1982 XJ650 Maxim Build

I got it out, had to hold the bottom part of the shaft with my finger to unscre the jet

 

The bit that the main jet screws into is called the needle jet (or emulsion tube). It needs to come out for cleaning as well. You push it out through the slide bore after removing the slide. Sometimes they stick, so a push with a wooden dowell or similar non-marring tool usually does the trick (I sometimes use a phillips screwdriver with a rag over the tip).

 

Thanks I got it figured out now.

Onto the next problem, I'm re-assembling carb #2 and I'm having issues with the throttle return spring. It's hooked on the carb and on the bracket that connects to the butterfly bar just like I did on #1 and just like the others but the spring keeps wanting to bind on itself and sticks the shaft and the butterfly doesn't want to snap closed.

 

Post some pics.

It is possible the butterfly itself is binding.
Is the butterfly in the correct orientation and position?
Did you lock down the butterfly prior to tightening the shaft on the outside of the carb?
(Ask me how I know this one . . . )


Try loosening the butterfly on the shaft and see if it makes a difference.

 

No I haven't even put the butterfly on the shaft yet

 

Here's pictures.

First pic its sitting right, I can move it with my finger.

IMG_1413 by Justin Schwab, on Flickr

But after rotating the shaft a few times it moves over and starts binding on itself and the carb body.

IMG_1414 by Justin Schwab, on Flickr

I can take my finger and just push it back over a little then it works fine for a few open/closes and then binds again.

 

That's set correctly. You won't feel the butterflies snap shut if you don't have them installed.

 

It binds up, I'll take a video to show you guys soon

 

Sounds good.

 

Put the butterfly on with one screw to show whats going on.

 

When you put the linkage plate back on how did you put the spring on? I think you overwound the spring. It's only supposd to be wound enough to get the linkag plate set up between the stops. Less than a full turn of the spring.

 

I tried that, it binds even without the plate in there. The spring is what's binding not the butterfly plate in the tunnel.

 

Read my edit. I missed what the spring was doing before.

 

Yeah, it's only about a 1/4 turn of the spring

 

Hmm... Try tweaking the prong that curves over the spring. What I think is happening is the spring is moving past it, instad of being guided by it. Bend it just a bit down toward the throttle shaft, and a bit in toward the carb body.

 

Are you sure that is the correct spring for the #2 carb? On the HSC model carbs, carbs #1 and #2 use the same spring, and those are made from a much thinner wire gauge than the "heavy-duty" #3 spring. If I recall correctly, the #3 spring will fit in place of the #1 or #2 spring, and such a situation might lead to the issues you are experiencing.

P.S. nice clean carb bodies!

 

^That was another thought I had, but it looks to be the thinner gauge wire.

Did you use a new E clip, or reuse the old one?

 

^^^ hear what they say.

To me it is very strange that the closing is not binding as tightly as the opening appears to be.

Suggest that you disassemble, verify you have the correct spring, then check all of the linkage components for burrs, flatness/ twisting, etc. Check the edged of the butterfly and the throats also. Follow up by securing the butterfly in a 'running condition' (both screws) finish by cracking a beer (or seven) and ask the question: "If I were this carb what would be my hang up?"

 

It's the right spring, well it's the one that came off this carb and its a lot smaller gauge than the one on #3.

Thus carb doesn't have an e-clip its one with a 12mm nut holding on a bracket on the other side There is a little play in the shaft back and forth when I tighten the nut all the way down, by a little I men like a 1-2mm at most.

I'm pretty sure this is whats happening, If I hold that spring over and under that prong it never binds. It's when it decides to move a little past the prong it goes bad. I may try and make some kind of spacer to hold the spring over under the prong and keep everything in line.

 

Thanks, I'm really enjoying my new ultrasonic cleaner.