So ..... it sounds like you have removed the cylinder
If so, then there should be no detectable up & down rod movement, and about 2mm or less side to side "rocking" movement on the small end of the rod itself.
The piston however can slide right and left quite a bit ... there's no spec for this particular free play.
If you're not hearing excessive piston noise while it's running, then everything sounds good to go, (based on your description).
If you are still concerned, you can post a clip of it running, so we can listen to it.
Thanks for recognizing that we are strictly a vintage Yamaha 2 stroke site.
However, I'll go ahead and comment
That is a highly collectable 1971 Kawasaki street bike you found, and was the absolute fastest production motorcycle down the quarter mile strip, back when they came out !
Although it needs a lot of work, . . . especially if someone plans to restore it correctly, it's certainly worth a $1000 in parts alone. A fully restored one recently sold for $26,000.
Personally, I wouldn't hesitate to buy that, and get it cleaned up, put back together and perhaps running.
You need to find a vintage Kawasaki web site that specializes in the "H1 Mach III" models. One of those guys would probably give you several thousand for it ... just the way it sits.
If you do purchase it, we won't be helping you get it running here . . . You will have to find the appropriate Kawasaki web site.
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Hi mguillory ,
So ..... it sounds like you have removed the cylinder
If so, then there should be no detectable up & down rod movement, and about 2mm or less side to side "rocking" movement on the small end of the rod itself.
The piston however can slide right and left quite a bit ... there's no spec for this particular free play.
If you're not hearing excessive piston noise while it's running, then everything sounds good to go, (based on your description).
If you are still concerned, you can post a clip of it running, so we can listen to it.
.