The New And Improved Unofficial R65 Forum V2
Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: steve_wicks on July 24, 2009, 01:19:24 AM
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I've got a wicked idea ......
During my travels yesterday I came across a 1100 that had been in quite a severe front end accident with lots of frame, telelever damage but the motor is okay apart from squashed r/h exhaust and bad suffing of the left pot.
It was crashed about 3 years ago and the owner was going to fix it but the cost (and scarcity) of replacement used frames made it not worthwhile.
Engine does not start as there is no life in the battery and obviously no fuel, but he assures me it was running fine after the accident.
Will this fit, without too much work, into an R65 using the R65 gearbox or driveshaft etc?
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I don't think so, the engine as well as the drivetrain are quite different. How are your fabrication skills?
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I like the idea of the project.
How much work is too much though?
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Be the first - become an expert.
Dont trash a perfectly good bike though.......
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The oilhead bikes use the engine as a stressed part of the bike, the front and rear suspension bolt to the engine, rather than the engine sitting in a tube frame .
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What Bob said, plus the oilheads are paralever bikes so just mating up a drive train would be a monumental challenge. But then again, nothing is mechanically impossible if you throw enough money at it. You could probably part out the engine on ebay or to a place like Beemerboneyard and keep your R65 running for quite a while with the proceeds.
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I realise the drive train is totally different ...I was thinking more of dropping in the engine and mating it to the existing R65 'box.
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You would need to get an adapter to go between the engine and transmission, because the transmissions are a completely different shape, where they mate to the engine .
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The transmission from the R1100 would have to go with the engine - the oilhead casing&block mounting points are totally different from the airhead's for hanging a transmission on it - as others noted the engine is a stressed part of the frame and doesn't just "live" inside a frame.
IF you think that doing transmission input spline lubes on our little airheads requires alot of disassembly - you should see what is left when performing the same service on an oilhead (hint: a whole lot more stuff is taken apart)..
Again, anything is possible with enough skill and money - but that is one project that would take a lot more of both than what I'd be willing to provide, personally speaking.
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Hey Steve, is the final drive on the unit in good condition and is it for sale? I'm thinking with two R1100's to maintain I'm going to need a replacement eventually.
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Damn, Phorqs, can you imagine what shipping on a final would be from waaaay down there!!?? :o
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Yes, and have you priced new ones lately? :-X The seals in the final drive will eventually give out and replacing them costs as much or more than buying a new final drive. That's why used final drives for the 1100's are so hard to find.
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Have you thought about converting it to a chopper????
[smiley=flamethrowingsmiley.gif]
Lou
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go you dude. i'm currently trying to find out if i can drop a r100 ingine in my '65 frame, its gonna be a beast! good luck man, don't let anybody tell you "you can't"
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The BMWMOA News had a piece an issue or two back about an Oilhead/slash2 conversion. If you can put one into a /2 anything is possible.
Phil Brown
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Harrison, yesterday I was looking at a R90 race bike; he had the motor installed with the frame tabs above the frame tubes, not below like stock. It probably put the motor about an inch or so higher than stock for greater ground clearance. That would probably be a good idea with the R100 in the R65 frame but I don't know what else would be needed to make it work.
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Hey ... great minds think alike. In the 3nd bike post in the Chit Chat page I suggested a R100 or R80 motor in an R65 frame ... I like the R65 size!
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Like anything to do engineering wise, it is only a money problem.
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Here are a couple of [FRIGGING BEAUTIFUL!] examples of the "impossible"...
(https://bmwr65.org/smf/proxy.php?request=http%3A%2F%2Fwww.pbase.com%2Ftomfarr%2Fimage%2F116562278.jpg&hash=88e1b7d6bbef30163c5a01f8c71df43cbe44bc45)
(https://bmwr65.org/smf/proxy.php?request=http%3A%2F%2Fwww.pbase.com%2Ftomfarr%2Fimage%2F116562276.jpg&hash=fc0ee0a7d2a045fa718ebe0a3b8043f43a4d1f9b)
I know nothing else about these.
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Unbelievable Rob...now that's the spirit!! I can't wait to follow this thread!
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Any Progress?
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Well, I've been told the K75 engine-bike is a Photoshop job.
I think the oilhead is real, though.
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Wonder if they could photoshop some disk brakes onto that R1100!
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I put a R65 front wheel and single-disc brake system on my conversion.
It worked very well.
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Under magnification, the K75 engine is definitely a photoshop job, but certainly one worthy of 5th Avenue or Playboy. The Oilhead is curious, it is either an extraordinarily good photoshop job, or it is genuine.. I can't figure how they've attached the engine to the frame, though. On the oilhead "frame", it would be attached from above and towards the front at the big Y-arm for the telelever. How they managed to hide that all so well underneath that R60 or /2 tank - and strengthened the upper part of the frame to take the load, I don't know.
Metallurgical wizadry, indeed !
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I think the R1100 is a photoshop job. Look at the offside drive shaft. Too small for the 1100.
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awaffa2003,
An R100 engine will go into an R65 frame. However your R100 engine must be a similar age to your R65 gearbox to make things easy.
You will need R100 carbs and exhaust as well, and an R100 final drive.
If you are concerned about ground clearance with the longer cylinders, fit an 19inch snowflake at the front and the slightly longer shocks from the R100 at the back or just up the preload on your existing shocks.
Although I have both an R100 and an R65, I cannot find it in myself to break up either of them.....
Steve H
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Looking at the photos attached, the r1100 has my vote for real.
I can see the engine mounts on the front top of the 1100 engine. The gearbox fills the space appropriately and the shade and light match on both the frame/seat and the engine gearbox. 8-)
The K is another story entirely with bad saturation and artifacts in the engine image and points like engine mounting and wtf the original /2 airfilter? The K75 engine was cut from another pic and pasted over the top of the /2 engine using the header of the exhorst to match up with the original muffler. It's cute on first glance but a second look soon debunks it. Any way what does the /2 need the abs gubbins behind the engine for on the drums? ::)
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If it is real, I'd like to know how the old drive train handles the 80ish horsepower of the oilhead engine .