Why are EC spec carb slides aliuminium and US ones resin?

[bikerboy7]

Why are EC spec carb slides aliuminium and US ones resin? Are they interchangable?

 

[Oldbikefixr]

I have a 1991 and a disassembled set from a later 1100. By slide, you mean the part with the flexible diaphragm attached? That's metal on both sets of mine.

 

[bikerboy7]

Yes thats the part. Are your carbs both from the US?

 

[TourNut]

You don't want aluminum slides , sliding in aluminum slide throats . metal against metal gauls the throats so they start to hang up & not slide properly for smooth engine performance - ruins carb balance . had first hand experience with this on my '76 GL-1000-LTD ; in ~20K miles , ruined the bike's performance that was otherwise a great MC , but miserable Kehin bad design early carbs.

 

[Oldbikefixr]

Yes thats the part. Are your carbs both from the US?

Yes, both sets. Checked the disassembled slides from the 'new' set. They're metal, not aluminum. Didn't check with a magnet.

 

[bikerboy7]

Wounder why Honda made some from plastic? Thought they were for US market but obviously not. Any info appreciated.