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« on: May 01, 2015, 09:11:45 pm »
Gentlemen, assistance please. Bike is a ’74 250 mag engine.
When I bought the bike, it was low on compression when kick starting. It still started and ran fine, just not very fast. Took the head off and found a thin gasket between cylinder and head. I know that huskys do not have a gasket here. Positioned piston ring just below exhaust port and measure end gap and I believe that the ring is still ok by the owner's manual. Please bear in mind that we are talking about an electrician using feeler gauges. Considering that a gasket was used, I am guessing that there is a problem with the mating surfaces of the cylinder to head.
Question 1
If I put some fine wet and dry emery paper on a flat surface and move the cylinder around in a figure “8” pattern will this fix that surface?
Question 2
How can I prove the head mating surface is true?
Question 3
Any other theories on the low compression?
Thanks in advance guys
Ed