Honda-SOHC

SOHC.co.uk Forums => CB500/550 => Topic started by: bigmockuk on December 18, 2014, 09:15:40 PM

Title: camshaft valve timing
Post by: bigmockuk on December 18, 2014, 09:15:40 PM

Hi all, just how easy is it to mis-align the cam sprocket by one tooth when doing a rebuild? considering the sprocket has no marks or would this matter? Im used to singles/twins but first time on a four.I had no 3 spitting back thru the carb before dismantle,lapped in all valves which were`nt that bad! so working backwards to find if a P.O made a mistake?

Title: Re: camshaft valve timing
Post by: Bryanj on December 19, 2014, 08:35:50 AM

The Marks are on the cam and crank and yes its easy to get one toth out and yes it matters a lot

Title: Re: camshaft valve timing
Post by: Trigger on December 19, 2014, 11:41:12 AM

Spitting back thru the carbs can be a problem with the carbs sucking air. Check the carb rubbers first. If they are OK then you will have to strip the carbs. Know of a CB550K3 doing this and it was a split in the brass tube in the float bowl.

Title: Re: camshaft valve timing
Post by: bigmockuk on December 19, 2014, 02:34:09 PM

Thanks guys,when i say no3 carb was spitting back i actually had the air filter box off at the time,had just set float heights and was checking for leaks when i noticed my palm getting wet when turning engine over or would be normal with the air box off? half expected no3 inlet valve had a bad seat but all was well