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Old 09-10-2008, 01:09 AM   #46
Nick Makwell
Bavarian Murder Weapon
 
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I have a cunning (read outrageous, probably never happen) plan to shoehorn an 1100S or R1200(hexhead) motor into a modified /5 frame, mounted to a supercharger where the alternator is.......

why?

modern day R51SS....

the boxer motor is crying out to be supercharged...again
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Old 09-10-2008, 01:55 PM   #47
jedcaum
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Quote:
Originally Posted by Beemerboff
I wonder how the /2 final drive stands up to the 1200 power-------.
Probably last twice as long than with the original R50/2 motor.

Have you ever driven a vw? Power, he says!

My $.02. Would I do this if I could? I don't know, but I'm pretty sure I couldn't. So it's cool in a "what the hell!" sort of way . It might even be fun to drive, bad brakes and all. But I also think the lines of the /2 are just about perfect the way they are, and I agree that of all the engines to put in there, that's the one I would hesitate the most to use. In addition to the mechanical challenge, it just doesn't look right.

I'm currently cramming an R90 engine into a /2 frame, and the aesthetics aren't completely off, but I am definitely trading looks for reliability, and I know it. I'm under no illusion that it looks as Bavaria intended it.

He made a similar aesthetic compromise, but I'm not sure that he even got reliability out of the deal, as I imagine there are a whole host of one-off solutions that went into this feat of engineering. Still gotta give props for the skills, though. Mad skills. And maybe that was the point.
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Old 09-11-2008, 11:46 AM   #48
/2killer
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I thought this thread would have died a while ago. Thanks Recht for posting it (I think).
Thank you very, very much to all that like my bike.
For those of you that have concerns or don’t understand, I’ll try to explain.
I’ve restored a few /2’s and they are great bikes but a bit slow. I was getting tired of mini vans trying to kill me. Lots of people have done later airhead conversions and some have done VW. These new motors offer great power and technology for little money. If you’ve ever ridden the new bikes side by side with the old, they all feel similar – they should, their all flat twins. The early /2 airheads show their displacement disadvantage very clearly but the later airheads and the oilheads are pretty close. The biggest difference is that the new motor is a bit stronger off the line and keeps making power all the way to a higher redline (I’ve bounced mine off the rev limiter a few times).
This bike runs and rides great - it’s a blast to ride and handles fine with koni’s on the 4 corners – stops good too with the /5 hubs and better shoe material. No stretch to the frame, just wider at the bottom. I don’t think the motor is any heaver after picking it up maybe 100 times. Reliability wise, /2 frames and forks can handle sidecar duty, which BMW dropped with /5 production. The driveline is a stock R1150RT engine and 6 speed with a larger dia. drive shaft drive and a final drive from a /6 or /7 (33/11) with deeper splines on the /5 hub (which I had to offset to get the wheel centerline right wit the bigger swing arm).
Overall it’s more usable than any /2 or conversion I’ve ridden, no matter if your going fast or slow
As for the proportions – You would need to see the bike in person – everyone who has is surprised at how “normal” it looks.
Regarding donor parts - No /2 trailer queens were killed to make this one – This R50 spent many years outside before I got it. Even the sport tank was underbid on ebay.
I know it’s not “authentic” – I was kind of shooting for that.
The whole kissing your sister thing just sounds wrong!!!
I don’t think it’s “soulless” but it sure is “slingerless”
Bottom line, for those that don’t like, I built it for myself. The fact that anyone sees it, good or bad, is an unavoidable consequence. At least /2 and conversion owners that don’t like it only have to see me for the brief moment that I pass them.

/2killer screwed with this post 09-11-2008 at 11:51 AM
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Old 09-11-2008, 12:07 PM   #49
Putts
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First, mad props to your technical skills.

Next, no matter what anyone thinks about the bike, I'm damn sure they'd all like to see a few more if you got 'em. 'Specially the one-off mechanical bits ... bloody knuckle pix also worth extra points.

Finally, I'm with Stagehand, it's faaaaabulous baby! It's your bike, and you done good.
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Old 09-11-2008, 12:30 PM   #50
drhach
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Quote:
Originally Posted by /2killer
... I built it for myself. ...
I guess that's the bottom line isn't it?
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Old 09-11-2008, 02:15 PM   #51
Recht OP
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Quote:
Originally Posted by /2killer
I thought this thread would have died a while ago. Thanks Recht for posting it (I think).
Welcome to the forum.
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Old 09-11-2008, 02:34 PM   #52
notarex
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Hey guy- don't take my comments too seriously . I may think it's icky, but I'm also intrigued and impressed. I'm sure fans and haters alike would appreciate any more pics of the construction phase of your bike. I agree that the difficulties of operating vintage bikes on todays roads with todays D-Bags behind the wheel can call for desperate measures.

P.S. I will be posting photos of my "Slash 5/Grocery carriage" hybrid later this week .
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Old 09-12-2008, 08:41 AM   #53
C Squared
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I love the bike. I'd buy the bike!
But, I like to build my own stuff.

Welcome....
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Old 09-12-2008, 10:00 AM   #54
JT Lake
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Keep up the good work brother!!
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Old 09-13-2008, 07:08 PM   #55
65bmwr50
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I liked it

I am in the process of doing a restoration/clean up on a r50/2 and I like the orgininal lines, but that is fascinating. The fact that he used the orgininal final drive also is an interesting choice. It is just like any other hotrod AFAIAC.
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Old 09-14-2008, 05:03 PM   #56
wirewrkr
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Quote:
Originally Posted by 65bmwr50
I am in the process of doing a restoration/clean up on a r50/2 and I like the orgininal lines, but that is fascinating. The fact that he used the orgininal final drive also is an interesting choice. It is just like any other hotrod AFAIAC.
He didn't use the original, it's a final drive from /6 or /7
a much stronger, better choice by far.

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Old 11-20-2008, 11:07 AM   #57
storymitchell
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A friend just sent me this photo

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Old 11-20-2008, 11:12 AM   #58
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nice photoshop
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Old 11-20-2008, 11:34 AM   #59
drhach
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Quote:
Originally Posted by ADK
nice photoshop
It almost looks right.
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Old 11-21-2008, 12:21 PM   #60
Joe Bar
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Quote:
Originally Posted by drhach
It almost looks right.
Only needs a radiator and it might run
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