BritBike Forum logo
BritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorBritBike Sponsor SteadfastCyclesBritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorHepolite PistonsBritBike SponsorBritBike Sponsor
Upgrade to: Gold Membership | Premium Membership | Vendor Membership | Site Sponsor Membership
Words from our sponsors..
Vintage Motorcycle Auctioneers!
Vintage Motorcycle Auctioneers

CLICK HERE to see VIDEO
How the Electric Roller Starter works.

ORDER on eBay. CLICK HERE!
Buy your Electric Roller Starter here
ShoutChat Box
Comment Guidelines: Do post respectful and insightful comments.
Buy BritBike staff a coffee
Buy BritBike's staff a coffeeStill here since 1996 serving BritBike enthusiasts..
Search eBay for motorcycle parts in following countries
Australia, Canada, France, Holland, Italy, United Kingdom, USA
Random Gallery photo
Member Spotlight
Servodyne
Servodyne
England
Posts: 85
Joined: August 2013
Show All Member Profiles 
Newest Members
knobby, coomo, Chris mannifield, ruellarobson, bikerboy
11023 Registered Users
Top Posters(30 Days)
franko 138
koan58 68
DavidP 64
Rohan 51
Popular Topics(Views)
1,150,767 mail-order LSR
a word from..
Forum Statistics
Forums35
Topics68,980
Posts691,293
Members11,023
Most Online14,755
May 5th, 2019
Who's Online Now
50 registered members (Beach), 1,586 guests, and 1,006 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Page 8 of 12 1 2 6 7 8 9 10 11 12
Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143975 07/14/08 7:46 pm
Joined: Mar 2005
Posts: 10,329
J
John Healy Offline
BritBike Forum member
Offline
BritBike Forum member
J
Joined: Mar 2005
Posts: 10,329
"I finally after many many days of adjustments, rebuilds and beer changed out the carb. enrichining units with bar mounted cable operated ones. Turd no more ... "

The chokes can be rulled out by installing a blanking plug 2622/142 in place of the choke jet. This will quickly and once and for all rule out whether the chokes are causing the problem! It is a lot cheaper than buying a set of cable operated chokes.


Support Your #1 BritBike Forum!

Check out British motorcycles for sale:
British Motorcycles on e-Bay UK
British motorcycles on e-Bay North America
CLICK HERE to see VIDEO
How the Electric Roller Starter works.


ORDER on eBay. CLICK HERE!

Buy your Electric Roller Starter here
Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143976 07/14/08 8:18 pm
Joined: Aug 2005
Posts: 1,208
S
Steve in Tulsa Offline
BritBike Forum member
Offline
BritBike Forum member
S
Joined: Aug 2005
Posts: 1,208
I'm still waiting to hear about the chokes. I think I mentioned that a few pages ago.


Steve in Tulsa
Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143977 07/15/08 12:13 am
Joined: Nov 2007
Posts: 219
sawtooth Offline OP
BritBike Forum member
OP Offline
BritBike Forum member
Joined: Nov 2007
Posts: 219
can't do everything at once...carbs come off for another exploratory..then i wouldn't be able to road test the electrical fixes...the electrical fixes were completed this weekend (fingers crossed ; ) and tonight was plug chop night...

electrical problems are stabilized

so, here is what some of you have dying to see and those are the plug chops (as outlined by junior)

1. plug chops 1 and 4: original carbon fouled plugs from yesterdays test ride used for chop1 (idle until warm and down the street at low speeds to parking lot) where the headlight fell out.

pulled the plugs and they were completely carbon fouled (and re-installed the headlight)..

in fact , the plugs were so fouled that the left plug in the picture is a replacement done in the parking lot because it was so fouled it was misfiring..i changed the plug to a cleaned plug...did a few laps around the parking lot and chopped. the same plugs that were used for this first test (warm idle) were later used for the drive it like you stole it phase of chop 4.

after the idle warm chop the plugs were completely carbon fouled..and here is picture of those same plugs aftre a very short short drive it like you stole it chop

http://i35.tinypic.com/2nlbsph.jpg

after installing the headlamp and a brand new set of plugs i went on to plug chop 2

2. plug chop two was driving at 30-40 mph for 3-4 minutes..i chopped and here are those results

http://i36.tinypic.com/2d2c7y9.jpg

after plug chop 2 installed another fresh set of plugs and got up to cruising speed of 50-60+ (ie chop 3)

3. i was able to hold that speed for approx 1-2 minutes until the exhaust pipe fell off.

i immediately chopped and pulled over

having wired up the pipe with a piece of coat hanger that i found on the side of the road..i continued with plug chop 3.

i held the 50-60 mph speed for another few minutes and chopped

here are the results

http://i36.tinypic.com/2nqsm51.jpg

i re-installed the original plugs

4. ride it like you stole it phase with the original set of plugs (see results in chop 1) i wasn't able to keep the bike at WOT ...any attempt caused misfires and the bike ran erratically

so there you have it

i need to fix the exhaust

Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143978 07/15/08 12:52 am
Joined: Nov 2007
Posts: 219
sawtooth Offline OP
BritBike Forum member
OP Offline
BritBike Forum member
Joined: Nov 2007
Posts: 219
oh yeah..my new helmet for the year (fulmer) broke

Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143979 07/15/08 1:07 am
Joined: Mar 2007
Posts: 950
Swan Offline
BritBike Forum member
Offline
BritBike Forum member
Joined: Mar 2007
Posts: 950
Don't ask what else can go wrong.....


1966 Triton
1962 BSA DBD34 Gold Star
1966 Triumph Bonneville
Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143980 07/15/08 3:57 am
Joined: Sep 2006
Posts: 395
H
highway Offline
BritBike Forum member
Offline
BritBike Forum member
H
Joined: Sep 2006
Posts: 395
Yes, it true you can't due everything at once, but you have to do things in a logical order to get a logical conclusion.
The logical thing to do is eliminate to chokes as a possible source of the carbon, The lower the throttle slide is in the carb the more "SUCTION" is exerted on the enrichening circuit. If they close but don.t completely
seal the mixture is richened mainly at idle and low speed. Plug the freakin enrichening circuit.

Your wife????........DOES SHE EVER GET THE URGE TO SLAP YOU?

i'VE GOT A HEADACHE..... GOODNIGHT

Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143981 07/15/08 10:18 am
Joined: Nov 2007
Posts: 219
sawtooth Offline OP
BritBike Forum member
OP Offline
BritBike Forum member
Joined: Nov 2007
Posts: 219
I definitely agree that this nightmare must be approached systematically. And basically that is what I was trying to say ie one thing at a time.

Logically, eliminating the electrical was the first thing. Now we can focus on the carbs. But whatever happens with the carbs won't mean much unless I have the exhaust on the bike to test those changes.

My plan is to get working on the exhaust and pulling the carbs (and getting picts posted).....and going to the dentist and mowing the lawn and cleaning out the basement...taking the dog to the vet..and and and and ; )

My wife?? oh yeah I forgot about her...she isn't talking to me amd i am sure I will get yet another dirty look when I tell her I am buying a set of p=clamps so i can get that exhaust back on.

hey i managed to get the ladder out and change a light bulb..she should be happy right??

Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143982 07/15/08 11:47 am
Joined: Sep 2006
Posts: 395
H
highway Offline
BritBike Forum member
Offline
BritBike Forum member
H
Joined: Sep 2006
Posts: 395
254 posts... and still counting....stay tuned for page 5,

Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143983 07/16/08 10:58 pm
Joined: Dec 2004
Posts: 194
Peter Jones Offline
BritBike Forum member
Offline
BritBike Forum member
Joined: Dec 2004
Posts: 194
Hi,
Not read all the posts so what follows may have been said before but here goes... Been here before with my T140E. Runs fine now (touch wood, fingers crossed etc) on ordinary UK unleaded, runs better on "Super unleaded".

Didn't lick the problem until I backed off the ign. timing by 2 degrees. Went through all the carb mods (mine was originally set up as per US/EPA), new choke plungers, new needle jets (making sure they were cross-drilled) smaller choke jets (.25 to match pilot IIRC) and removing the "top hat" air jet. New HT leads (copper core) with non-resistive caps, changing from NGK to Champion, and finally a head-off decoke then a good thrashing through the gears once warmed up.

I believe it's a combination of things that build up to cause problems (modern petrol is very poor and causes more soot in carburated engines) I think it's well worth setting up right as these bikes run really well when in good fettle, and sound fantastic (I run peashooter/k&n to allow breathing)

Lucas Rita is fine. Make sure timig mark is accurate before strobing, and use another battery (ie not the bike's)

Ignition switch can be affected by vibration causing misfires (don't ask) :rolleyes:

Hope you get it sorted, if you can find one over there, a device called "Gunson's Colourtune" is worth its weight in gold, allowing accurate carb setup.

Good luck.

Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143984 07/16/08 11:39 pm
Joined: Nov 2007
Posts: 219
sawtooth Offline OP
BritBike Forum member
OP Offline
BritBike Forum member
Joined: Nov 2007
Posts: 219

Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143985 07/16/08 11:52 pm
Joined: Sep 2006
Posts: 395
H
highway Offline
BritBike Forum member
Offline
BritBike Forum member
H
Joined: Sep 2006
Posts: 395
Bottom of new plunger looks pristine in the picture, no trace of seating.
Reverse plug and pilot jet.

Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143986 07/17/08 1:01 am
Joined: Mar 2005
Posts: 10,329
J
John Healy Offline
BritBike Forum member
Offline
BritBike Forum member
J
Joined: Mar 2005
Posts: 10,329
Have you used the plug gages to check the needle jet?


Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143987 07/17/08 1:14 am
Joined: Sep 2006
Posts: 395
H
highway Offline
BritBike Forum member
Offline
BritBike Forum member
H
Joined: Sep 2006
Posts: 395
Viton looks pristine because the nose holding the viton appears to have a contact ring around it, and is larger in width.

Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143988 07/17/08 1:19 am
Joined: Dec 2005
Posts: 101
N
NZbiker Offline
BritBike Forum member
Offline
BritBike Forum member
N
Joined: Dec 2005
Posts: 101
Sorry you may have mentioned this
I had all sorts of trouble one plug fouling all the time backfire etc,etc I checked fuel.carbs off back on.ingnition electrics you name it
In the end it was one of the throttle slides
was hung up I think I had jamed one at some stage I sorted it out and all the trouble went away
I received heaps of great help from the guys on here.so the friggin around was not totally wasted as it increased my knowledge 10 fold
Hell I thought I knew everything (joke)


Cheers

John

Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143989 07/17/08 1:31 am
Joined: Nov 2007
Posts: 219
sawtooth Offline OP
BritBike Forum member
OP Offline
BritBike Forum member
Joined: Nov 2007
Posts: 219
highway: don't the plungers look different?
http://i35.tinypic.com/2m64meu.jpg

too me it looks ever so slightly longer (plunger) and it has a different profile....is this just wear?? or if there is a difference..doesn't it matter??

i confirm there is a contact ring

john: no i am sorry i havn't...i will sit down with everything tomorrow afternoon

sorry for the delay..not enough hours in the day..

i only took picts of the left carb...parts are identical..if further picts are required (of parts or other carbs) please let me know

broken tooth

Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143990 07/17/08 1:34 am
Joined: Sep 2006
Posts: 395
H
highway Offline
BritBike Forum member
Offline
BritBike Forum member
H
Joined: Sep 2006
Posts: 395
Well tooth whadda see. Your eyes are better than ours and the parts are there.


I had a tough, long, hot, sweaty day..... I've got 2 weeks of work to get done in one week... and then, I though of what it might feel like to be Mrs Sawtooth, day after day after day and I immediatley felt better, Rick
I STILL LOVE HA MAN! but it's guys like NZbiker we are doing this for.

Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143991 07/17/08 1:46 am
Joined: Sep 2006
Posts: 395
H
highway Offline
BritBike Forum member
Offline
BritBike Forum member
H
Joined: Sep 2006
Posts: 395
I TOLD YOU SO!

Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143992 07/17/08 8:23 am
Joined: Nov 2004
Posts: 973
A
az-idea Offline
BritBike Forum member
Offline
BritBike Forum member
A
Joined: Nov 2004
Posts: 973
We're looking at new and relic plungers..?..yeah,theyre different..the new should work despite differently radiused butt end..the relic is clearly a wreck where the seal should be and would appear to be a culprit as far as mystery rich running...but I believe the minor partner in this crime scene will prove to be rich pilot..both contributing,but..after seeing that plunger..I'd say youve got the main bugger in this saga of venal and epic sooting!!..the renegade chimmney sweeper and His Midnite getaway Pilot Moll are Made!!Horray for victorian crime busters everywhere!!..I Hope..

Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143993 07/17/08 9:42 am
Joined: Nov 2007
Posts: 219
sawtooth Offline OP
BritBike Forum member
OP Offline
BritBike Forum member
Joined: Nov 2007
Posts: 219
yes, new and relic..but the new has been in use for several weeks...with no change.

Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143994 07/17/08 12:55 pm
Joined: Mar 2005
Posts: 10,329
J
John Healy Offline
BritBike Forum member
Offline
BritBike Forum member
J
Joined: Mar 2005
Posts: 10,329
Az, I got caught by the new and old plunger until I thought about it. Mr.Tooth replaced the plungers a while ago and he was just showing you the old one next to the new one.

Yes Az, he has a set of 15 and 20 pilots in the bag and should put the 15 in and try it.

Also he has a new .105, .106, and a .106 with .037" bleed holes. I think I need to organize a .105" with .037" bleed holes as he hasn't made the switch to the non-EPA jetting. And a blanking plug so he can once and for all block off ALL FLOW of gasoline to the chokes so we can prove or disprove if the chokes are causing this problem. This would have been the first thing I would have done so I can eliminate one soure of the problem and concentrate on the carburetor jetting itself.

We have been getting good reports from people who we have had enlarge the cross drill hole a thousandths or so. Got a call yesterday from a dealer who opened up the hole to .037" and saw a marked improvment. That said he was experiencing a little richness and an occasional fouling, nothing like what we are seeing here.

Mr. tooth's fouling almost looks like someone is pouring raw gasoline into the mouth of the carburetor and nothing one can see fom the pictures can show that. Only examining and measuring the bits and testing at the throttle opening in question can do that.

By the way that pilot jet hole looks pretty big for this application. So please get out that screw driver and change the pilot jet before Az looses it all together...


Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143995 07/17/08 4:18 pm
Joined: Nov 2007
Posts: 219
sawtooth Offline OP
BritBike Forum member
OP Offline
BritBike Forum member
Joined: Nov 2007
Posts: 219
so what is my assignment before the next test??

measure needle jets, remove the top hats? install new pliots (15 or 20?), block chokes?

reverse the plug and the pilot jet? (i thought it was best in the bowl?)

lets do all this in the right order...so there is a clear, systematic resolution

standing by..over

Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143996 07/17/08 5:30 pm
Joined: Mar 2005
Posts: 10,329
J
John Healy Offline
BritBike Forum member
Offline
BritBike Forum member
J
Joined: Mar 2005
Posts: 10,329
I don't think moving the choke jet to the 2 stroke position will help in this case.

15 please


Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143997 07/17/08 5:56 pm
Joined: Jun 2004
Posts: 408
T
tomterrific Offline
BritBike Forum member
Offline
BritBike Forum member
T
Joined: Jun 2004
Posts: 408
I have #15 pilots and #25 enrichment jets. I'm not sure how far you have gotten toward the Euro jetting but remove the Air Correction jets too. The original #50 jets are worthless for anything so solder them up as plugs if you like.

I mentioned somewhere that your problem may be entirely or partly due to the too large straight through pipes. If you can get a 10 or 12 inch smaller diameter pipe into the end you will have higher performance, probably. Expand the ends of a 1 3/8" to fit. Also a bolt/pin put into the end of your pipes will help break up the reversion wave but I'm not fond of this bodge for big straight through pipes. A reversion cone at the port is a good idea too. The pipes will still give all the excessive noise you desire with these mods. Mufflers work well also.

Weird one. Have your floats gotten heavy with modern gas mixtures? Floats sink and raise the fuel level in the bowl. I would not freak about this but I'd keep it in mind.

Tom Graham

Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143998 07/17/08 8:09 pm
Joined: Dec 2004
Posts: 194
Peter Jones Offline
BritBike Forum member
Offline
BritBike Forum member
Joined: Dec 2004
Posts: 194
Aren't T140E's amazing ?

The MK2 Amals should be a better carb than Mk1s, and with the breathing sorted should work very well, however......

There's definitely a common theme here wink

In almost all the threads where this is discussed, it has not been straightforward.

My money's on the choke plungers. If you haven't already, rigging up cable operation rather than lever might be a good idea for choke operation, with a bit of free play. I don't trust the lever mechanism.

Re: 1979 T140E - Amal MKII - Plug Fouling TURD #143999 07/17/08 8:25 pm
Joined: May 2006
Posts: 176
JTsmks Offline
BritBike Forum member
Offline
BritBike Forum member
Joined: May 2006
Posts: 176
My original enricher's and lever have worked on my 79D since I bought the bike. Are you saying I shouldn't trust them? Damn, all this time I thought they were trustworthy! I'll go smack them with a hammer next. How dare they work fine in all this time, they were unaware they are supposed to be troublsome...please don't anyone tell them. wink


"All parts falling off this bike are of the finest British craftsmanship"
Page 8 of 12 1 2 6 7 8 9 10 11 12

Moderated by  John Healy 

Home | Sponsors | Newsletter | Regalia | Calendar | Bike Project | BritBike Museum | Spiders Cartoons | DVD- Manuals & Parts books
Upgrade to: Gold Membership | Premium Membership | Vendor Membership | Site Sponsor Membership
Powered by UBB.threads™ PHP Forum Software 7.7.3