• 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.

Why are carbs 1&4 different from 2&3?

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

Anonymous

Guest
I'm curious about something -- not world-ending stuff, just stuff that made me go, "Hmm?" The bike is a 1982 GS1100GL.

The float bowls for the 1&4 carbs are different from the bowls on 2&3. The biggest difference is that the drain slots are 90 degrees rotated from each other. The outer carbs have drain slots that are fore and aft of the hole, and the inners have slots left and right of the hole. (I may have that backwards, but you get the idea.)

Also, the float bowls on the outer carbs are much shinier than the inners. This is confirmed by the photos on pp.132-134 of the Clymer's manual.

And there's one more, tiny, tiny difference. On the outer carbs, the drain slots go all the way through into the bowl. On the inners, the slots stop just short of the bowl, leaving a very thin little lip. I noticed the effect of this before I saw the cause. Ever notice that the inner carbs drain a *lot* more slowly than the outers?

So what gives? Suzuki wouldn't have made them different (therefore increasing inventory holding costs, the potential for misassembly, etc.) unless they had a reason. So what reason could there possibly be for rotating the drain slots by 90 degrees? For making them shinier? For making them drain more slowly?

I just don't get it. Any ideas?

D
 
different carbs

different carbs

Are the drain holes different so they can be reached with a screwdriver while in place?
The shininess is costcutting. Only polish what peopek can see. I have some sixties motorcycles that have the exhaust pipe polished shiny except where the heat shield covers the pipe. In that area its just a little better than brushed finish.
The 1150 carbs are jetted differently, inside carbs slightly larger than the outside ones , but thats to compensate for cooling etc.

Suzookeeper Ger
 
Re: different carbs

Re: different carbs

suzookeeper said:
Are the drain holes different so they can be reached with a screwdriver while in place?
Click to expand...

The holes are all in the same place. The only difference is that the slots attached to the holes are rotated by 90 degrees between the outer and inner carbs. I can't imagine why this would make a difference to getting the screws out, which is a PITA in any case. :)

suzookeeper said:
The shininess is costcutting. Only polish what peopek can see.
Click to expand...

I could see that. I guess they saved more money by not polishing them than it cost to maintain inventory on two different parts.

suzookeeper said:
The 1150 carbs are jetted differently, inside carbs slightly larger than the outside ones , but thats to compensate for cooling etc.
Click to expand...

Is this true on any other models? Are all the jets on my 1100 the same?

D
 
Re: different carbs

Re: different carbs

deafen said:
Is this true on any other models? Are all the jets on my 1100 the same?

D
Click to expand...

The GS1150 is jetted different only on some markets (General markets, meaning country code 1, South Africa, Australia and Canada.

In Sweden for example, the jets for all four carbs are the same.
 
You must log in or register to reply here.
Back
Top