studlock for butterflies.

can anyone confirm what type of threadlock is best to use for the carb butterfly screws,
I'm doing my carb clean, I have the throttle shaft seals on order, and would like to know if this would be adequate, its red in colour ,but has no information on the lable.



cheers
stu

 

it should work, just be sure not to use too much and let it run into the throttle shaft bores.

CN

 

That grade is listed as high strength and I'd use something medium strength instead. High strength will certainly do a great job of locking the screw, but I'd just worry about subsequent disassemblies.

Here's Delta's website with all their grades:
http://delta-adhesives.co.uk/products/anaerobics/

Can you get your hands on some of their #77 instead?

If you can't get something else and use the high strength stuff, just be careful not to twist the screws off if you ever have to take them out again. Heat is usually the recommended method to soften thread lock compounds.

 

Not sure if you can get this stuff over there but this is what I used.

 

The blue Permatex is medium strength for 1/4" - 3/4" bolts, it will be super-strength for smaller fasteners (like butterfly valve screws). For those you need the permatex "purple" low-strength threadlocker.

 

I've used the medium strength in this application with good (and removable) results. However, the purple (low strength) would, of course, be suitable, maybe even preferred.

Delta's low strength product offering, would be their #44.

And BTW, if you're more comfortable with Loctite designations (as I am), you notice the "Equivalent:" designation about halfway down each of Delta's detail pages for each compound... That's the Loctite equivalent number. For example, on the page for Delta #44, it says "Equivalent: 222". That means it's their equivalent to Loctite 222 which is the low strength purple grade.

No, I don't have anything better to do with my time...

 

I'll take that note.

 

I did not use any type of thread/stud lock when putting my butterflies on.
Am I in trouble?

 

Probably not. The Hitachi screws weren't peened over on the ends to begin with were they?

Mikuni screws are staked in place; the use of threadlocker is a better solution than trying to re-stake the butts of the new screws.

 

WHEW!
No they were not peened and the only 'oddity' was there was a varnish build up on them . . . imagine that, 33 year old carbs having build up.

 

thanks so much for the replies,
and thanks to rice burnarr for taking the time to look up the details.
I have a local bearing/seal supplier that stocks the delta products,
so #44 it is then
thanks all
stu

 

Glad to help. Happy riding!

Out of curiosity, Did you get the butterfly screws out already?

 

I got the screws out of the first carb ,and dismantled the carb.
the second carb, I filed the screw backs , and loosened the screws.
now I'm waiting for the seals to rebuild the first carb, before I dismantle the second one.
doing it this way ,so I don't mix the parts up, also if I get stumped, I can copy from a full carb.
cheers
stu

 

Gotcha. Good plan. Here's to hoping everything works out as intended.

Just in case you haven't been through something like this before... When it comes to getting the butterfly back in, get it located exactly where you're sure you want it with the screws installed but not tight. When you got the plate where you want it, tighten both screws without threadlock. Double and triple check the butterfly and throttle shaft location.

Then after you have quadruple checked the location, take one screw out while still leaving the other tight. The tight one will assure that the butterfly does not shift position while you have the other screw out. Put your threadlock on and then reinstall and tighten that screw. Then repeat the process for the other screw.

 

that's a good tip, rice,
my carbs are quite a bit different to what we're used to seeing on here.
the throttle shafts have a slot in that the butterfly slides into, then the screws go through the front side of the slot, then through the butterfly ,then screw into the back side of the shaft slot.
its a fairly tight fit and the butterfly has to be tapped (very carefully) into the slot.
but I will manouver it till its in the correct position.
then the studlock thing
cheers
hard to see here ,but there's a back half to that throttle shaft



stu

 

Maybe I'm misunderstanding something, but that throttle plate design sounds completely normal to me. Here's a couple shots of my Mikuni throttle plate screws. This is the engine side before taking out the screws:


This is the back side of the screws before filing off the peened section:


And here's the screws removed after the filing. Taks a look at the throttle plate in the background... Note the oversized holes where the mounting screws go through. The oversize nature is to allow for adjustability movement when getting the plate properly aligned in the carb throat before tightening the screws:


That's basically what yours look like, right?

 

yep, that's exactly it. its just that most of the "how to" tutorials on here seem to just have the butterfly screwed to the shaft, maybe they're all hitachi's ?
by the way ,why the middle hole?
stu

 

Never really thought about it... Not sure why the middle hole.

If forced to render an answer, I would guess that it's a locator feature used during manufacturing to establish positioning on one of the machining fixtures?

 

finally got round to completing the first carb, seals arrived studlock obtained
allpassages cleaned, and rebuilt



another problem arose with the jets, as I was doing the second carb, I found them mixed up , but I will start another thread for that
cheers stu

 

Cool. How did the jets look? Were they full of crud or were they not bad?

Reminds me to post my carb jet cleaning technique...