Puzzled: camshaft flange bolts before/after 9/75

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StephenB
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Puzzled: camshaft flange bolts before/after 9/75

Post by StephenB »

If you recall I am building a 600cc /5 engine from parts/scratch. The camshaft was a 284 from a /5 I thought. Now I am not so sure if it isn't a R60/5 camshaft (not that that makes any difference). Here's the skinny:

I was pretty sure that the 2 bolts to mount the camshaft on a /5 were countersunk (90deg) socket cap bolts. I ordered them from Motobins and yes, countersunk head cap screws.

Image

Meet my R60/5 engine: the flange has absolutely NO provision for a countersunk screw but rather a flat machined surface. REALOEM states that in 9/1975 the countersunk bolt was changed to a hex bolt (BMW part # 11311263853) with a wave washer.

Does anybody have the exact dimensions? M8 x 20 hex head (material class 12.9) is what I found ... or is it something more exotic like a low head?

At Motobins they show a M8 x 20 with a slotted hex head (looks standard M8 to me):

Image

Can anybody shed some light and get me some dimensions, please?


Thanks, Stephen
Some of the above is fact, some is fiction, some is my personal imagination and some is just simple truth. [me]
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StephenB
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Re: Puzzled: camshaft flange bolts before/after 9/75

Post by StephenB »

Anybody?

What's happening to this site? We used to respond to these kind of request ... and if only to degrade the threat!

But not even that? That is outright criminal!

Unless nobody actually knows what I am talking about ... which would put me far ahead of the curve, wonit!
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Major Softie
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Re: Puzzled: camshaft flange bolts before/after 9/75

Post by Major Softie »

Since no one (including myself) has seemed to know anything that might help, I will try to fulfill your other request:

All this talk of "head" had led me to stop thinking about motorcycles for a bit....
MS - out
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StephenB
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Re: Puzzled: camshaft flange bolts before/after 9/75

Post by StephenB »

See, I knew you'd come around ... phew ... I thought this site with all its members was dead!
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Ken in Oklahoma
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Gone are the "good old" days?

Post by Ken in Oklahoma »

StephenB wrote:Anybody?

What's happening to this site? We used to respond to these kind of request ... and if only to degrade the threat!

But not even that? That is outright criminal!

Unless nobody actually knows what I am talking about ... which would put me far ahead of the curve, wonit!

Stephen, I was wondering myself why there is less activity. What I came up with is that there is less activity. By and large (my take anyhow) though we do get a few new members, what we have left is a core of Boxerworks fans. And the old time denizens of Boxerworks have been there and done that. For them not that many technical questions come up that they need help with. I'm speaking primarily of Post 1970 Airheads.

As for Speakeasy, it's a similar thing. There is a core of participants who are pretty much well behaved. In other words a pissing contest is rare. Remember all the posters we didn't like, or at least who irritated us? Well, they are gone now. Now we seem to have a lot of rational discourse and mutual respect.

Be careful what you ask for, eh?

The big question in my mind is whether the excitement regarding airheads has essentially moved to Adv Rider? I haven't been on it for quite a while, but what I seem to remember seeing is quite of bit of technical improvement discussions.

You're building a bike and you've posted. Would you have posted much if you weren't building a bike? This is not criticism on my part. I'm thinking that's simply how things are nowadays. Plus there's a lot more information in the internet regarding airheads, or so it seems to me.

Remember when Duane came to the forum? Wow! Here was a guy who knows airheads inside and out. He'd written a lot of information and put it on a website. And he was (and mostly still is) available to deal with airhead problems--or at least problems that don't have answers easily gotten from the internet.

Duane was here for the rally at my place this spring. I don't remember a single technical question being asked of him. Duane as much as said that he was available at the rally for airhead questions, but the people here at the rally had already talked about syncing carbs by ear, or how to align front forks, or how to bench test a transmission. So the rally was about friendship and fellowship mainly--which is delicious. But not much technical ground gets plowed.

Look at me. When I came on to Boxerworks Nathan was still posting. I greedily soaked up information like a sponge. But I've changed too. I no longer seem to be hungry for the most minute airhead ephemera. Now it's unlikely that I will ever change out a crankshaft or camshaft or build a bike to satisfy a particular "need/passion" (like you were with your GS).

I sometimes wonder if pissing contests betray passions, which can polarize as well as educate. But wonder as I might, I'm not going to be in favor of the "bad old days" at Boxerworks.

I wonder what it's like on the Model A forums nowadays. Or for that matter, the Harley biker forums.

Disclaimer: On the other hand I might be full of shit too. Anybody else want to address Stephen's concderns?


Ken
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StephenB
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Re: Puzzled: camshaft flange bolts before/after 9/75

Post by StephenB »

Ken, I do agree with one thing you mentioned: we have been all over every technical issue there was, some of us for the last 20yrs. So by now, everybody knows what only the geeks knew, way back then. Duane certainly is one of them. Or, one is acquainted (use the term loosely) with such geek and contacts them directly.
Yes, ADVrider has become a fantastic source of technical info too over the years: their site is highly and tightly moderated, but topics are discussed just as controversial. Did I mention "Supershaft" aka "Funholiday", he is still his own self.

I do frequent the Speakeasy but am not really participating ... typing on a keyboard just simply annoys me. I'll wait until all forums have audio and video to choose from.

Stephen
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blitz
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Re: Puzzled: camshaft flange bolts before/after 9/75

Post by blitz »

I think things just change. (Who said entropy?)

For about 10 years, my daughters and I would ride our dirtbikes almost every weekend in the summer. They started on little honda 50 and 70, respectively, and developed until they rode (much faster them me) KTM 200's. Well, my elder daughter started racing sailboats (and winning), so she lost interest in the dirt bikes. My younger daughter started playing tennis (winning sometimes), and sort of gave up on dirt bikes, too. Now that they do other stuff, my interest has waned, too.

The good news is that they now both have their motorcycle endorsements. My elder daughter might streetbike ride with us over the weekend of the 28'th, and my younger daughter is for sure going on the Divided Methodists (our "club") ride from Minneapolis to Arkansas in August.

Things change.

I do work with GPS, and in discussing satellite signals, where time is more important than power, i realized it's the same with life. As I grow older, my time is diminishing. Maybe those on here realize that same thing, and spend their time "doing" instead of "writing."

Hard to say.

Time to go work on the $200 Sucati which my daughter is going to ride to Arkansas with us.

Anyway, anyone who wants to ride with us, we're meeting at the Peoria TT on August 11, then heading south to Arkansas. Back in MPLS august 18.
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dougie
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Re: Puzzled: camshaft flange bolts before/after 9/75

Post by dougie »

HEY!
I'm still here, and I don't even have a Beemer anymore. :o
I've spent most of my money on women, motorcycles, and beer.
The rest of it I just wasted.
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Steve in Golden
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Re: Puzzled: camshaft flange bolts before/after 9/75

Post by Steve in Golden »

StephenB wrote:I do frequent the Speakeasy but am not really participating ... typing on a keyboard just simply annoys me. I'll wait until all forums have audio and video to choose from.
Not sure what you mean, I am a little slow today apparently. Are you saying other forums "have audio and video to choose from"? How did you post your message on this forum if you didn't type it on the keyboard?
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Steve in Golden
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Re: Puzzled: camshaft flange bolts before/after 9/75

Post by Steve in Golden »

dougie wrote:HEY!
I'm still here, and I don't even have a Beemer anymore. :o
Still lookin' good too Dougie!
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