Late model Amal tickler question

Hi,
I have been recently working on a guys 70 Triumph which is equipped with a late model Amal 930. I notice that when I tickle the carb it doesn't puke gas like the Amals that came on my Commando. I checked to see that the tickler does in fact depress the float, but because it belongs to someone else I don't want to disassemble it any further. So the question is does anyone know if the tickler shafts on the late model Amals are somehow sealed so as to prevent the usual gas dripping?

GB

Damn the Torpedos ! Full speed ahead , disassemble that Amal! (The gas taps are turned on ? Start there and work downwards).

I bought a new pair of 932s. about 6 mths. ago.

I can confirm that the do indeed still "puke" fuel , just like the ones of old.

I bought some new Amals about a year ago & as supplied the tickler hardly moved the float so they were a royal pain in the ass to start from cold. I had to fettle them so that they moved the float a bit more. Still not as fast to fill bowl as old ones were.

Ian

Nortoniggy said:

I bought some new Amals about a year ago & as supplied the tickler hardly moved the float so they were a royal pain in the ass to start from cold. I had to fettle them so that they moved the float a bit more. Still not as fast to fill bowl as old ones were.

Click to expand...

Ideally, the tickler needs around 3/8" - 7/16" of movement, and anything less than 1/4" is likely to significantly increase the time it takes to flood the carb.
Lack of tickler movement is usually caused by the tickler pin being inserted too far into the button which can be adjusted by holding both parts carefully (with pliers etc.) and twisting the pin out of the button until the button moves the required distance.

I noticed on one Amal that the bell them formed on the tickler pin actually hit the edge of the float chamber preventing the float from being fully depressed. I had to trim that bell a little then all was well.

Unless there is a very strong flow of fuel into the float chamber the brass needle valve can seal under its own weight leaving the float too low to contact the tickler. Burlen introduced an alloy viton tipped needle valve a couple of years ago which solves the problem. They are standard in all the new carbs.