Damn flooding amals

[mike667]

Hey anyone have a similar problem - i notice sometimes when doing the priming thing w/ the monoblocks the gas keeps coming out of the overflow holes after releasing the plunger -  i know the float needle is stickin - but man it seems a new needle does nothing and i have had it repeatably in two different carbs now - sometime from just tuning the petcock on after leaving the bike for a few days the damn gas comes gushing out w/ out pushing the plunger down - damn amals!!! today it happened while driving the bike around caused gas to p*** everwhere (new carb too!)

ok i'm done  

[MG]

Hi Mike!

I assume you are speaking of Monoblocs?
What float needle are you using? The original brass one? If so, you might consider changing them for the later Concentric's needle which have a viton tip that works much better. It's a direct replacement and therefore a rather easy fix.
You could also check your floats for punctures or other damage. Amal now offers their so-called stay-up floats, made from some space-age foam stuff. Unsinkable they say (like the Titanic)  .

HTH, Markus

[rocket man]

hi mike i had a similar problem with mine the new one i have has a plastic float and what i found was there was flash still on the float where the two halves are joined together which caused it to stick i used some fine emery paper to get it nice and smooth put it back together
hay presto no more leaks hope this helps

dave

[chaterlea25]

Hi Mike,
There should also be a little tubular spacer (easily lost!!!!) on the float pivot
between the outer cover and the float,
If this is too tight on the pivot or too long it will make the float stick
Also have you the correct thick gasket on the cover?
Affects the above
HTH
John O R

[mike667]

thx for the suggestions guys - yes i have the new vitron tip needles in each carb (waz up Markus-trolling BSA forum?!) - i am going to take them apart and try cleaning the rough edges around the floats etc -  the unsinkable floats i believe are only available for concentrics  -  damn these things -  maybe a mikuni is in order!  

[flashblack]

If it`s the rough edge on the float, you will know when you take the cover off, as the float normally jams at the bottom (you should feel it wedging against the body inside)
  cheers Rich

[MG]

(waz up Markus-trolling BSA forum?!)

Nope, just didn't read the title attentively enough   

[beezalex]

 maybe a mikuni is in order!  

DON'T DO IT, MIKE!

Have you figured it out yet?  It has to be a hanging float or needle...or maybe a sticky tickler.

[mike667]

 maybe a mikuni is in order!  

DON'T DO IT, MIKE!

Have you figured it out yet?  It has to be a hanging float or needle...or maybe a sticky tickler.

Hey Alex
 well - i replaced the float and the needle, still does it so i am suspecting a sticky tickler, amybe not seating quite right etc... - haven't tried cleaning that yet -  the weather was so nice and a few friends showed up while mucking w/ it  so  i ended up just whacking the side with a screwdriver handle and drove it all afternoon - ah winter is coming to an end!

[zitman]

Now I had this on my A7. I had fitted one of the plastic tipped needles and it would regularly flood.  Talking to a local British bike guru he said I should either refit the original brass needle (suitable cleaned up) or get a new valve seat to match the new needle.  I refitted the original and it has been fine ever since.  He told me that over time the brass needles 'mate' with the valve seat and fitting a new needle seldom works as expected.

Z

[muskrat]

G;day Mike,
                    Did you see this topic http://www.a7a10.net/forum/index.php/topic,2847.msg19063.html#msg19063
Cheers

[andy2565]

i saw that lexan used on one of them chopper programs,they cnc'd it then warmed it with a blow lamp to make it clear,looked pretty cool,

[1660bob]

Surely this is why forums like this are so good.I went for a run today on my trusty,ahem, AJS 500, (well my A10 is a long way off completion). I went to start the bike at Devils Bridge after boasting to onlookers of its 100% reliability record and ,yep, you guessed it, in front of a small audience, it went all incontinent when i tickled the monobloc, a large pool of petrol under the bike before i realised -it was P---ing out at an alarming rate. Petrol off quick, rattle carb with screwdriver handle and normal service was quickly resumed.I took an almighty swing on the kickstart with throttle wide knowing it was flooded-she fired -and engulfed a lady sat on the wall behind in a dense black sooty cloud Tee Hee.
It has never done that in 5000 miles since I restored it (with a new monobloc)-but something had jammed the float, and i remember I had rattled the tickler with more gusto than normal when it flooded.Hmmmmm- had a delve when I got home and found EXACTLY the problem mentioned above- the plastic float moulding flash was catching on the carb body at the bottom so I cleaned it up with a little emery over a file and presto! problem sorted-came in all smug to report my findings here on the forum-and its all been discussed  before.... You cant beat pooling knowledge and experience.... Safe riding, Bob.