• 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.

83 750 Katana heads on 82 1100 Katana

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

Anonymous

Guest
Is it at all possible to swap heads on these motors. Problem I'm having is the 1100 motor has no compression on any cylinders, and no vacuum at the carbs. when I do get it started it runs fine, but cannot set idle speed, once the bike is warmed up, it starts with no problem, and has vacuum at carbs.
could this possibly be that the valves are sticking open. I have 36 mikuni rs flatsides on motor. your help would be appreciated.
 
No compression at all? it would not be able to run.
Is the throttle wide open when you do the test? Could your gauge be faulty?
 
I guess if you're running RS carbs you know enough to run valve clearances. Did you do a wet check to see if compression got better? If compression is that bad and blowing past your rings you should be able to hear it through the oil filler hole while cranking. I'd hate to think you had enough bad valves to where compression was that low on all cylinders.
 
kat 1100 no compression

kat 1100 no compression

I hooked up compressed air to the motor and when under air pressure I did not get any blowby, when manually turning the engine over I did get resistance and back pressure, I also used two different compression gauges , cause I didnt believe the first one lol, If I feed enough gas into the engine it will eventually start, I then have to turn up the idle to keep it going, once the engine is hot it starts fine, runs great, lots of snot, but when cold same old problem, ready to use motor as boat anchor :twisted:
 
Rather strange! Are your valve clearence's OK.
No compression, wont idle but runs great!
I have to say again a motor will not run without compression, could your valve timeing be out?
 
Did you just put the flatsides on? The idle cicuit could be out of whak.
 
1100 kat anchor motor

1100 kat anchor motor

Yes I had a mechanic do the valve clearance, just to make sure I didnt f@#K
it up, He' a pretty good mechanic doing this for like 30 years, He is just as puzzled. He believes the valve are stuck open and when I finally get it started the heat probably helps them work , but when engine cools, same old problem, The other thing of note is when its warm u cannot set the idle correctly, it just wont work, but I put the same carbs on my 1150 and vroom
everything is perfect, go figure. thats why I believe I should pull the head off
 
It probably is time to pull the head. Could have burnt exhaust valves or seats.
 
BTW, TSCC heads are pretty much model specific because of the squish area in the combustion chambers. It's the very thing that made the TSCC heads so effecient.
 
The valves could be carboned up not allowing them to close BUT That would be apparent when adjusting the valves Recheck the compression hold the throtle wide open when checking the compression
 
You must log in or register to reply here.
Back
Top