• 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.

No Mo Muffs and now No Mo Crossover

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

Anonymous

Guest
All I have now is the header pipes. While I have them off the bike I am going to paint them with high heat resistant flat black.

It looks like the OD is 1 1/2 inches.

I rad somewhere that the Yama XS650's prefer someking of muffs but another guy said long sytraight pipes work well too.

Any opinions on what I should try first with my gs450?
 
at least a good crossover pipe at the torque burns in your paint will let your engine maintain max torque efficiency, you should be fine with the straight pipes but watch your plugs for a lean burn. then jet accordingly. (don't forget to resync the carbs after a rejet.)
 
Don Watson said:
at least a good crossover pipe at the torque burns in your paint will let your engine maintain max torque efficiency,

What??????
Click to expand...
 
So, straight pipes don't require jetting changes, right? Actually, they usually do. See it's a trick
question. By not providing good cylinder scavenging, at least as good as the stock system, a
couple of things happen. First, more exhaust mixture may remain in the cylinder, diluting the
fresh charge for the next intake cycle. This may also mean that less fresh charge will enter the
engine because we've effectively cut down on its ability to flow air. So now we open the throttle
further in an effort to get some of our power back. But we're not providing as much signal to the
main jet. What this all means is we often end up having to rejet the carburetor(s), usually richer,
to get some of our power and driveability back. Gas mileage usually suffers as well. The
motorcycle may sound like it's fast, but put it on a dynamometer and there may be little to no
gain in power over a good stock system. This is in spite of the stock system's more restrictive
mufflers.
 
by having a crossover in your exhaust system it helps tremendously in the exhaust scavenging process. if you spray some paint on your exhaust pipes and run the engine around the block a couple of times the paint will have burned in several locations, these are called torque burns. also the discoloration of the cromed pipes are the same as the paint burns. so with no crossover then detman is correct in stating that you need to rejet. however with a properly placed crossover tube between the longer headpipes, there is a much less need for a rejet change.
 
You must log in or register to reply here.
Back
Top