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Excelsior-Henderson Motorcycles Resource Forums => Technical Resource Discussion => Topic started by: Bobbybhb on September 05, 2020, 05:40:25 pm

Title: Rear cylinder oil port
Post by: Bobbybhb on September 05, 2020, 05:40:25 pm
Is there a descriptive file on the rear cylinder oil port upgrade?
Title: Re: Rear cylinder oil port
Post by: Donkey Hotey on September 06, 2020, 01:15:24 am
I'm afraid I'm not at all familiar with this upgrade you're mentioning. What was it supposed to accomplish? Do you remember where you read about it?
Title: Re: Rear cylinder oil port
Post by: Bobbybhb on September 06, 2020, 07:52:59 pm
I believe it is a later factory mod to motors after 1700
Title: Re: Rear cylinder oil port
Post by: Donkey Hotey on September 07, 2020, 02:48:10 am
I got your message in my email but, don't see it here. The board is doing very odd things these days.

I'm not aware of any changes that were done on the 1700 and subsequent bikes. I'd sure like to know what this is if true. I own 1940 and 1989 and I don't know exactly what has been done to them.
Title: Re: Rear cylinder oil port
Post by: wytfut on September 07, 2020, 10:36:36 am
Isnt this the port that was early in the game enlarged to give the tranny more lube?
Title: Re: Rear cylinder oil port
Post by: Donkey Hotey on September 07, 2020, 03:58:41 pm
You've got me there. Is this one of those theories someone came up with or did it become E-H canon and now I must atone for the missed updates?
Title: Re: Rear cylinder oil port
Post by: Bobbybhb on September 07, 2020, 07:50:18 pm
Sorry. I should have kept track of where I read it.
Title: Re: Rear cylinder oil port
Post by: Donkey Hotey on September 08, 2020, 04:57:41 pm
This was supposedly to divert extra oil to the transmission? I'm still curious. I do have to say that a moderately ridden bike would probably never have an issue or we'd have heard more about it.
Title: Re: Rear cylinder oil port
Post by: blackheart on September 09, 2020, 09:32:11 pm
So it's my understanding that the orificing for flow is done at the ends of the circuits which accomplishes several things, primarily limiting the number of passages and providing for more equal head at each orifice.   So any point of use modification would be the orifice itself, not the passage correct?  Unless of course the passage only fed one point.
Title: Re: Rear cylinder oil port
Post by: Bobbybhb on October 09, 2020, 05:38:50 pm
I found it on the Super X build sheet.