Honda-SOHC

SOHC.co.uk Forums => CB500/550 => Topic started by: McCabe-Thiele (Ted) on February 18, 2024, 09:42:48 AM

Title: Crankcase breather on CB500 K1
Post by: McCabe-Thiele (Ted) on February 18, 2024, 09:42:48 AM
What is the correct route for the breather pipe from the cam top vent?
Anyone know what length of pipe I need shop manual does not say?
My outlet faces rearwards.
Title: Re: Crankcase breather on CB500 K1
Post by: Bryanj on February 18, 2024, 11:30:39 AM
From memory Ted over the carbs and down to back of engine between crankcase and swingarm
Title: Re: Crankcase breather on CB500 K1
Post by: deltarider on February 18, 2024, 12:58:05 PM
Some suggest it is supposed to end at the little guide bracket RH side near to where the battery breather tube ends,
Title: Re: Crankcase breather on CB500 K1
Post by: Johnwebley on February 18, 2024, 02:24:11 PM
Mine goes over the carbs, away from the throttle cables and linkage, above the airbox,and down between the battery box and  electric panel,

Length is personal preference,

About level with the centre stand pivot



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Title: Re: Crankcase breather on CB500 K1
Post by: McCabe-Thiele (Ted) on February 18, 2024, 03:09:25 PM
Thanks for the replies everyone. 👍👍👍
Title: Re: Crankcase breather on CB500 K1
Post by: Jan B on February 18, 2024, 03:27:13 PM
Same as John here. Never had issues with this setup.
Title: Re: Crankcase breather on CB500 K1
Post by: davidcumbria on February 18, 2024, 10:25:37 PM
Mine (. 550 k1) goes straight down between the carb inlets then across the engine top casing to the junction on the lower rhs of airbox, not over the carbs.
Title: Re: Crankcase breather on CB500 K1
Post by: deltarider on February 19, 2024, 08:24:23 AM
Mine (. 550 k1) goes straight down between the carb inlets then across the engine top casing to the junction on the lower rhs of airbox, not over the carbs.
Davis, if possible, I'd like to see some pics of it.
Title: Re: Crankcase breather on CB500 K1
Post by: mickwinf on February 19, 2024, 09:10:29 AM
550 is a different system than 500
Title: Re: Crankcase breather on CB500 K1
Post by: deltarider on February 19, 2024, 11:01:59 AM
550 is a different system than 500
I know, Mick. The question about connections and routing regarding that particular CB550K airbox keeps reemerging in various fora. That's why I asked David to post some pics.
Title: Re: Crankcase breather on CB500 K1
Post by: davidcumbria on February 21, 2024, 08:38:02 AM
Here are some pictures of my cb550 k1 crankcase  breather  hose. The attachment to the right angle connection on the airbox is a bit unclear - it’s behind the illuminated battery bracket. You can also see the ( modified ) air filter housing drain with a silver clip so don’t be confused into thinking that’s where the crankcase breather connects.
Title: Re: Crankcase breather on CB500 K1
Post by: McCabe-Thiele (Ted) on February 21, 2024, 08:11:41 PM
Thanks for the photos Dave that will help me when I fit mine - my hose is on its way.
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