SOHC.co.uk Forums > CB350/400
compressions
rosco:
Having had rebore with new pistons and the head refurbed Engine rebuilt using all new internals Carbs rebuilt It now starts on the button runs and revs freely
Just done a compression test as a check and all 4 cylinders show 122-124 I was expecting 150 plus
Had a leak down test done and all is ok with the head ( no leaks passed valves) and all cylinders show under 4% The only leak noise is heard in crankcase through oil filler
Do you think ive missed something doing the rebuild Or will it get better when i can get some road miles on it Cheers Ross
Nurse Julie:
How many miles ha e you done now Ross?. It may be worth you trying a different set of gauges as well. The fact that all 4 cinders compression is so close would suggest all is OK.
rosco:
Its Not on the road yet Was hoping to very soon
Took a year out to move house
Nurse Julie:
--- Quote from: rosco on July 25, 2021, 05:28:47 PM ---Its Not on the road yet Was hoping to very soon
Took a year out to move house
--- End quote ---
Don't worry about it at this stage then Ross. The engine needs to be run in and the rings well bedded in before you get an accurate reading.
rosco:
Cheers Julie, Reassuring. Didn't think id missed anything with the rebuild but you begin doubting yourself Its good to get feedback before you start pulling it apart unnecessarily.
Will get it de -sorned and get some miles in and check again after 500 or so miles Cheers Ross
Navigation
[0] Message Index
[#] Next page
Go to full version