KZ750 freeze up while riding

Hey fellas,
I bought a 77 kz750b1 twin from a guy who claims that it froze while he was riding. My first thought was that he ran it out of oil but he said no. Its been sitting for a few months. I used the penetrating oil trick but no go. Im pretty sure that I have to take the engine apart. Any suggestions? I tried taking the top end off but it seems that the two sections adheized together. I tried prying, pulling, everything no go.Thanks, row107

I think the most likely culprit in a sieze would be either a main bearing cooked or a piston siezed in the cylinder. I think a starter clutch can do it if it fails just wrong.

I tried taking the top end off but it seems that the two sections adheized together

The head should come off the cylinder pretty easily, but getting the cylinder loose from the crankcase can be a royal pain even in a good engine. There are pry points but it is still hard to separate. They used a very strong sealer on mine and it was murder to pull free.

double and triple check that all the bolts are out before doing anything else

Do you know what year engine are the same build incase I need one. A friend found a '82 twin.

timebomb33 wrote:

double and triple check that all the bolts are out before doing anything else

a common thread answer is given above as to the head still being hard to lift off....

I got the head off but the section that covers the crank will not budge. Where can I find a service manual either on cd or hard copy.

Try at www.repairmanual.com it might be a few $ but has all the factory specs in it. Another place to look is www.onlinefreebooks.net .

sure does sound like a piston siezed in the cly, if you are looking down the bore is there any visable scratches or scoring?