• 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.

Eyeballing 78 550 cams

  • Thread starter Thread starter mlinder
  • Start date Start date
Nessism said:
Checking the cam specs shows the 550 uses a 104 cam centerline for both cams. The 650 uses 106 Intake and 103 exhaust. The lift is a positive thing so I'd use the 650 cams and then degree them both to 106, or higher even, if you want high rpm power. I think this will make a bigger difference than the small amount of extra overlap afforded by the 550 cams.
Click to expand...

When I got to working out the CL numbers it was a little confusing with the 650 Intakes at 106 and the Exhaust at 103. This is the reverse of normal Suzuki GS practice which in all other motors has the exhaust with a bigger CL than the Intake. So I was not sure why the Suzuki engineers had gone against current practice on the 650 motor. And I was not sure what characteristics the motor would display if I timed it following conventional practice. My settings were 105 Intake and 107 Exhaust. I think maybe Suzuki set the timing back to front on these 650 motors for some environmental or emmissions reason.

Having said that I have been extremely impressed with the power this motor makes and it feels more like a 750 to ride than a 650, in fact this motor feels much stronger than my CB750K2 I had in times gone.
 
Last edited:
You must log in or register to reply here.
Back
Top