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General Category => General Discussion => Topic started by: duncan on September 08, 2015, 10:35:40 AM

Title: California 3 airbox / breather hoses
Post by: duncan on September 08, 2015, 10:35:40 AM

Excuse me, but I need to start yet another "breather hoses" topic. I know there are plenty already, but none of them apply to me.

I have two Cal3's at the moment. Both are stock, both run and neither leaks oil (not from the breather hoses and air box, anyway :laugh:). However, I found today that the oil breather hoses to and from the spine are routed different between both. Since I do not believe both ways can be correct at the same time, I hope someone can point out which version I need.

Both obviously have the large connection with ball valve on the engine connected to the top/front of the spine, anything else would be too crazy for words. The difference is in the smaller hoses.

Version 1:

• The small front/upper connection goes to the Y-piece under the airbox. The other side of the Y-piece vents under the gearbox.
• The two rear/lower connections on the spine are connected to the cylinder heads, one on each.

Version 2:

• The small front/upper connection splits into two hoses, one going to each cylinder head.
• The right of the rear/lower connections is blocked with a rubber cap.
• The left of the rear/lower connections goes to the Y-piece under the airbox. The other side of the Y-piece vents under the gearbox.

I'm inclined to believe version 1 is correct, except that the hose on the Y-piece I have here does not fit on the (slightly) larger front/upper connection of the spine. However I do have a LeMans4 around which is routed in this same way, so it should be possible somehow. Judging from the maintenance history of the LM4 however, I do not want to accept its routing as a reliable source of information.

Any help is greatly appreciated.

Title: Re: California 3 airbox / breather hoses
Post by: salsaman1964 on September 08, 2015, 10:53:00 AM

I have two Cali 3's and both are configured as version 1 except that I have K&N filters fitted and there is only a single hose from the top of the spine that vents behind the gearbox.
Hope this is of some help.
Regards Tony

Title: Re: California 3 airbox / breather hoses
Post by: duncan on September 09, 2015, 12:52:14 AM

Thanks, I suppose I'll go with that. One part that makes no sense it the breather hose from the airbox (but after the filter) to under the gearbox.... that would allow unfiltered air into the carbs?! Anyway, to paraphrase guzziology: just because it makes no sense, doesn't mean its wrong. Especially on guzzis :cool:

Title: Re: California 3 airbox / breather hoses
Post by: Sashadeboer on February 04, 2018, 02:09:06 AM

Hi, did you ever figure out why there's unfiltered air being let in?