R80/7 Valve clearance a bit tight.

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CaptAirhead
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R80/7 Valve clearance a bit tight.

Postby CaptAirhead » Wed Sep 12, 2018 1:05 pm

Having sorted the oil feed problem, next job is to check and adjust the valve clearance.

Image1979 BMW R80/7 valve clearance. Adjustment. by Ian Beat, on Flickr

The clearance was negligible which was a bit worrying so I've set them properly and made a note to check them again once I've put a few miles on. I know for a fact the PO never used lead replacement but fortunately, this was one of 5 bikes he owned and he didn't put many miles on it.
This is the stuff I use:-

ImageLead Replacement additive. by Ian Beat, on Flickr

I guess time will tell if any damage has been done.
Ian.
If you don't make mistakes, then you aren't trying hard enough!

1979 BMW R80/7 (ex-Police)
2002 Yamaha Fazer 600

ws76133
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Re: R80/7 Valve clearance a bit tight.

Postby ws76133 » Wed Sep 12, 2018 1:35 pm

I check mine at every oil change. Since fitting lead free seats, they rarely need adjustment. If they close up, I'd suspect valve seat recession.

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Rob Frankhamr
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Re: R80/7 Valve clearance a bit tight.

Postby Rob Frankhamr » Wed Sep 12, 2018 6:08 pm

With the fact that you've had the heads and barrels off, I wouldn't be too concerned at all. It's very rare for valve clearances to be exactly right after they've been off, a very slight difference in the thickness of the replacement gasket and the clearance is way out. On the other hand, you're very wise to keep an eye on it. VSR, when it occurs, can happen quite quickly and cause untold damage.

Rob
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CharlieVictor
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Re: R80/7 Valve clearance a bit tight.

Postby CharlieVictor » Wed Sep 12, 2018 8:24 pm

So far I have checked them every 10000 kms, actually waiting for signs of slightly more difficult cold start. And they were never off by much, and in pretty good shape as the latest inspection revealed.

No unleaded seats, no additive, 140000 kms give or take...
1978 BMW R100S "Naked"
1999 W65L "Twin with a kick"

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CaptAirhead
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Re: R80/7 Valve clearance a bit tight.

Postby CaptAirhead » Thu Sep 13, 2018 12:20 am

Did anyone notice that, after I loosened off the adjusters, I posed the feeler gauges the wrong way round to take the picture.

Happily I got them the correct way round when I adjusted them.

Ian.
If you don't make mistakes, then you aren't trying hard enough!

1979 BMW R80/7 (ex-Police)
2002 Yamaha Fazer 600

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Jaythro
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Re: R80/7 Valve clearance a bit tight.

Postby Jaythro » Thu Sep 13, 2018 8:15 am

Did anyone notice that, after I loosened off the adjusters, I posed the feeler gauges the wrong way round to take the picture.

Happily I got them the correct way round when I adjusted them.

Ian.
Nope, "But" I hope you stuck that big pipe where its should be and tightened the big nut!!
"Put your Ass on a motorcycle and ride with an attitude and the "Grim Reaper" will ride in your shadow!"

Islandmagee in case you're interested?

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CaptAirhead
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Re: R80/7 Valve clearance a bit tight.

Postby CaptAirhead » Thu Sep 13, 2018 10:37 am

Did anyone notice that, after I loosened off the adjusters, I posed the feeler gauges the wrong way round to take the picture.

Happily I got them the correct way round when I adjusted them.

Ian.
Nope, "But" I hope you stuck that big pipe where its should be and tightened the big nut!!
Haha.
The reason it is sticking out is that I had a set of these fitted:-

ImageBMW Airhead exhaust Nut Repair Clamps by Ian Beat, on Flickr

and discovered that I couldn't get at the nut at the back of the rocker cover with them in place. When I refit them I will have to remember to orient them so I can get at the nut other wise I will have to remove them every time I want to check the valve clearance.
Ian.
If you don't make mistakes, then you aren't trying hard enough!

1979 BMW R80/7 (ex-Police)
2002 Yamaha Fazer 600

Roy Gavin
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Re: R80/7 Valve clearance a bit tight.

Postby Roy Gavin » Fri Sep 14, 2018 12:07 am

My 1977 R75/7 is the same as Charlie Victors, 150,000 km and seats never been touched, almost twenty years on unleaded.
I check mine with big Stanley, one end on the head, the other end on the skull - as long as they tick on a hot motor I am OK.
Cant remember the last time I had to adjust the valves on any of my bikes, but I do have MA Synth in everything.

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andyb
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Re: R80/7 Valve clearance a bit tight.

Postby andyb » Fri Sep 14, 2018 9:01 am

The engine oil used will not effect valve recession
Andyb
R100R work-day-bike
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CaptAirhead
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Re: R80/7 Valve clearance a bit tight.

Postby CaptAirhead » Fri Sep 14, 2018 11:11 am

Thanks for the replies chaps. When I looked down the barrel when I had it off, there was no sign of VSR that I could see and there was plenty of adjustment left so I guess I was worried about nothing. After a wee chat with the PO (my brother in law) he told me that he never put much mileage on the R80 as he only went for a wee Sunday bimble once a month on it as he had four other bikes and preferred his Honda Goldwing at the time. He also told me that apart from oil change and carb tweak he never did any maintenance or made any other adjustment so I reckon that the valve clearance just closed up over time due to lack of maintenance. Anyhoo, looks like I caught it in time and everything is now sorted.
As a twist of irony, he has just bought an '81 R100RT and after a wee lecture from me has started to take better care of it. He still has a couple of Goldwings and a Triumph Speedmaster but the R100 seems to be his favourite ride at the moment. The downside is that he keeps wanting to dip into my spares box.
Ian.
If you don't make mistakes, then you aren't trying hard enough!

1979 BMW R80/7 (ex-Police)
2002 Yamaha Fazer 600


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