carb throttle shaft

[pat english]

how do i get the throttle shaft off on the round top carbs?..i got those lil half moon washer delios out and the shaft moves back and forth and spins,but wont come out.

[Piute]

  HAMMER time NO ! NO !
 L.O.L. I've only worked on key tops  No hammer needed

[shinyribs]

Strange.When you screw the dust cap ( wrong name) off mine the slide just comes right out.

Is your slide still in the main body? Just making sure i understand your question

[pat english]

hoed up..ill get a pic

[pat english]

this here..

[shinyribs]

Oh,that shaft.Yeah,mine wouldn't budge either,so I just left it. If you figure it out I'd be interested in how you did it.

[pat english]

its gotta come off..everything comes off

[TOOLS1]

Lucky is the only person that I know of that has successfully removed one with out damaging it.
TOOLS

[Lucky 1]

Those half round pieces are called woodruff keys.

If you have all of the bolts and screws lose it should slide out. you might have to use a wood dowel to tap it out. Do not tap on it with a steel hammer!  It would spread out and get so tight you would not get it out.

Support the parts well when tapping on the shaft because the lifter ams can break.
Tap the shaft with wood dowel in the direction shown while supporting the lifter arm.


Also when you get all those parts off, put them in a container of phosphoric acid overnight.
They should come out looking grey not rusty. Then rinse with water and spray all the parts with WD40.

The reason the shaft does not want to slide out is the corrosion on the shaft that is exposed .
Try to sand those areas so the shaft slides out easier.

Now for some ugly photos.


See all that corrosion on the steel shaft between lifter arms? That is why the shaft will not slide out.
Make sure to treat the shaft with phosphoric acid to treat and stop the corrosion.
Perhaps you can get a friend to help hold the lifter arms while you tap on the shaft with a wood dowel.

[pat english]

dang.thanks lucky..woodruff keys,theres a stop that i deliver to thats called woodruff.

where do i get this phosphoric acid you speak of?how about some hydrochloric acid real quick

ill post up some pics later of it apart.

[Lucky 1]

Hydrochloric is WAY TOO STRONG and then you have the problem of disposal and if one little drop gets in your eye you won't need to finish building the motorcycle. That acid just corrodes faster. It does not stop the corrosion.  You have seen the corroded battery trays on cars? right.


Phosphoric is easily available.
They sell it at paint stores.
they sell it at hardware stores.
West Marine sells it.
Some call it paint prep or metal prep etc.  Just read the ingredients. It is a green anti freeze color.
There is phosphorus in every living thing so if it is diluted with water it becomes safe.

But you can just save the old phosphoric acid in the proper type container and use it again.

Phosphoric acid turns rust (iron oxide), into iron phosphate and basically stops the rusting process.

[pat english]

right on.thanks lucky..ive used hydro on inside of tanks before..its dangerous..i got the shaft out fine tho.but i posted the pics on my build thread..itll be easyer for me to keep track of..

[shinyribs]

Hijacking again. The arrows on your diagram,Lucky. Will the shaft only slide out in that direction? Is it tapered?

[pat english]

its not taperd..it goes out either way.but i did take it out the way the arrows are pointing in luckys pic..

[shinyribs]

Ah,cool.Thanks. Showoff You just had to show me up,huh?jk

[pat english]

lol nah,im on my second set of carbs,i destroyed a bunch stuff on my first set..now theyre only good for parts.im not showing anyone up