• 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.

Wonky throttle

timebombprod

timebombprod

Forum Sage
Back here again....


Lastnight I got the bike put back together with all new rubbers and had all four coils sparking blue. Idled great but it was a bit higher than it should be, and my issue if the idle rising up after some throttle was gone.

This morning I went to start the bike up and it could not idle by itself on the same setting as lastnight so i had to turn up the idle, eventually sitting a bit lower than it should. Guess what came back, that hanging idle, and now my bike likes to jerk itself while sitting at 2500rpm about. Also that inconsistent skip is back.

What the heck do i do
 
I'll add that lastnight the vacuum line wasnt hooked up and was blocked off, and I forgot to put the breather valve on the valve cover. Other than that theres no difference in lastnight and today
 
?now my bike likes to jerk itself while sitting at 2500rpm?

did it have this jerk problem before you changed plug wires?
 
Gonna block off the vacuum line and see if that changes the bikes attitude.

It seriously ran great with no issues lastnight. Morning after is always the real test but did fully hook it up lastnight after I ran it, so I didnt get to see if anything changed between that.
 
Unplugged vacuum line, blocked it off. Had better response for a little while, and a higher idle than usual like lastnight.

What I did notice is that I think it's only when the bikes warm itll do that idlerise, and eventually it will go back down, can this involve jet sizes?

Keeps having that slip more commonly now so the engines seemingly is on it's way to die. Gonna end up checking this battery to see how its held up the 1 day it's been used.


The only difference I had lastnight that i haven't set back to how it was is I had my carb sync tool hooked up, now the holes are set with it's original components.
 
I am just thoroughly amazed that lastnight I had a great running bike with no issues and today I'm back to where I basically was.
 
Okay so, back here and I'm guessing now it has to do with the carbs leaning out.

I can get the fuel mixture screws set correctly to where I have a great steady idle, but I still do get the hanging idle no matter what. Also if the bike deaccelarates fully you can hear whatever it is turning off, because it's not a straight drop back to idle but a constant deaccelaration.

Pilot jets have been brought up from 42.5 to 45, the main jets have been brought up from 100 to 110.

The issue will not happen if the bike cant sustain its idle by itself and I'm holding my hand on the throttle, but will always happen if the bike sustains itself at idle.

Only seen the rpms go up to 4k by itself, have had it go higher but only once never again.


What part of the carbs should I be messing with? I know its low speed but which jet should I probably be tuning?
 
Last edited:
It's about quarter throttle when it happens.


Still having that inconsistent skip, I think the R/R or ignitor is shorting.

Had a choppy throttle for a little while but soon returned to a normal one, and when that happened, so did the short.


I've used a testlight on my ignitor checking the negative and positive wires that run from the timing setup and both had a negative light turn on.
 
Last edited:
? I think the R/R or ignitor is shorting?

disconnect the charging system and find out. If you replaced spark plug wires by digging out old ones from ignition coils , that would be my first suspect for random misfiring
 
tom203 said:
? I think the R/R or ignitor is shorting?

disconnect the charging system and find out. If you replaced spark plug wires by digging out old ones from ignition coils , that would be my first suspect for random misfiring
Click to expand...

Leads are not the issue if that's what you're saying, already done the swap test. Really hoping it's a bad connection but it would have to be resolved by taking connections put of plugs and such.
 
You must log in or register to reply here.
Back
Top