914

[rhtrudder]

Ended up removing the head, the seat had a small scourered section in line with the exhaust valve, mate ownes the local Honda dealership and one of his old school mechanics soon tidied it up , valve was okay, changed all the radiator hoses at he same time while I could get to the water pump, compressions now good , back flying , engine seems a bit smoother .

 

 

[planesmaker]

Good result

 

 

[rhtrudder]

Thanks, in the end it was an easy fix, unsure what caused it in the first place with hydraulic lifters these engines shouldn't have many valve related problems.