Mixture screw is stuck - any ideas ? (caution, more re-jetting mess)

[ohgood]

Any ideas how to get it moving again ? I've soaked it in PBBlaster for tonight, try again tomorrow.

Lunchbox + V&H full, 150 main, 40 pilot, 1 #4 stainless washer. Runs like crap, and I'm assuming it's because the mixture screw on ONE carb is stuck. The other is out 3 turns per the matrix.

Enlighten me gurus. 

[The Buddha]

I have drilled it on 1 bike ... I consider that a success but only cos I was very very very lucky and evidently I am the sorta guy who can rebuild a car motor through the exhaust pipe ... like the gynecologist who wanted to be a mechanic ... but I'd do so without waking up the car ...  ...
You must have heard my mechanic's "why you didn't hit it with a flower joke right" ... and the ever famous addendum to that joke ... "when you hit it with a flower, make sure you dont break the flower" all delivered with a mexican accent. Well, usually I hit them with a flower and fix the thing.
Cool.
Srinath.

[ohgood]

I have drilled it on 1 bike ... I consider that a success but only cos I was very very very lucky and evidently I am the sorta guy who can rebuild a car motor through the exhaust pipe ... like the gynecologist who wanted to be a mechanic ... but I'd do so without waking up the car ...  ...
You must have heard my mechanic's "why you didn't hit it with a flower joke right" ... and the ever famous addendum to that joke ... "when you hit it with a flower, make sure you dont break the flower" all delivered with a mexican accent. Well, usually I hit them with a flower and fix the thing.
Cool.
Srinath.

So the rough translation for 'flower' is 'impact driver' ? 

If I knew which size screw it used, I'd get a left hand bit for the tap size, spot it with the counter-bore size, then use the left hand to drill/pull out the screw.

I was hoping for something other than a drill.

[GeeP]

If I knew which size screw it used, I'd get a left hand bit for the tap size, spot it with the counter-bore size, then use the left hand to drill/pull out the screw.

I was hoping for something other than a drill.

Aww c'mon, pull out the drill index already!   

Hopefully, the other screw will come out so you can measure it.   

[The Buddha]

OK fine, english. The head if its nice and boogered, should present a fairly flat surface. You can get a 1/16 leftie drill and start by drilling it to a counter punch type depression. Then as you create yourself a nice divot, you can start putting pressure. Remember that bolt is very hard steel from being forged and machined into that precise shape and around it is very porus aluminum. You dont want to make a crooked hole or drill in too deep or ... anything ... just be careful.
Cool.
Srinath.

[ohgood]

OK, thanks guys. Like I thought there is no easy fix.

[GeeP]

It occured to me last night that the screw has a slotted head.  I'd be inclined to plunge off the slot with an endmill before going to the c-bore sized spotting drill. 

Just a late-night thought.   

[ohgood]

It occured to me last night that the screw has a slotted head.  I'd be inclined to plunge off the slot with an endmill before going to the c-bore sized spotting drill. 

Just a late-night thought.   

I've got a pretty good collection of center drills, so I was planning to spot it with whichever one fits the c'bore nicely. Now, if I can find a LH drill small enough to try and pull/drill it out.

BTW, the bike really really runs like complete crap with V&H full, K&N lunchbox, 1 washer, and two completely different mixture screw settings. I'm buying a couple new plugs today, in anticipation of actually getting the screw to turn.