Here is the Beginning of the BMW project! Follow along as We fix what needs fixing!
About 14 Months ago (in October 2009) I bought what is call a BMW /2 “Conversion” Motorbike. It is constructed from taking a /2 bmw chassis (1955-1969), and implanting a /5 Engine (1970-1973).
R69S The Top-of-the-Line Sport Model
A Conversion bike. Old Styling, with new Power
The benefits are increased power and reliability. The older engines didn’t have a modern oil filtering, or an alternator, and topped out at 600 CC.
After about a year of searching a found a bike that met my needs, it had already been “converted” It had been done in 1978, and had stopped running in 1987, and had been sitting in a barn ever since. Here are the pics i was sent of my “Barn Find”.
Fresh from “the Shed”The rare “cotton rag” Carbs! Well at least they are not just sitting open!
40k on the rusty clock
I called the guy that had if for sale, He had built the bike, he was a bike mechanic, He hot rodded it when he kept blowing up engines chasing Japanese bikes in the late 70’s.It was converted to 12 Volts from 6, The engine and trans were /5 the final drive was still /2. the carbs were off because he bought new Dellorto Carbs for it, but never put them on, then lost interest in the project. The Exhaust silencers were REAL Paul Dunstall, not copies. The 750cc engine had been punched out to 840cc using Venolia forged 10.5-1 Pistons, A high lift and duration cam by Sig Erson was then fitted. Some may remember this as marketed as the “Reg Pridmore Big Bore Kit”. He said it still ran well when put up. The speed equipment was more than i bargained for, but i figured since the boxer motor is fairly “modular” I could alway put it back stock if i had to. We agreed on a price, delivered to my secure-undisclosed location, I sent a modest deposit and awaited delivery……To Be Continued…….https://kirkusblog.com/2011/01/12/das-bike-projekt-delivery/
Kirkus's Blog 
Cool, nice to see ya got the blog up again kirk looking forward to seeing how things work out….
You’re making me want another motorsickle… Nice project. A buddy of mine has a garage FULL of old BMW’s, and has offered to lend me one to ride. I may take him up on that!
Nice! I wish we had barn finds like that here in China. Hell, I wish we had barns in China.
You do have warehouses full of old PLA bikes though, right?
hey i get it now! your photos are well done and work with your narrative.i like the overall look of the /2 as compared with the later slashes.i opted for a /5 myself and eventually made her pull an old ural car.i found the power to be lacking with this combination.i found some r90 barrels and heads and now she flies.i’m here in new bedford,ma.there are some great old engine rebuilders here and i had the barrels bored out and heads redone here.i like working on the old boxers.they are real confidence builders and give me great pleasure when fixed and ridden.your blog delivers that same feeling.are you running a 4 or 5 speed box?are you using the /2 or /5 final drive?
I have the 4 speed, (with kick) and the /2 final drive wich i re-built.
https://kirkus.wordpress.com/2011/02/24/das-bike-project-pulling-down-the-final-drive/
Yes, i do love the simplicity of the boxer, and how the whole bike is engineered.
This one is punched to 840, with 10.5 to 1 compresion, and a pretty lumpy cam, for my short amount of time riding it so far, I really enjoyed it.
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Excellent build! Love the styling. Thanks for posting on BMW /2 Conversion Face Book Page! I am going to post the side view shot again! Simply gorgeous!
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Does anyone know how to contact this person – my # is 7155710107
Thanks for buying her. I miss that bike!