I pulled the drain plugs on my new Amals and found this debris. I'm completely confounded as to how it all got there. Most of the shards are too large to get through the petcock and banjo screens. It looks like drilling dust. The only plausible theory I can think of is it got in the bowls while I had them apart for jetting. Seems unlikely I would be so sloppy. Can anyone think of another reason that would explain this? I wonder if any damage has occurred as a result. What an alarming thing to find in a brand new engine :shock:
Metal shards in carb bowl
- Thread starter Roadrash
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Looks like its these two ,
cyclegeezer
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850cmndo said:
Best pair of messages today, in my book.
I got a pair of new premiers the lefthand one had the removable pilot jet screwed in so tight it had sheared so you could turn the jet but the O ring held the screw head in. This I only found after much head scratching an trying to make left cylinder ideal an not spit back. I returned carb to Amal as I didn't want to try to remove broken jet an risk damage to body. They fixed it an returned carb to me but the point is just because the carb is new doesn't mean it may not have a problem after all they are made by hand an we all have the odd off day when we are at work don't we.
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that sounds like a fun shop!! :mrgreen:
Roadrash said:
I don't have new Amal carbs, I had the original ones sleeved years ago. I think it's pathatic that we still have to make excuses for original style components that are so authentic they still sometimes come with original style vintage British bike industry issues.
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Original ' S S ' Ducati's required Er . . . attention , from new .
Some Super Tigre ( and other specialised model competition ) Engines often had swarf / workshop ' dust ' internally .
However they were the SAME PRICE as the Mass Produced Jap Stuff . But of a higher ilk , IF you had the nous to refine a few asapects .
IF they had taken Four times as long , building them to fully blueprinted Hand Finished specs , in detail - the price wouldve doubled straight off .
This is why Hand Built Cars like pre war bentlys were expensive . And junk like LOTUSes were Cheap . The Lotus was a KIT , you did all that youself . And they STILL fell to bits .
:lol:
Some Super Tigre ( and other specialised model competition ) Engines often had swarf / workshop ' dust ' internally .
However they were the SAME PRICE as the Mass Produced Jap Stuff . But of a higher ilk , IF you had the nous to refine a few asapects .
IF they had taken Four times as long , building them to fully blueprinted Hand Finished specs , in detail - the price wouldve doubled straight off .
This is why Hand Built Cars like pre war bentlys were expensive . And junk like LOTUSes were Cheap . The Lotus was a KIT , you did all that youself . And they STILL fell to bits .
:lol:Biscuit said:
Maybe the brothers at Amal smoke beer and drink pot too.... wait....uh, anyway, I should probably clean the pilot jets with compressed air.
- anyone know if the plugs on the opposite side of the air screws are threaded on new units - and reusable if removed?
If yours new carbs are the premiere type the brass type screw on opposite side of body should simply unscrew (unless its like one in my earlier post ) an have an O ring to seal it. The screw contains the jet which on older type carbs was part of body an not removable
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"I should probably clean the pilot jets with compressed air. "
I learned a lesson recently that others have stated many times. Don't trust compressed air to clean out Amal pilot jets. I had suddenly developed an idle issue wherein adjusting the mixture screws was having no effect on one side. This occurred during a ride - the bike idled perfectly in the morning and on the way hope started popping at low rpm and stalling at idle. After checking other things I pulled the bowls (clean as a whistle) and the pilot jet screws and ran compressed air in the pilot jets. I put it back together and no change. I then took an appropriate diameter guitar string and cleaned both pilot jets. Problem eliminated!
The solution? learn to play the guitar!
I learned a lesson recently that others have stated many times. Don't trust compressed air to clean out Amal pilot jets. I had suddenly developed an idle issue wherein adjusting the mixture screws was having no effect on one side. This occurred during a ride - the bike idled perfectly in the morning and on the way hope started popping at low rpm and stalling at idle. After checking other things I pulled the bowls (clean as a whistle) and the pilot jet screws and ran compressed air in the pilot jets. I put it back together and no change. I then took an appropriate diameter guitar string and cleaned both pilot jets. Problem eliminated!
The solution? learn to play the guitar!
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