• 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.

First Start Since 2008

  • Thread starter Thread starter TheYukbob
  • Start date Start date
T

TheYukbob

Guest
I got my project bike running today and had a few questions.

1. I've got two vacuum hoses that come off little tees from the carburetors, where do they go? I currently just have them hanging, and the bike ran. I've already got the third one off of carb #2 going to the petcock, so I have no clue where these other two go.

2. I've got two hoses, one coming off the top and bottom of the plastic intake manifold, where do those route to?

3. Based on the video, does the bike sound ok? I'm sure I need to screw with the mixture adjustment, but it sounded more like an angry lawnmower to me, was wondering if that was normal...

4. And lastly, at 5k RPM I only got 13.5V on the battery, is that enough to charge it or should it be higher?

Here's the link to the video of it running.
https://youtu.be/Y0pzXrRbnRU
I know you're not supposed to rev it when cold, but I got really excited. You can see me checking the multimeter throughout the video.


Be gentle, I'm new at this. :)
 
Last edited:
tom203 said:
As to 1.. Look at pic in this link
http://members.dslextreme.com/users/storagecliff/images/hose_locations.html

as to 2.. Hose off top of sirbox goes to camcover top. Hose on bottom is a drain hose (has an odd fitting in it)

for 3.. My hearing stinks and I hate to hear tortured sounds- others will comment

for 4.. Your charging is poor, so welcome to gs charging fun with endless info start here

http://www.thegsresources.com/_foru...System-QUICK-TEST/page2&p=1272192#post1272192
Click to expand...

Thanks for those links, I've got it routed correctly now, I figured out the lawnmower noise is coming from cylinder #1 not firing, the pipe is ice cold while the others are 100?F. Any idea why it's not firing? What should I check for?
 
Cylinder 1 not firing and pipe is cold. I would think that the carbs need a good cleaning. Something is blocking the carb. Basscliffe's website carb tutorial for info on taking them apart and re assembly. Someone in your area might have a sonic cleaner available. I used the dip cleaner but the sonic cleaner did the job much better. Some shops have this service available and there is someone on this site that does it as well.
 
Ok here's an update, got all cylinders firing by switching the plug wires, I don't remember taking them off but I guess I did and put them back on wrong.

1. Carb #2 is filling with fuel and is spilling everywhere. I took the carbs off twice to check the needle and seat for blockage, it was clean both times, what else could be causing this?

2. Bike will start immediately but then climbs revs very quickly and doesn't stop, I got scared and shut it off around 7k when it started climbing faster, is this related to carb #2 overfilling?

Also my bike is on the center stand if that makes a difference.
 
Last edited:
Carb #2 over filling with the engine running can only be a float valve related issue. Either the valve is bad or the float is hanging up on the bowl gasket. I'm assuming that it doesn't leak fuel until the engine starts. If it leaks before that, then you also have a bad petcock. Have you tried to give the #2 carb float bowl a rap with a hammer to see if it will close the valve? You need to get this fixed before proceeding and keep an eye on your oil to make sure no gas is getting into the crankcase.

As for over revving, do you have the choke on? Does it still rev with the choke off?
 
It overfills even with the bike off, I think it's related to my float height so I'm going to check that in a second.

Thanks for the tip on gas in the oil, it's completely full with gas and I'm gonna change it today. I'm currently running the bike off of an auxiliary fuel tank because my actual one is full of rust, so no petcock. Is that bad?

Lastly, it over revs with the choke on or off, tried it both ways and still revs like crazy.

Thanks for your speedy reply as I go back to school on Wednesday and want to get as much done as possible.
 
TheYukbob said:
It overfills even with the bike off, I think it's related to my float height so I'm going to check that in a second.

Thanks for the tip on gas in the oil, it's completely full with gas and I'm gonna change it today. I'm currently running the bike off of an auxiliary fuel tank because my actual one is full of rust, so no petcock. Is that bad?

Lastly, it over revs with the choke on or off, tried it both ways and still revs like crazy.

Thanks for your speedy reply as I go back to school on Wednesday and want to get as much done as possible.
Click to expand...

If it over fills with the engine off and the petcock is not in the prime position, then your petcock is also defective. Fuel would not flow to the carbs if the vacuum operated petcock didn't have vacuum to open it.
 
I'm using an auxiliary gas tank so there is no petcock, shouldn't the floats shut off fuel to the bowls even if the petcock is defective or non existent in my case?
 
If your auxiliary tank is too high above the carbs, the extra gravity flow to the carbs will overcome the float valves.
 
Alright, good thinking, that was my issue.

Now a new issue popped up....

I turn the bike on and it immediately revs sky high. There's no air leak in my intake boots, my throttle isn't stuck open, and my mixture is definitely not too lean at 3.5 turns out.

What am I doing wrong?
 
Any have ideas as to why the revving is happening? What I know is detailed in my last post.
 
1st off... Hi Fellow NTX member!

Is it blowing any black smoke when its revving? And I know it sounds silly, but are you sure you just don't have the idle speed adjusted up too high? Also, sometimes if the throttle cable isn't routed correctly they can rev when the bars are turned.
 
TheYukbob said:
Any have ideas as to why the revving is happening? What I know is detailed in my last post.
Click to expand...
Make sure throttle cable has some slack.
Did you bench sync these carbs, so throttle plates are all about same ? They will appear almost fully closed across carb throats when sitting on idle stop screw.
 
tom203 said:
Make sure throttle cable has some slack.
Did you bench sync these carbs, so throttle plates are all about same ? They will appear almost fully closed across carb throats when sitting on idle stop screw.
Click to expand...

Ok, I checked the things you said, the throttle cable has slack and yes I did bench sync them. They are almost fully closed at idle so the idle screw is not set too high. What else can I look for?
 
TxGSrider said:
1st off... Hi Fellow NTX member!

Is it blowing any black smoke when its revving? And I know it sounds silly, but are you sure you just don't have the idle speed adjusted up too high? Also, sometimes if the throttle cable isn't routed correctly they can rev when the bars are turned.
Click to expand...

No, there's no black smoke but it is running very rich as I can smell gas from the exhaust, also the bars are completely straight. My mixture screws are at 3.5 turns out, is that what's causing this?
 
TheYukbob said:
No, there's no black smoke but it is running very rich as I can smell gas from the exhaust, also the bars are completely straight. My mixture screws are at 3.5 turns out, is that what's causing this?
Click to expand...

I don't have any experience with your model, but most carbs are between 1 and 3 turns out, and that could cause the "richness" however it wouldn't explain the high idle. Try turning the idle speed screw out some... maybe you just have it set too high.
 
TxGSrider said:
I don't have any experience with your model, but most carbs are between 1 and 3 turns out, and that could cause the "richness" however it wouldn't explain the high idle. Try turning the idle speed screw out some... maybe you just have it set too high.
Click to expand...

Alright I tried between 2.5 and 3.5 turns out and now it won't even start. Though that may be because it's 45?F outside where I am?
 
You must log in or register to reply here.
Back
Top