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Strap across the primary cover?

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Chris Haynes

Posts: 2602

Joined: Wed Jul 05, 2000 12:01 am

Location: Los Angeles, CA

Post Thu Apr 22, 2010 7:02 pm

Strap across the primary cover?

I was looking through some of my photos and found several photos of early K models with a chrome or stainless strap across the primary cover. Having never seen one of these in real life I wonder how long it was in use?
Image
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wilko

Posts: 159

Joined: Fri Jan 15, 2010 7:36 pm

Post Thu Apr 22, 2010 7:33 pm

Re: Strap across the primary cover?

Looks homemade to me!
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Chris Haynes

Posts: 2602

Joined: Wed Jul 05, 2000 12:01 am

Location: Los Angeles, CA

Post Thu Apr 22, 2010 8:02 pm

Re: Strap across the primary cover?

You don't mind if this photo disagrees with you do ya?
Image
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RUBONE

Posts: 379

Joined: Fri Nov 30, 2007 7:24 pm

Post Thu Apr 22, 2010 9:57 pm

Re: Strap across the primary cover?

Don't you know what that strap is? It matches the one across the cam and kicker covers!
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Robbie :lol:
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45Brit

Posts: 1360

Joined: Tue Nov 27, 2007 2:29 am

Post Thu Apr 22, 2010 11:57 pm

Re: Strap across the primary cover?

judging by the small size of the screws and the obvious fastenings elsewhere, it must be a cosmetic trim.
Shoot, a man could have a good weekend in Dallas with all that stuff...
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37ULH

Posts: 681

Joined: Mon Nov 25, 2002 1:01 am

Location: somerset, oh usa

Post Fri Apr 23, 2010 12:21 am

Re: Strap across the primary cover?

Those little screws don't have to hold the strip on as there is none. What they do secure is the outer primary, a little bigger task!
The strip is, as stated, just like all the others used, though on the other side of the bike, for quite a few years longer as alluded to by Robbie.
Although, especially your first picture Chris, appears that there is a strap overlaying the primary, it's in fact just the aluminum cover with a combination matte and, I believe, a polished / brushed finish on the reinforcing rib.
Also uncertain how many years this cover was used but I have one here.
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Chris Haynes

Posts: 2602

Joined: Wed Jul 05, 2000 12:01 am

Location: Los Angeles, CA

Post Sat Apr 24, 2010 3:24 am

Re: Strap across the primary cover?

Robbie,
You are correct about it being a polished strip. The confusing thing to me were the screws in the middle and at both ends making it appear to be screwed on.
There is no airbrushing on either of those photos. Photos that had been airbrushed are clearly marked on the Pholman log as COPY. Here you can see what the whole picture looked like. Those guys are mechanics in the factory Service School and that is their class photo. The date on that photo is 1/22/54.
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jib

Posts: 570

Joined: Sat Dec 10, 2005 3:36 pm

Location: devon,england

Post Sat Apr 24, 2010 6:02 am

Re: Strap across the primary cover?

hi, not ever had or seen a k in the flesh, have they got a dry clutch and drip lube on the primary, as three screws doesnt seem enougth to make a dry gasket seal if the primary was an oil bath type.
regards jib
Dude, check out that jibhead, he's crazy. Hasn't been sober for 40 years
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RUBONE

Posts: 379

Joined: Fri Nov 30, 2007 7:24 pm

Post Sat Apr 24, 2010 10:08 am

Re: Strap across the primary cover?

Jib,
The clutch was dry by nature of being encapsulated within the primary, however the chain ran in an oil bath. And the three screws were all there were until the stamped tin cover of the XLCH series. (The KR used a tin cover from the beginning!). The casting was rigid enough that the primary sealed fairly well.
Robbie
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ramjet

Posts: 55

Joined: Mon Apr 03, 2006 9:07 am

Location: west coast

Post Sat Apr 24, 2010 10:11 am

Re: Strap across the primary cover?

There are a couple of locating pins, as well as the three screws. The cast aluminum cover is stout enough to seal all the way around with just the three screws. You could run a dry clutch, with a derby cover over the clutch basket, or leave the cover off, and run a wet clutch. There is a thru hole, between the tranny and the primary, to let the chain run in oil.
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45Brit

Posts: 1360

Joined: Tue Nov 27, 2007 2:29 am

Post Sat Apr 24, 2010 11:38 am

Re: Strap across the primary cover?

IIRC, Royal Enfields have a single central bolt holding the chain case together... mind you, they WERE known as 'Royal Oilfields' back in the day. :D
Shoot, a man could have a good weekend in Dallas with all that stuff...
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jib

Posts: 570

Joined: Sat Dec 10, 2005 3:36 pm

Location: devon,england

Post Sat Apr 24, 2010 12:08 pm

Re: Strap across the primary cover?

cheers guys ,surprises me [but hell, life is full of them] it sealed .
regards jib
Dude, check out that jibhead, he's crazy. Hasn't been sober for 40 years

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