ceisen
New Member
1979 CB750K
I'm at my wit's end. I've problem solved as much as possible, checked clearances, replaced gaskets, ensured timing marks are bang on (followed this for cam/timing installation as I found it much clearer than the Clymer manual... https://www.tapatalk.com/groups/deuceswild/installing-cams-t1144.html) but when I run a compression test I get zero across all cylinders.
With the same compression meter a cb450 nighthawk a friend just gave me that's been sitting for years will push 110 psi.
Not sure what I'm doing wrong or what is wrong with the engine.
If I put my hand over the intake there's plenty of air being sucked into the engine, great vacuum, and seemingly plenty of air being pushed out but again zero register of pressure in any cylinder.
Carbs are off, exhaust is off, I'm pulling one spark plug at a time.
What could be the cause of this? How can it be absolutely zero? Bent exhaust valves?
Any/all suggestions would be appreciated
I'm at my wit's end. I've problem solved as much as possible, checked clearances, replaced gaskets, ensured timing marks are bang on (followed this for cam/timing installation as I found it much clearer than the Clymer manual... https://www.tapatalk.com/groups/deuceswild/installing-cams-t1144.html) but when I run a compression test I get zero across all cylinders.
With the same compression meter a cb450 nighthawk a friend just gave me that's been sitting for years will push 110 psi.
Not sure what I'm doing wrong or what is wrong with the engine.
If I put my hand over the intake there's plenty of air being sucked into the engine, great vacuum, and seemingly plenty of air being pushed out but again zero register of pressure in any cylinder.
Carbs are off, exhaust is off, I'm pulling one spark plug at a time.
What could be the cause of this? How can it be absolutely zero? Bent exhaust valves?
Any/all suggestions would be appreciated