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My R69S Conversion

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kirkpatrick3890
Posts: 71
Joined: Fri Oct 27, 2006 3:00 am
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My R69S Conversion

Post by kirkpatrick3890 »

My conversion is a 1969 R69S purchased about 5 years ago from Peter Gruner in VA and came with:

’75 R90/6 engine, ’74 trans, 32/10 ratio (3.20) then July 2020 37/11 (3.36, for sidecar) rear drive, custom driveshaft, /5 headlight bucket, Heinrich tank, Wixom fairing & bags.

I have added dual discs the same size as a GSXR 750/1000 fitted to /6 front hubs custom cut down to allow for fitment of wire wheels, aluminum wheels, R90S engine emblems (not pictured), R80G/S oil pan & bash plate (just for fun), brake m/c from ’88 RS/RT, air horn, sidecar springs and new dampers.

Once I figure out how to resize the pictures I have of my conversion I will post them :-)
This site says my pictures are too large.
Mac Kirkpatrick
President, VBMWO

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palica
Posts: 39
Joined: Sun Jun 28, 2020 10:22 am
Location: Montreal, Qc, Canada

Re: My R69S Conversion

Post by palica »

Can't wait to see the pics... :D

If you need to resize pictures, there are several free SW that will make it for you, but the simplest solution is to email you the pics: those will be automatically resized or the option to reduce the size will be given to you.
1967 R50/2 with Duna sidecar
1974 R90S

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cbclemmens
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Location: Apollo, PA
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Re: My R69S Conversion

Post by cbclemmens »

You should be able to rent an automotive engine hoist for a few bucks a day. At my age (73) I have learned to let equipment do the heavy lifting. It reduces the potential for damage to both the equipment and my body.

Craig

blacknight
Posts: 30
Joined: Thu Sep 10, 2020 6:22 pm

Re: My R69S Conversion

Post by blacknight »

a GSXR 750/1000 fitted to /6 front hubs custom cut down to allow for fitment of wire wheels,


why did you have to cut down the stock hub ? there IS plenty of room for a std. 4 rib hub off a /6-S model.
Gooday
Harry

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Fred Heiler
Posts: 12
Joined: Mon Aug 07, 2017 4:20 pm

Re: My R69S Conversion

Post by Fred Heiler »

Sounds like a wonderful conversion bike. I'm installing a '71 R75/5 engine and trans in my R60/2 frame, and everything has gone pretty well, except that the top of the cast air cleaner housing contacts the /2 frame.

How was that addressed on your conversion? I've seen a bunch of photos now that show the air cleaner housing fitting perfectly on top of the trans, and I'm guessing that most folks grind a little off the top of the housing, but I don't want to do that unless I hear there's no other way.

Looking forward to hearing from you, Fred Heiler
Fred Heiler: Chester Springs, PA
1967 BMW R60
1965 Porsche 356 SC, 1986 Porsche 911

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schrader7032
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Location: San Antonio, TX
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Re: My R69S Conversion

Post by schrader7032 »

Fred -

The spring 2005 issue of the club magazine has an article on putting a /5 engine into a /2 frame. There is a mention of clearance issues with the top of the air cleaner housing. However, it seems the author mentions a possible issue with the seat plate on the /2 frame. The fix was to remove the seat plate and weld into a different place to provide for clearance.

Just where does your engine hit the frame? I don't know the real estate very well, but it yours is touching the frame and not the seat plate, then maybe there's something else wrong.
Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.

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Fred Heiler
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Joined: Mon Aug 07, 2017 4:20 pm

Re: My R69S Conversion

Post by Fred Heiler »

My air cleaner housing touches the triangular bracket that's part of the frame, and it looks like it just needs another 1/8 or 1/4 inch of room. A seat bracket bolts to it, so I assume it's indeed the seat plate. I already had the frame powder-coated, so I don't want to do any welding or grinding on the frame.

Thanks so much for the tip about the conversion bike article. I'll read that thoroughly before I do anything more.

Thanks again, Fred Heiler
Fred Heiler: Chester Springs, PA
1967 BMW R60
1965 Porsche 356 SC, 1986 Porsche 911

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schrader7032
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Re: My R69S Conversion

Post by schrader7032 »

Fred -

Looks like you're between the proverbial rock and a hard place. I would not want to damage the existing filter covering, although maybe they're a "dime a dozen" somewhere. I can visualize some filter housings that were custom made and were more sloped at the back side. I think in that case, the customizer eliminated the housing for holding a filter and resorted to K&N pods instead.
Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.

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