runs but not long

phsDommie · Jul 17, 2011

Just curious, Hershey, did you solve your "short run" problem? Hope you did, but if so, do you mind if we know what you found out?

Paul

hershey · Jul 18, 2011

phsDommie said:
Just curious, Hershey, did you solve your "short run" problem? Hope you did, but if so, do you mind if we know what you found out?

Paul

No I haven,t found the problem so far, Thanks for support Hershey

hershey · Jul 18, 2011

bwolfie said:
+1 on the cap vent, my yamaha did that to me. It was a bugger to figure out. But an easy fix.

I have plenty of gas to the carbs, problem is no spark, Thanks Hershey

hershey · Jul 18, 2011

phsDommie said:
I'm going out on a limb, here, and suggest that it might be fuel related. Unlikely as it may sound in an old Norton, the symptoms are very similar to what happens when gas stops flowing because of vacuum lock in the tank. If the vent in the tank cap is blocked, fuel will flow until the pressure in the tank is negative enough to stop the flow. After a few minutes, air seeps back into the tank and it'll flow just fine. As a test, try riding around your neighbourhood with the fuel tank cap unlocked - if it is the cause, she should keep on running.

Paul.

I,ll give it a try, Thanks for the info, Hershey

hershey · Jul 19, 2011

Well Guys I contacted the Boyer Bransden factory people and they are telling me I need a 1 ohm ballast resistor. They say the Boyer is a 4.5 ohm unit and the Accel coil is a 3 ohm unit. They say it is causing the black box to over heat and shutting down but I have felt the black box and it does not feel hot by touch. I ,am sure they know what they are talking about but I can,t understand why the bike ran perfect for over five years and now all of a sudden the Boyer and Accel set-up won,t work. I guess I,ll go ahead and install the resistor. The Boyer factory say they can supply one for around seven bucks plus shipping from England. Does any body have another source to buy a 1 ohm ballast resistor?? thanks for the help, Hershey

DogT · Jul 19, 2011

Did they mention the wattage, I'm guessing 5-10 watts? I have plenty of 1 ohm resistors from 1 to 50 W I can send you cheap, but I don't know your location.

Dave
69S

swooshdave · Jul 19, 2011

DogT said:
Did they mention the wattage, I'm guessing 5-10 watts? I have plenty of 1 ohm resistors from 1 to 50 W I can send you cheap, but I don't know your location.

Dave
69S

Wouldn't it be cheaper/faster to go to Radio Shack?

bwolfie · Jul 19, 2011

Have you been to the shack lately, it's not what it used to be, everytime I go in there I confuse the help.

DogT · Jul 20, 2011

You might find one at RS, but I doubt if they have anything over 1/4W. Option still available, I have them from 1 to 50W.

Dave
69S

hershey · Jul 20, 2011

DogT said:
Did they mention the wattage, I'm guessing 5-10 watts? I have plenty of 1 ohm resistors from 1 to 50 W I can send you cheap, but I don't know your location.

Dave
69S

Hi Dave, Yes the one that Boyer recomended is a 1ohm 25 watt. I would be interested in one if you have it, if you do I,ll send you my address. Thanks very much !! Hershey

MelloYellow · Jul 20, 2011

"Have you been to the shack lately, it's not what it used to be, everytime I go in there I confuse the help."
:mrgreen: :mrgreen: :mrgreen:
All they can sell these days is batteries! Find a good electronics surplus place.....
Mello

DogT · Jul 20, 2011

I can send you one of the 50 watt ones I have, double the wattage won't hurt, it'll fit in a small padded envelope, it's only about 2" long and 5/8" diameter. PM me with your address.

Dave
69S

hershey · Jul 24, 2011

batrider said:
It sounds like you mean the blue Lucas 2MC capacitor next to the battery. The warning light assimilator is usually under the tank. They are about the same size and both mounted on springs.

Also Hershey, I believe the 140403s are individual single tower coils of 3 ohms each so in series it is 6 ohms so no problem with that.

Russ

Yes, that is what I was thinking , twin towers = 6 0hms, but the Bransden people are saying the coil is 3 ohms and their ignition is 4.5 ohms and I need to install a 1 ohm 25 watt ballast resistor to make it work properly. I,am in the process of getting one from another member. I,am hoping that will solve my problem. Thanks for support Hershey

hershey · Jul 24, 2011

hershey said:
Hey Guys, I have a 1976 commando which I converted to Boyer electronic ignition, Accel coil (140403s) and electronic regulator. I have had this change over for about seven years and have had no problems with the bike, however out of the blue the bike will only run for about ten to fifteen minutes and it stops as if the ignition was shut off and no spark to the plugs. Leave the bike sit for a while and it starts up and runs as smooth as glass for another ten minutes. I thought something getting hot and shutting off, cools and works again.The first thing I thought of was the Boyer black box. I replaceed the black box and the coils at the points conversion. Didn,t help so I called the Accel people and they said it could be the coil so I replaced it and it still does the same thing. I also swapped out the electronic regulator which I didn,t think would be the problem and it wasn,t. Could it be the electronic ignition unit mounted beside the battery?? When it does stop I do have power to the black box. Does anybody have any suggestions as what could be doing this. Thanks Hershey

Okay Guys, I received a 1 ohm ballast resistor from a very generous member today, ( who I,ll compensate for) now I need to know where to connect it in the wireing harness. I presume it would interrupt the black wire going from the black box to the coil !! If not , where does it go?? One other question, Where do most of you place your black box on the bike?? I,ve been mounting mine underneath the main frame tube just behind the head steady spring mount. A good location for the wireing but I wounder about the heat from the engine!!! Any thoughts!! Thanks again Hershey

DogT · Jul 24, 2011

I am not familiar with the 850 wiring at all, but I would think it would go in series with the coil. If there's a wire that runs from the ignition to the coil, put the 1 Ω resistor in the line to the coil, but then I'm not familiar with the Boyer, it may have to go between the Boyer and the coils? I'm not familiar with the Boyer either. I'm sure someone will know, way too complicated for me. I only have a Pazon and 2 - 6V coils, no ballast.

Good luck
Dave
69S

Hobot · Jul 24, 2011

Black box analog Boyer 'wants' to see ~4.5 ohm load on its coil power path so shouldn't matter which side of coil, battery earth or Boyer + side it goes on. If you put more resistance in the trigger leads it changes the advance curve upwards, IIRC.

If there was much issue with brains near top of engine heat then there would not be so many 1000's of them done that way so permanently. W/o some special construction like maybe a pocket in gas tank, not much other sightly places to stick em. Tick is to mount so solid or so soft it don't abrade itself or paint.

Josh Cox · Jul 25, 2011

Stick it between the coils. Wire the joining ( the one between the two coils ) wire through the resistor ( in series with the coils, it doesnt matter how you wiring it, just as long as it is in series with your coils ).

Hobot · Jul 25, 2011

Yes if dual coils put resistor between them but I thought this case was a single dual fire coil.

hershey · Jul 26, 2011

Okay Guys, I e;mailed the Boyer people to see where and how to wire the ballast ressistor. Haven,t heard back from them yet, when I do I,ll let you know what they reccomend. Hershey

hershey · Jul 26, 2011

Josh Cox said:
Stick it between the coils. Wire the joining ( the one between the two coils ) wire through the resistor ( in series with the coils, it doesnt matter how you wiring it, just as long as it is in series with your coils ).

Hi, I have the single Accell supper coil with one black wire ( hot) and one red ( Ground ) running from the Boyer box to the coil. What,s the hook-up?? Thanks Hershey

runs but not long

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