Hard Anodized Amal carb slides (2011)

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lrutt

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I have 2 single carb Triumphs and my Norton 850. They all are low milage and I'm thinking of switching the slides out now as kind of a preventative thing for wear. So all machines use 930 amals and all use the 3 1/2 slide. The triumphs are single carb and the noroton dual of course. But there is no distinguishment between a right and left slide. It's been a while since I've had an amal apart, are they slides such that the releif for idle adjust is on both sides of the slide and they can be used right or left on the Norton?
 
the slides are NOT handed like the bodies but not all bikes use a 3 1/2 cutaway.

lrutt said:
I have 2 single carb Triumphs and my Norton 850. They all are low milage and I'm thinking of switching the slides out now as kind of a preventative thing for wear. So all machines use 930 amals and all use the 3 1/2 slide. The triumphs are single carb and the noroton dual of course. But there is no distinguishment between a right and left slide. It's been a while since I've had an amal apart, are they slides such that the releif for idle adjust is on both sides of the slide and they can be used right or left on the Norton?
Click to expand...
 
lrutt said:
So all machines use 930 amals and all use the 3 1/2 slide. The triumphs are single carb and the noroton dual of course.
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An 850 Commando would normally have two 32mm 932 carbs, (however the slide would be the same type for 28, 30 and 32mm carb sizes, left or right).

http://www.amalcarb.co.uk/
 
bill said:
the slides are NOT handed like the bodies but not all bikes use a 3 1/2 cutaway.

lrutt said:
I have 2 single carb Triumphs and my Norton 850. They all are low milage and I'm thinking of switching the slides out now as kind of a preventative thing for wear. So all machines use 930 amals and all use the 3 1/2 slide. The triumphs are single carb and the noroton dual of course. But there is no distinguishment between a right and left slide. It's been a while since I've had an amal apart, are they slides such that the releif for idle adjust is on both sides of the slide and they can be used right or left on the Norton?
Click to expand...
Click to expand...

I should have said all MY machines use a 3 1/2 slide. So I'll likely be placing an order for 4 of these. I'm debating on changing the floats out as well. Everything is working well right now from that perspective.
 
Old slides with old bodies would wear on each other. Putting a good slide in an old worn body would not be wise. If possible, check the slide bore in the body so you know that it is in spec and round up and down.
 
On Trixie Combat I'd put on Ms Peels well used 7000 miles+ 932's which would not idle down to find the bores and the slides fluted with banging wear errosion. I put in the anodized slides with #3 cut out to compensate for the bore beating and got slow stable idle and maybe a bit nicer throttle response. If I wasn't so lazy I'd take the carbs off and beat on the bores with the slides inside to close up the air gap then
diddle the needles or float level if need be. Wise way is preventive replacement now but where's the funny interesting crying posting on that way?

If they made the carbs out of Al we be short changed a whole bunch of this.
BTW I've mentioned it prior but experts in metal casting have found the 932 carbs are a size beyond what the original casting methods can work for so they all come out the mold distorted even to the mounting flange right out the box brand new so can't claim every air leak there is d/t ham handed over tightening I hear each and every time as put down on those who encounter it. Back off attitude and take your own measures of new ones as I did to withhold my own reflex reactions. hobot

A common procedure by aged carb fixers is to place a sized dowel in bores and beat bores back round and tight to the slide space to carry on better after.
 
Put that money for new slides then add a bit more to have them rebored and resleeved in brass by a competent servicer. As the body will now be thinner you will need to take care not to overtighten the carb to manifold nuts lest warpage occur. This torque reading is low,use nylok.
 
I guess I've read that if your carbs are in pretty good shape, putting said slides in will help extend their life. These bikes all have less than 5k miles on each. Carbs show no signs typical for worn bores as in idle changing when you take up the slack in the throttle etc. It's hard to justify spending huge coin in brass slides or sleeved bodies at this stage. And given the amount of miles all the bikes share throughout the year, I'm not sure if they will hit that milestone for a while.
 
I've been toying at 13K miles whether to anodize slide or re-sleeve because I get the idle dip coming off the throttle from idle and irregular idle with Pazon Surefire. The price difference may be enough to try without loosing lots of bucks. How would one ever know?

Dave
69S
 
Hi Irut,

If the bodies look to be in good condition, I would put the Anodised slides in. I have fitted some and these slides and they are far more robust in condtruction than the originals. I have seen worn originals with a mark on nthe slide where it looks like the slide has swelled up as though it was being sucked into the engine. That is most likely why they eventually jamb in the carb. So I think you will achieve a satisfactory result and will prolong the life of your low mileage carbs.

Cheers Richard
 
In most cases worn carb bodies result in the slides wearing out too, so fitting new slides is a bit like fitting a new rear chain on sprockets that are completely worn out! Amal pushing these slides for use on existing carbs seems to be a very good indication of their understanding of engineering, and is pretty much the same thing as them not updating jetting for use with modern fuels, which I would think has already led to engine problems due to overheating.
 
Where are these anodized slides being sold (preferably in the USA)? I went to the Amal site but don't find them there and checked my local supplier (Rabers) and they don't carry these yet.
 
bwolfie said:
Email Amal, they are in the process of a website update and are not done yet.
Click to expand...

Thanks bwolfie. I have emailed them with no response and still their website says that they are real slow to respond almost like they're saying do you really want to email us.
 
Yellow_Cad said:
bwolfie said:
Email Amal, they are in the process of a website update and are not done yet.
Click to expand...

Thanks bwolfie. I have emailed them with no response and still their website says that they are real slow to respond almost like they're saying do you really want to email us.
Click to expand...


Emailed Amal last year asking when they would be amending the jetting on the carbs they sell to accommodate usage with ethanol type fuels (which require richer settings), and strangely enough got no reply! Followed the email up with a phone call, and they advised there was no need for richer jetting! I know someone who often sets up Brits on a rolling road dyno, and they often find there is a need for richer jetting, so I wonder why exactly Amal are still selling carbs with settings appropriate for 5 star leaded fuel, which ceased to be available in the UK more than 10yrs ago?
 
Well....I have 3 brit bikes that were all barn finds, 2 triumphs single carb models and an 850 commando. All had original carbs and settings. The ONLY thing that I changed on those carbs was the needle valve. All the rest left as is but cleaned. And they all run perfectly, no issues at all. So it may well be that for the most part, original jetting was rich enough that even with 10% ethanol there is no need for changes.
 
I get the feeling that Amal have little or no facilities for product R&D, and certainly dont have a rolling road dyno to check whether not jetting needs to be richened for use with Efuels, so just continue with the set ups arrived at when 5 star leaded fuels was common.
 
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