Carb disassembly problems

[jamestnewsonr65]

I was thinking of just drilling out the butterfly screw and buying new shafts as it feels like it is going to happen on the 2nd one also.

[livingdeadhead]

spark erosion - google it .

[montmil]

Dunno what is the exact cause of 'them sticking but I was told that mixing aluminium alloy and steel (particularly stainless) is not a good idea....
I do move them from time to time in order to free them. And have changed them many times since I bought the bike 30 years ago...

Mixing different types of metal in contact can create galvanic action.

http://archtoolbox.com/materials-systems/metals/55-galvanicaction.html

Bob Roller can confirm that this is a large concern within the aircraft industry. My personal experience was with the engine-turned and alodined aluminum cowling on my aircraft (I've always admired Charlie Lindbergh's  Spirit of St. Louis) that utilized stainless steel attach fittings. Dealing with the white, powdery corrosion was a constant chore.

[ShutterPilot]

Dunno if you're too far gone for this to help - a slurry that sounds like the grinding paste others recommend here, but already mixed in a little applicator bottle:
http://www.align-rite.com/screwgrab.html

Was featured in the May 2014 MCN

[Ed Miller]

Was at a DIY / Ace hardware store just today and spotted stainless 10-32 machine screws -for our Bings- with a cross-point, domed head. $0.44 each. Slather them with anti-seize and do as Georges says... break 'em loose every few months.

I just stopped at an Ace on the way to work and bought 4.  I'm surprised that Bing didn't use metric screws, though.  They're nearly a buck apiece!

[Bob_Roller]

The original screws are metric, the US size 10-32, is almost exactly the same as the metric size used, which escapes me right now .

[jamestnewsonr65]

Hey everyone, thanks for all the replies. I managed to get a screw remover and it worked a treat on the screws for the top caps. Th butterfly shafts were sacrificed in the removal of those, but I can get new ones from motobins here in the uk.

Onwards and rebuild! Also got the aluminium parts back from the boasters today, what a difference. Almost brand new parts!