#110

Post by SlyDogJeff77 » Mon May 26, 2014 9:58 pm

First off, I want to say thanks to my friend Billy who came over today and helped me out. Besides some serious expertise in classic metric motorcycles he had the adapter I needed and we did a compression test. SURE ENOUGH!!!! cylinder 1, 2 & 3 were @ 120-125 pounds.. cylinder 4 was about 60-70 pounds.....

AND WITH THAT.. OUT CAME THE ENGINE AGAIN!!!

only this time I was sure to HALF THE ENGINE BLOCK!!!

So it took about 2 hours to get the engine out, another 2 hours to get everything off and get the block in half to find the problem and decide what I need.



Cylinder 4's rings are completely packed and locked in solid on the piston and they are not expanding at all.

they are not moving. I'm going to try and break they off but if I can't I'll use one of the piston's from the '82.

I'm going to order 4 new piston ring sets and re-do all 4 pistons while I have the engine open.

The bearings are good.

the rest of the block looks good, I just have to clean the inside of the rest of the rotten oil from 1987.



As for the backfire, we found the that spark advancer unit had some left over crud and oil on it. That's probably the whole reason for the back firing!!

I have to procure some electrical cleaner spray and go at that too.

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