Triggerton III
XS650 Enthusiast
Hi all
I am looking fir a few pointers please. I have just rebuilt the top end of an 82ish engine. (First engine rebuild of any kind). I did have good compression. fired up with a little fettling. I checked the compression as it would no longer fire up
These are the results I am getting. left and right as though sat on the bike.
Left. Right
CT 65 65
OT 65 65
OIC 90 90
CT = Closed Throttle
OT = Open Throttle
OIC = Oil in Cylinder
The bike has done less than 4 miles and when it ran it was rough at low RPM.
Please sanity check my theory. The readings tell me that the valves are good. ( I did lap them)
The Rings wont be bedded in yet and I need to get that done to see if the compression comes up. I should be able to start it with the little oil in the cylinders.
I have checked the timing and it does look retarded, the marker on the rotor is well to the left of TDC marker when revving the engine.
Before I do this I will check the cam chain tension and adjust.
Any pointers or advice would be appreciated. I do get the feeling I will be taking the engine back out of the frame.
I am looking fir a few pointers please. I have just rebuilt the top end of an 82ish engine. (First engine rebuild of any kind). I did have good compression. fired up with a little fettling. I checked the compression as it would no longer fire up
These are the results I am getting. left and right as though sat on the bike.
Left. Right
CT 65 65
OT 65 65
OIC 90 90
CT = Closed Throttle
OT = Open Throttle
OIC = Oil in Cylinder
The bike has done less than 4 miles and when it ran it was rough at low RPM.
Please sanity check my theory. The readings tell me that the valves are good. ( I did lap them)
The Rings wont be bedded in yet and I need to get that done to see if the compression comes up. I should be able to start it with the little oil in the cylinders.
I have checked the timing and it does look retarded, the marker on the rotor is well to the left of TDC marker when revving the engine.
Before I do this I will check the cam chain tension and adjust.
Any pointers or advice would be appreciated. I do get the feeling I will be taking the engine back out of the frame.