• 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.

GS1000 misfiring dropping 2 cylinders

chandlerh2

chandlerh2

Forum Newbie
Hello to all My 1979GS1000 has developed a serious misfire . I have a dyna S ignition on it along with Vance and Hines header with racing baffle and pod air filters with a dynojet kit in the carbs .Bike has been running fantastic turn key and go . Sunday i rode it to brothers house was there for a hour . Got on bike fired up idling on all 4 cylinders and revved it and it sounded fine as soon as i took off and as i increased the throttle it started dropping cylinders cut back on throttle at low rpm's it runs on all 4 but as soon as i roll on the throttle it starts popping and drops 2 cylinders got it home put in a new set of spark plugs no change .. I replaced all the charging system about 2 months ago put in new stator and rectifier unit from Ricks electric also bypassed the circuit going through light switch bike reads 13+ volts when riding on the volt gauge i installed . Just tried to ride it again today and problem is still there but it certainly seems electrical . Where would you begin to look the Dyna unit or maybe a coil?? If its the dyna unit this will be the 2nd one i have had fail in a matter of a few years . I will put the good old reliable points back in . Any info would be appreciated .




64838135_2527052833980714_5586557905726865408_n.jpg?_nc_cat=110&ccb=1-7&_nc_sid=8bfeb9&_nc_ohc=8wWvzGcN77wAX-PPdYm&_nc_ht=scontent-iad3-1.xx&oh=00_AT-nf382p-AztnND6xgGhjCzqjd0KQ55xPgdwgCuuP7ffg&oe=62E00F40.jpg
 
May be a dyna pick- up failing.
Classic sign is cutting out as the load increases, also look for the white contact paste seeping from behind the suspect pick-up as that is a sign of overheating.
Duff coil can give the same symptoms but is easier to confirm or rule out.
Just switch the LT and HT leads to see it the fault follows the coil or stays on the same cylinders.
 
You must log in or register to reply here.

Similar threads

oldGSfan
Fired up dormant '83 GS1100E #2, getting close
Replies
4
Views
157
hhart
H
M
1168 cams gsx1100f /g/ b12
Replies
9
Views
194
slayer61
slayer61
K
Hanging idle troubleshoot help
Replies
18
Views
306
Naulty
N
SamLack99
1982-GS750T - Oh my Carbs!
Replies
9
Views
141
Rich82GS750TZ
Rich82GS750TZ
DimitriT
Weak idle until hot
2
Replies
31
Views
474
DimitriT
DimitriT
Back
Top