New Amal Premiers need filing

I have to admit it would NEVER occur to me to check a jet size other than by what is stamped on it. IOW, I can understand (though not like) the fact that a pair of "matched" carbs might come with a 200 in one and a 260 in the other but having a jet stamped as a 260 that had a 200 opening...now THAT is really a PITA, especially since I don't have a handy Amal jet orifice measuring tool! (Is there such a thing?)

johnm said:

My "matched " 850 commando set had no interference issues.
But they did have a 260 main jet in one carb and a 200 in the other. Not mis-stamped. They measured 260 and 200 !

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marinatlas said:

Hi John, did you mean they were both stamped 260 and only one was measured as 260.......? the other is 200 !! not good , I know we must check them thoroughly before using , but ..........

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"Not mis-stamped" so one carb had a 260 main jet and the other had a 200 or at least that's how I read it.

All copy , that was me who did not read well , sorry about ....! hope Santa Claus will bring me a better pair of glasses and dictionnary..!

marinatlas said:

Hi John, did you mean they were both stamped 260 and only one was measured as 260.......? the other is 200 !! not good , I know we must check them thoroughly before using , but ..........

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L.A.B. said:

"Not mis-stamped" so one carb had a 260 main jet and the other had a 200 or at least that's how I read it.

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Sounds like a assembly issue doesn't it?

I too bought the new premiers for my T150, not impressed by quality control. 2 of the 3 carbs progression holes had not been drilled fully & sent back, also found a burr inside 1 of the slides where the throttle cable nipple sits which made the slide fit "higher" than it should.

marinatlas said:

Hi John, did you mean they were both stamped 260 and only one was measured as 260.......? the other is 200 !! not good , I know we must check them thoroughly before using , but ..........

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One was stamped 260 and measured 260. The other was stamped 200 and measured the same as other 200s I had. I checked carefully because a 6 can look like a 0 to old eyes in bad light. I just guaged them with drill bits which i know is not accurate enough but can certainly tell the difference between a 260 and a 200. Plus I had a range of jets to compare to from my 500 racing days.

So someone had built up a "matched set" with a genuine 260 in one carb and a genuine 200 in the other.

I can also now report I have had more issues with these carbs transitioning off idle. I changed the pilot from 17 to 19 and now 21 and I also change the slides to 3 from 3.5. The bike seemed awfully lean coming of idle and refused to take throttle off idle - even when warm. I also cleaned and guaged all the internal drillings blowing carb clean through everything.

It seems to be happy now.