Honda-SOHC

SOHC.co.uk Forums => CB350/400 => Topic started by: Eldrick on June 14, 2024, 02:31:37 PM

Title: Valves, can the stem be bent?
Post by: Eldrick on June 14, 2024, 02:31:37 PM
 Just cleaning the valves and seats on the bike, removing them one at a time. I noticed one of them needed tapped with a hammer to get it out. (#1 cylinder). After the springs were removed the valve is tight in the socket so I removed #2 valve and that runs free in #1. The #1 is tight in #2 so I am guessing I need at least one new valve.
Am I correct with my reasoning?
 When the bike was running last week there was nothing wrong with the firing on #1 however, I don’t want to ‘force’ the valve back in if it is a sign that the valve may not function when the bike is running. I did run some 400grit sandpaper over the stem to clean that up, it did not make any difference to the tightnes of the fit.
Title: Re: Valves, can the stem be bent?
Post by: Nurse Julie on June 14, 2024, 02:46:49 PM
Yes, the valve could be bent, or the valve guide may have a crack in it.
Title: Re: Valves, can the stem be bent?
Post by: McCabe-Thiele (Ted) on June 14, 2024, 02:57:01 PM
I think I have a good  used valve spare - yours foc for the cost of postage.
I need to double check first that it's not the inlet I have.
I'm out at the moment so will be a couple of hours.

Update  I have one ex: & one in: valve both serviceable - they look original factory cut angle. PM me which one you need plus your address. cheers Ted
Title: Re: Valves, can the stem be bent?
Post by: Bryanj on June 14, 2024, 03:29:57 PM
Yes it could be bent or the stem is mushroomed
Title: Re: Valves, can the stem be bent?
Post by: Eldrick on June 14, 2024, 03:52:33 PM
I think I have a good  used valve spare - yours foc for the cost of postage.
I need to double check first that it's not the inlet I have.
I'm out at the moment so will be a couple of hours.

It is the Inlet valve (larger of the two heads) that is sticking so if you have one I would be grateful, if not I will source one.
Title: Re: Valves, can the stem be bent?
Post by: McCabe-Thiele (Ted) on June 14, 2024, 03:55:19 PM
See my updated post & ,PM me.👍
Title: Re: Valves, can the stem be bent?
Post by: Eldrick on June 14, 2024, 05:47:48 PM
See my updated post & ,PM me.👍

Thank you
Title: Re: Valves, can the stem be bent?
Post by: McCabe-Thiele (Ted) on June 15, 2024, 12:43:09 PM
Item posted out today should arrive by Wednesday.