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Low compression on K75 Sat Mar 12, 2022 12:32 pm
Nom721
active member
I’m getting towards the end of a major restoration of my K75 and was starting up for the frist time in a very long time. I was a bit ancious to push the starter button but after a couple of revs it started to fire, erratic but it ran 
I turned it off and decided to do a compression test. Cyl 1 and 3 both did about 10 bars but no 2 only did 4-5 bars. I guess that’s the reason for the bad running. The question is now what is the most likely reason for the lack of compression? Where would I look first?
I turned it off and decided to do a compression test. Cyl 1 and 3 both did about 10 bars but no 2 only did 4-5 bars. I guess that’s the reason for the bad running. The question is now what is the most likely reason for the lack of compression? Where would I look first?
