are we going and why are we in this hand basket? |
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Joseph Full Member
Joined: May 22, 2007 Posts: 767 Location: NY
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Posted: August 6, 2009, 5:32 pm Post subject: Re: fuel float level |
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Where can one get those bowl screw plugs for the 34's. Mikes lists some for the 38's, are they the same? Or maybe I'll just bring one with me to the hardware store and get something similar , a short bolt or something. I have been wanting to check my float level this way for a while. Should the bike be running when being done this way?
_________________ Joeymountain
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jayel 650Rider Supporter
Joined: Apr 16, 2006 Posts: 3417 Location: SE Iowa 1974 TX650A
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Posted: August 6, 2009, 6:09 pm Post subject: Re: fuel float level |
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not running , just gas on and in the bowl
_________________ all it takes is time and money -- Where are we going and why are we in this hand basket? |
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pamcopete 650Rider Supporter
Joined: Oct 10, 2008 Posts: 875 Location: South Carolina
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Posted: August 6, 2009, 6:51 pm Post subject: Re: fuel float level |
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Well, the BS34's do not have a drain plug. They have a spigot instead. You can just put the tubing over the spigot.
_________________ Ride.Enjoy.Life is simple |
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weekendrider Support Staff
Joined: Apr 20, 2007 Posts: 1284 Location: SW MO 2x83SK 79F 78E
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Posted: August 7, 2009, 2:29 am Post subject: Re: fuel float level |
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pamcopete, I believe the first year the 34's had the plugs.
You can screw 3/16's tubing in the thread hole without using a plug.
_________________ geocached @ N 37° 26.917', W 093 11.724, elev. 1148' |
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Joseph Full Member
Joined: May 22, 2007 Posts: 767 Location: NY
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Posted: August 7, 2009, 6:22 am Post subject: Re: fuel float level |
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Ya the 80's just have a plug and brass floats. I have seen the spigot on the later ones with plasic floats. I'll try the3/16 tubing method. thanks
_________________ Joeymountain
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cosack54 Full Member
Joined: Jun 08, 2009 Posts: 24 Location: Lake County Ohio
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Posted: August 7, 2009, 12:02 pm Post subject: Re: fuel float level |
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Thanks evrybody for your info. I'd like to try setting the floats as "jayel" suggested. Would I have to take the carbs off and level them in a vice or clamp of some sort? Also, I'm not 100% sure how to adjust the floats themselves . Do I bend the tang, turn a screw? As you can tell, I have delved into these carbs very little so I'm learning as I go along.
Thanks again
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jayel 650Rider Supporter
Joined: Apr 16, 2006 Posts: 3417 Location: SE Iowa 1974 TX650A
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Posted: August 7, 2009, 12:50 pm Post subject: Re: fuel float level |
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you can do it on the bike but it's a PITA since you will have to remove the bowl several times to get it right (if you get it right the first time go buy a lottery ticket, I get half), just holding the carb level in your hand is good enough "Do I bend the tang," YES... make sure both floats/side are equal/level...
_________________ all it takes is time and money -- Where are we going and why are we in this hand basket? |
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Joseph Full Member
Joined: May 22, 2007 Posts: 767 Location: NY
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Posted: August 7, 2009, 1:12 pm Post subject: Re: fuel float level |
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So being that I have a vacume petcock, if I put it on prime the fuel should be at top of bolw and not leaking out the airboxes?
_________________ Joeymountain
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xsleo Full Member
Joined: Oct 28, 2007 Posts: 1528 Location: Earlville NY
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Posted: August 8, 2009, 12:13 am Post subject: Re: fuel float level |
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Correct.
_________________ "You live more in five minutes on a bike than most people do in there whole life"
'75 XS650B with a 79 dual disc front end, rear disk brake, Chrysler reg, Radio Shack rect, LED tail/ brake and turn signals. |
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Joseph Full Member
Joined: May 22, 2007 Posts: 767 Location: NY
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Posted: August 11, 2009, 12:10 am Post subject: Re: fuel float level |
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Just spent hours getting this right with the clear tube, a few time I though I had it and left it on prime to check while I started cleaning up and they overflowed. Final nailed it though. Once I get the opportunity I am going to get new seats and needle valves. I am going to do the seat polish thing 1st though. My brass floats are bent every which way I would like a new set of plastic floats. Next job is stearing bearing service grease and check for acurate instal.
_________________ Joeymountain
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borjawil Full Member
Joined: Feb 17, 2009 Posts: 535 Location: east lansing, MI
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Posted: August 12, 2009, 5:23 pm Post subject: Re: fuel float level |
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is the fuel level in the carbs supposed to be at the top of the bowl piece where it meets the carb body or below that or above?
_________________ Fixing up a 1981 xs650 |
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Joseph Full Member
Joined: May 22, 2007 Posts: 767 Location: NY
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Posted: August 12, 2009, 5:41 pm Post subject: Re: fuel float level |
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Mine are set a bit above where the float bowl seats against the carb. Used about 4" 3/16 tubing threaded into drain of bowl and then went from that to clear tube.
_________________ Joeymountain
1980sg |
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