Topic: Stuck slide

[derelicte]

$#@#*@!

Reassembling the carbs after a thorough cleaning.  Slides all came out fine when I pulled them a few weeks ago, and all went in without incident today when reassembling.  Put them back on the rack and all of the sudden the first carb will not let the slide come up I can attach it to the linkage.  There is maybe 1mm of play and it will NOT budge.  Tried to hit it lightly with some WD after playing with it for over half an hour.  Do not want to force it and scratch it all up.  NOT FUN!  Tried taking the bowl and emulsion tube just to make sure the needle wasn't hanging up somehow.

Any tips or ideas? 

[harisuluv]

Most of the time the slides stick because of lacquer.  Sounds like yours were cleaned so probably not the case.  Sometimes heat helps.  I use pb blaster or wd-40 let that sit a few minutes then hit it with a hair dryer. 

Also, what kind of carbs are we talking about?

[derelicte]

They are marked 657b

[derelicte]

Also while I have the carb guru looking at my thread, how important are the rubber boots over each top cap?  Mind never had them, not sure if all 750s came with them.

[harisuluv]

Interesting that they would get stuck AFTER getting them apart. Almost like some debris got wedged in there?  You might have to pry on them gently.  You can use a screwdriver if you buffer against the slide with enough padding or shop towel between. Sometimes it is easier to get started with a twisting motion then you can try a little pry. If the slide goes up too far and you don't have a good angle anymore, flip it over and the side facing the head will be lower.  You need to be careful to not damage the slide because you can distort the edge when getting it unstuck but then if you get it almost out the flared edges from prying can keep it from coming all the way out.  In that case you might need to Dremel the edges and then replace the slide.

The rubber caps are dust caps. They just keep dust and dirt from accumulating on the moving parts of that linkage. Plenty of people run without them with no problems, plus a set of them go for about $60!

If you can't get it unstuck I can send you a whole #1 that is a common casting.

[alancop]

I had a simaler problem when I was attempting to rebuild my last set of 550 carbs, after much debating and #$%*ing around I finally poured just a little acetone down the top, freed that sucker right up, now be warned it will eat anything rubber, so it might be best to disassemble as much as possible before trying this trick.

[dave500]

it hasnt miscued the guide nub and jammed?,the type ones on 500/550s have a plastic or nylon guide nub,

[RSchaefer]

it hasnt miscued the guide nub and jammed?,the type ones on 500/550s have a plastic or nylon guide nub,

Yes I was going to say the same thing.  If use the real strong carb cleaner it will eat that slider knob up or if your thinking everything in there is aluminum, its not.