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 Post subject: Oily H1.
PostPosted: Fri Oct 13, 2023 9:11 pm 
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Joined: Thu Jun 09, 2011 7:03 am
Posts: 4604
Location: Milang, South Australia
I have a friend over here (Australia) with a pristine, Concours winning H1, '69, points model. It has been assembled with the greatest of care and advice. The issue is - it over oils really badly, this is with the pump adj. cut back and running B8HS plugs. A 30 mile ride will see new plugs wet and black. The unusual thing is this happens on the Right and Centre cylinder only, the Left is fine! (I would have thought the Right only may be prone to over-oiling?! :think: ) The oil pump has had new seals and careful re-assembly. Does anyone have any experience or thoughts on this issue? If it was all 3 over-oiling, or just the Right, I'd have more to work with!

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 Post subject: Re: Oily H1.
PostPosted: Fri Oct 13, 2023 9:37 pm 
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Joined: Wed Jun 08, 2011 11:34 pm
Posts: 9840
Location: North Central NC
Is there any chance that it's running too rich, maybe worse on the C and R cylincers, and that's making it seem like the problem is too much oil? If the problem is floats sticking for example, the symptoms will be worst at idle, and really wet the plugs just before you shut it off to check them. That's happened to me.

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 Post subject: Re: Oily H1.
PostPosted: Sat Oct 14, 2023 6:26 pm 
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Joined: Thu Jun 09, 2011 7:03 am
Posts: 4604
Location: Milang, South Australia
Thanks Jim, I hadn't considered that, it gives us something to work with!

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 Post subject: Re: Oily H1.
PostPosted: Sun Oct 15, 2023 7:15 am 
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Joined: Wed Jun 08, 2011 11:34 pm
Posts: 9840
Location: North Central NC
Rod, every time I read the list of thread titles I see your pun. I just wanted to acknowledge your effort. :lol:

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 Post subject: Re: Oily H1.
PostPosted: Sun Oct 15, 2023 7:35 pm 
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Joined: Thu Jun 09, 2011 7:03 am
Posts: 4604
Location: Milang, South Australia
Jim wrote:
Rod, every time I read the list of thread titles I see your pun. I just wanted to acknowledge your effort. :lol:

Why, thank you ver' much, Jim, I hope retirement is fitting you well!

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 Post subject: Re: Oily H1.
PostPosted: Sun Oct 15, 2023 9:42 pm 
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Joined: Wed Jun 08, 2011 11:34 pm
Posts: 9840
Location: North Central NC
RODH2 wrote:
Why, thank you ver' much, Jim, I hope retirement is fitting you well!


Thanks Rod. I'm busier than ever, and happy to be. Today I retorqued the head bolts on the 289 Ford in my 1967 Correct Craft Mustang after some engine work. It should be in the water a time or two before the cold season. Or maybe during the cold season. :)

What's keeping you busy?

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 Post subject: Re: Oily H1.
PostPosted: Mon Oct 16, 2023 7:48 am 
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Joined: Thu Jun 09, 2011 7:03 am
Posts: 4604
Location: Milang, South Australia
Jim wrote:
RODH2 wrote:
Why, thank you ver' much, Jim, I hope retirement is fitting you well!


Thanks Rod. I'm busier than ever, and happy to be. Today I retorqued the head bolts on the 289 Ford in my 1967 Correct Craft Mustang after some engine work. It should be in the water a time or two before the cold season. Or maybe during the cold season. :)

What's keeping you busy?

Cheers Jim.. A move to the Country (done) and a bit of self-sustenance is the current project. Space and time! The Vintage Japanese Motorcycle Club is having its National Rally in Nuriootpa, South Australia, in the Famous Barossa Valley next March and my H2 will feature, to a greater or lesser extent! (You may quote me!) I can combine my Kawasaki experience with my great knowledge of wine, not at the same time, understand! I will try and post some pics on this blessed anti-deluvian site in the near future, meantime I am keeping up with the crazy European Triples guys on the site that shall not be mentioned! Oh BTW, We caught up with Barry Boulier and Liz in Adelaide for a very brief but cool visit, Triples will prevail!

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 Post subject: Re: Oily H1.
PostPosted: Mon Oct 16, 2023 5:59 pm 

Joined: Thu Jun 09, 2011 11:25 am
Posts: 3147
Oil pump set too high on wheel (we used to cut a groove in the line and back the cable to it, lessening the pump output.

Right and center, two possibilities, one is the O ring on the end cap, service bulletin in the resources pages.

The other, the release pressures in the oil pump lines, too low. A simple air pressure check (HAND PUMP ONLY, NOT AIR COMPRESSOR), and stretch the spring until the release pressure on the check valve is 4.6 PSI, NO LESS. Make a banjo bolt with nut, use two sealing washers, and with line DRY, no oil, gently hand pressure the line, listen for the valve release sound. To reset, unscrew the banjo off the oil line, stretch spring GENTLY, reassemble, recheck. 4.6 PSI.

Also, keep checking the transmission fluid level, right and center crankcases share case with transmission, case leak, trans oil will get sucked into the crankshaft area. We used to add an ounce of Castrol R to the trans, smelled like race day, cases leaking.


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 Post subject: Re: Oily H1.
PostPosted: Tue Oct 17, 2023 3:05 am 
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Joined: Thu Jun 09, 2011 7:03 am
Posts: 4604
Location: Milang, South Australia
Thanks for those tips Dave, we will add that to the list of possibilities! :thumbup:

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