stalling issue

britbike220

britbike220

Joined
Aug 6, 2005
Messages
1,211
I have a bike that if I am riding at any speed where the motor is under load dies when I pull in the clutch or shut down the throttle quickly to either downshift or stop. If I feather the throttle the bike doesn't die. It idles fine once at a stand still and generally runs great except the stalling problem. Any ideas what to look for to resolve this are appreciated.

Tim
 
What bike? What carb(s) fitted. This info will help.

Mick
 
Sorry, triumph t100r motor w/single 928 concentric 180 main, middle notch on needle, 106 needle jet and #3 slide.
 
Suspect classic pilot jet zinc oxide crust and also a failure of the ignition timing to retard with lowered engine rpm OR like I had do this on Peel once, the dang carb bolts got loose and would suck air in unless I held throttle open enough to suck the carb close to seal extra air out. It took me a while to find this by accident in shed just looking around to finally see no bolt and carb gasket hanging out a bit.
 
OH yeah had this another few times on Ms Peel that turned out she needed some level of hi engine vibration to keep enough connection going in broken smoke conductors, which also took me a while to figure out. Some times it was obvious in line with ignition wires by others was brake light wires grounding-shorting out, found only because the rough ground crossings bounced engine stalling with the bumps more than throttle relaxation.

After a decade or so getting Commando to work consistently you are qualified to advise NASA on its troubles.
 
I agree with Hobot that possibly you have 2 related issues - carb pilot is restricted with residue, and if the ignition is the original points, the auto advance unit is sticking and not returning to the retard position quickly enough. See Bushman's article on cleaning the Amal (on the home page) and check, clean and lube the AAU and also re-set the timing. Clean and re-gap the spark plug, or fit a new one. Check firmness of coil leads. A single carb T100 is sweet engine and should run very reliably.

Mick
 
I have already drilled out the pilot jet and modified with a set screw. the pilot jet is clean. Guitar string got any build up there may have been. I have a pazon ignition and it is timed with a digital timing light. So I'm thinking it has to be something else, probably simple, but I don't recall this happening on other bikes I've had. I was hoping it was simple someone else has experienced.
 
I had something similar, with the engine loading up on shut off.
Do the plugs look black.?
Check for Needle and Needle jet wear.
You might need new ones for comparison.
AC.
 
One thing a Commandoneer needs, ugh, among many other spares, is a hand full of fresh spark plugs and knowledge that they come bad right out the box, which I never ever in my life experienced but on Nortons, though I suspect its Brit Iron wide phenomena.

If not carb and not Pazion ignition then the fun begins to hunt for other things in combos till ya prove your manhood to be worthy of a road going Commando. Times like yours I so wished to be a baby and pay someone to take care of me, but alas not enough money nor experts around so stiff upper lip and begin complete inspection and dissections of everything you know can't be wrong. A voltmeter would help to see if gaps in the voltage along with the misfires or stalling. I have fixed or found some things by juvinile swift smacks and hard kicks, much to my peace of mind but lingering poor self image, eased by working lights and smooth running riding.
 
I have fixed or found some things by juvinile swift smacks and hard kicks, much to my peace of mind but lingering poor self image, eased by working lights and smooth running riding.
Click to expand...
That's funny, because in the troubleshooting trees for the Ford EECIV systems, they have what they called the "poke and wiggle" test. It's valid for all electrics actually, even though we laughed our butt off when we first saw it. (Especially since I worked for Toyota at the time!)

Mike
 
UGH - it can work both ways, creating another fault but at least the satisfaction of knowing the cause and location of the new one.
 
AussieCombat said:
I had something similar, with the engine loading up on shut off.
Do the plugs look black.?
Check for Needle and Needle jet wear.
You might need new ones for comparison.
AC.
Click to expand...

I thought I put all new jets and a needle in it when I went through the carb, but I'll certainly double check it.
 
Olephart.... We have a saying over hear,...
" I'd rather be an old fart than a young dick head. "
I'v been both.
AC.
 
I haven't had the time to take the bike out and do anything with it yet. I'm hoping to look at it again in the next week or two.
 
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