• 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.

Crankcase vent hose- airbox...

  • Thread starter Thread starter ResidentWarui
  • Start date Start date
R

ResidentWarui

Guest
Umm 2 questions.

1. So when I was taking my carbs out tonight I noticed that the crankcase vent hose to the airbox was disconnected... Could this have been a reason I was having so much trouble running my bike?

2. How can the airbox be removed with the carbs still in? I tried doing this as per the VM carb guide just released and there was no way it was gonna happen... Is it because the guide maker has a bigger bike? Mine being a 550 and his being a... 750 or 850 or something.. I ended up loosening the clamps on the engine side and the airbox stuff and wiggling back and forth until it was finally free.

Keep me updated. Rebuild happens this weekend :D
 
The vent hose being disconnected won't hurt anything although it should at least have its own filter. Previous owner was probably just trying to keep blowby from going into the fuel mixture. Can't answer you other question.
 
Yea that's what I thought.... Thanks for the reply...

Another thing is my oil level seems to have risen again...

Will that happen if it sits for a while or what? ...it doesn't smell like gas.
 
It might rise a bit as oil clears itself off all the internals. Make absolutely sure you don't have a leaky petcock and/or a stuck float.
 
Petcock was leaking somewhat. Another strange thing it did was it wouldn't put out any gas while on prime. Except in short spurts... Very strange.
 
Getting the airbox out is a little different on every model. You've just got to keep wiggleing and making sure it hasn't snagged any wires, and keep removing things until it comes out. On my 750 it's tight, but it does come out. THe 4th or 5th time you do it, it will be easier...

As for the crankcase breather - the crankcase side doesn't care - it just wants to vent, although it may get a little oil on things. On the airbox side, however, it may cause running problems since it is letting additional air into the box. These bike are very sensitive to the airflow through the box. Other more experienced people should be able to verify that or give more specifics about what kind of behavior that would cause. You might also try a forum search. That's probably been discussed before.
 
I see... Hopefully with my carbs rebuilt the bike will run well... who knows. The petcock thing is bogus as well.
 
Nope, carbs gotta come off first to get the airbox out. At least on my '80 550L.

Crazy isn't it. Get to the cam chain tensioner, pull the carbs. Get to the starter motor, pull the carbs. Break a throttle cable, pull the carbs.

Boring weekend? Pull... 8O 8O 8O NOoooo!
 
Petcock was leaking somewhat. Another strange thing it did was it wouldn't put out any gas while on prime. Except in short spurts... Very strange.
Click to expand...

Make sure your gas cap vent is clear...
 
jimcor said:
Nope, carbs gotta come off first to get the airbox out. At least on my '80 550L.

Crazy isn't it. Get to the cam chain tensioner, pull the carbs. Get to the starter motor, pull the carbs. Break a throttle cable, pull the carbs.

Boring weekend? Pull... 8O 8O 8O NOoooo!
Click to expand...

Hahaha...I thought so..

Gas cap vent eh? Could that also make it leak sometimes when it's in the on position or is that just the sign of a bad petcock?
 
To remove the carbs slightly!! more easily. remove the air filter housing from the rear of the plenum chamber,loosen ALL clamps,pull the carb rack rearwards, and remove the boots btween the carbs and the cylinder head. then tilt the carbs forward a little and remove out the left hand side.
I would recommend replacing the vent hose to the plenum chamber, as the spigot on the plenum being disconnected will laow the bike to draw unfiltered air, this may be adding to your rough running.
Dink
 
Forgive me for not knowing what the word plenum means... Please explain :)

Going to work on rebuilding the carbs now.... :D
 
You must log in or register to reply here.
Back
Top