Honda-SOHC

SOHC.co.uk Forums => CB500/550 => Topic started by: paulbaker1954 on April 26, 2018, 06:11:14 PM

Title: Compression test levels
Post by: paulbaker1954 on April 26, 2018, 06:11:14 PM

Just been doing some more investigating on my odd sounding no 1 cylinder and decided to check compression. I am getting 135 psi on all 4 pots so no drastic difference on no 1 cylinder

That said are these readings a bit on the low side as the maintenance manual mention 177 psi

I should add that engine had a full rebuild 2k miles ago with new pistons and rings and I also regrouped all valves in etc

I should add that this was a “dry” test ie no oil put down bores etc

Title: Re: Compression test levels
Post by: hairygit on April 26, 2018, 06:30:40 PM

Did you have the throttles wide open and a warm engine?

Title: Re: Compression test levels
Post by: paulbaker1954 on April 26, 2018, 07:28:57 PM

Quote from: hairygit on April 26, 2018, 06:30:40 PM

Did you have the throttles wide open and a warm engine?

Should have said
Throttles and choke open on cold engine, would a warm engine make that much difference