• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

spark plug lead pattern?

  • Thread starter Thread starter Anonymous
  • Start date Start date
A

Anonymous

Guest
Thanks to tips from this site, my 81 650e is back on the road.
The engine was dying randomly and suddenly.
I changed out the coils, and did a variety of other maintenance items while she was laid up. Even put in a speedometer cable and painted the old hoss. Amazing how much speed those two items add. ; )

The new coils seem to have done the trick re. the power loss. But here's another question.
Does anybody know the proper spark plug pattern? When I lifted the tank I discovered the left hand coil was connected to 4 & 1 -- with the leads crossing each other. The right hand coil went to 2 & 3 -- not crossed.

I reproduced this pattern with the new coils and she starts & runs much better now. Dependable at all speeds. But she still sounds just a leetle bit rough -- like a very minor timing problem. On a whim I uncrossed the 4 & 1 cables, switched them & ran the bike for a little while. Smooth -- it could be my imagination, but it seemed to lose the roughness. But I didn't want to run it that way for too long -- just in case. (Crossed up some spark plug wires on the ol' Studebaker once and blowed up a muffler.)

So where can I find out the pattern for sure? I don't see it in Clymer. And if the original coil was supposed to be crossed, does that mean the "Acme" coil I bought from Cycle Recycler should have it's leads crossed too?

Anybody know for sure?

8)
 
Re: spark plug lead pattern?

The left coil fires cylinders 1 and 4. It doesnt matter which spark plug wire goes to cylinder 4 and which one goes to cylinder 1. It also does not matter whether the wires cross or do not cross. You may place them which ever way makes you happy. :-) :-)

Earl


Tim Hudson said:
Thanks to tips from this site, my 81 650e is back on the road.
The engine was dying randomly and suddenly.
I changed out the coils, and did a variety of other maintenance items while she was laid up. Even put in a speedometer cable and painted the old hoss. Amazing how much speed those two items add. ; )

The new coils seem to have done the trick re. the power loss. But here's another question.
Does anybody know the proper spark plug pattern? When I lifted the tank I discovered the left hand coil was connected to 4 & 1 -- with the leads crossing each other. The right hand coil went to 2 & 3 -- not crossed.

I reproduced this pattern with the new coils and she starts & runs much better now. Dependable at all speeds. But she still sounds just a leetle bit rough -- like a very minor timing problem. On a whim I uncrossed the 4 & 1 cables, switched them & ran the bike for a little while. Smooth -- it could be my imagination, but it seemed to lose the roughness. But I didn't want to run it that way for too long -- just in case. (Crossed up some spark plug wires on the ol' Studebaker once and blowed up a muffler.)

So where can I find out the pattern for sure? I don't see it in Clymer. And if the original coil was supposed to be crossed, does that mean the "Acme" coil I bought from Cycle Recycler should have it's leads crossed too?

Anybody know for sure?

8)
Click to expand...
 
if the wires were really close together or touching they may have been crossfiring slightly.
 
Hi :lol:

The coils with 2 wires fires both wire at same time.Every time the pistons are at top.It is called (wasted spark) system.
A neat system ,but the spark plugs are eaten faster.
 
You must log in or register to reply here.
Back
Top