MK 1 Amal Concentric Float Needle

[jms]

Hi
Just fit the newer “stay up” floats to my MK1 Amal Concentrics. I’m hearing that the brass Viton tipped needle should be exchanged for an aluminum one. Anbody have experience with this? Is it really necessary?

 

[marshg246]

Hi
Just fit the newer “stay up” floats to my MK1 Amal Concentrics. I’m hearing that the brass Viton tipped needle should be exchanged for an aluminum one. Anbody have experience with this? Is it really necessary?

I'm sure you will get many opinions. Amal switched away from the brass needle MANY years ago. Too heavy and may not seal as well.

 

[L.A.B.]

I’m hearing that the brass Viton tipped needle should be exchanged for an aluminum one. Anbody have experience with this? Is it really necessary?

Yes change the brass needles for the aluminium type.

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Setting Fuel Level on Amal Mark 1 Concentric Carburetters | AMAL Carburetters

Guidelines for achieving optimal fuel level in Amal Mark 1 Concentric carburetters. Covers fuel level measurement techniques, & more.

amalcarb.co.uk

"Needle Valve​

If your float chamber is fitted with a brass needle valve, you may find the valve sealing under its own weight, before the float has risen far enough to press it shut. Symptoms of this problem can be that the carburetter takes a long time to tickle, hesitates on pickup and does not idle reliably. A Viton tipped aluminium needle valve is now available that overcomes this problem. It is now fitted as standard equipment to all new Mark 1 Concentric carburetters."

 

[jms]

I'm sure you will get many opinions. Amal switched away from the brass needle MANY years ago. Too heavy and may not seal as well.

 

[jms]

Do you happen to know the correct Amal part # for the Alum? What’s amazing to me is the number of brass ones out there still for sale

 

[L.A.B.]

Shop our Light Weight Aluminium Needle Valve with Viton Tip | 622 | AMAL Carburetters

Light Weight Aluminium Needle Valve with Viton Tip

amalcarb.co.uk

 

[hhh]

It's crazy that Amal didn't consider the ramifications of altering the balance of the float weight vs. the brass needle valve. If you're really cheap you could calculate the difference and counterbalance with a weight attached to the float (if you could figure out a way to attach it. Epoxy?) Regardless, I don't see how it could affect tickling since that's going to depress the float a fixed amount no matter what the balance is.