Tech Tip: Amal Concentric "Extended" Tickler Conversion
If you own an original Amal Concentric carburetor then you will know how annoying it is trying to press down on the small tickler plunger
Not only that, once you press the plunger gas shoots out and gets all over your finger...
Today I will be showing you how to install the new genuine Amal extended tickler lever assembly
It is a very easy conversion that takes no more than 5 minutes and requires only a basic set of skills and tools
The steps listed below worked for me, should you have a different approach, please feel free to use your own method..
Lets dive in..
Removing the original tickler (3 steps)
The original plunger is pressed on the end of the split-pin which may cause the plunger to be difficult remove
Removing the original tickler will require a good set of vice-grips and a soft mallet
Since we are using vice-grips, the original tickler plunger will be thrown away after as the clamping forces from the clamp will damaging the finish
Before you begin, use some duct-tape around the body to protect against damage should your mallet and vice-clamp slip..
Now that you have your supplies near and ready, the first thing to do is to clamp your vice-grip onto the top plunger assembly
Flip the carb upside down on a soft wood surface as shown above
Use your mallet and with a positive strike on the vice-grip jaw, you should see the plunger "pop" off
Once the plunger is removed, pull the split pin from the bottom of the carb
You have successfully removed the old plunger assembly..
Prior to installing the new extended plunger, I recommend that you debur and clean the inside bore
Use a fine rat-tail file and a bottle brush cleaner to remove any high-sports or debris
Installing the Amal extended tickler (5 steps)
Installing the new Amal extended plunger will be done in the following 5 steps below
First lets get out (and open) our new Amal 622/172 extended tickler kit
You should have 4 parts within the kit
- Body (with hole)
- Extended plunger
If for some reason (and it happens) that your Amal 622/172 kit does not have a small hole drilled on the body (see photo above) - please disregard it
Early Amal carbs have a hole on the side body while others don't..
This will not effect the function of the tickler
Should your Amal Concentric carburetor have a small bleed hole as shown above, it is vital that you install the body into the carb in the proper direction
Make sure the hole on the body is in the proper location and lines up with the existing bleed hole on the carb
If your carb does not have a bleed hole as explained further above, please dis-regard the orientation
Use your soft mallet to tap the body into the carb until the body is fully seated
If your carb does not have a bleed hole, install the body piece in any direction
Once the body piece is installed its time to finish up the conversion
Take the split pin and insert the pin from under the carb
You will find that the flare on the end of the pin will prevent the pin from pulling through the carb
Once the pin is in place, insert your spring over the pin and your extended plunger
Now that your plunger is sitting on the top portion of the split-pin, its now time to press the extended plunger on the split-pin
Mount the carb in a vice at a angle as shown above
We are using soft aluminium jaws to prevent any damage to the bowl gasket surface...
Make sure that your vice-jaws are on the split-pin and NOT the gasket surface
Start to draw-in or tighten the vice until the plunger bottoms out
It is important to keep the plunger "square" on the pin to allow the pin to insert the plunger straight and not at an angle..
Now that your plunger is installed, check to make sure that the plunger will compress and rebound smoothly without any binding or other issues
You can also test the tickler out by installing the float and bowl together (as an assembly) with the proper gasket in place
Flip the carb upside down and listen for the sound or feel of the plunger engaging the float
Need an Amal extended tickler conversion?
Should you have an original Amal Concentric carb with the older style tickler, now you can upgrade your carb to the new, extended type
The 622/172 tickler fits all of the following carbs and sizes shown below
|Carb Type||Bore Size|
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