Race to Rebuild: The BMW R90/6 Part 2

After deconstructive surgery, the transformation of our 1974 BMW R90/6 starts.

| November/December 2012

  • BMW-R906-Right
    The 1974 BMW R90/6 as purchased.
    Photo By MC Staff
  • Working-On-BMW-R906
    Associate editor Landon Hall (left) and tech Q&A man Keith Fellenstein at work pulling apart our R90/6.
    Photo By MC Staff
  • BMW-R906-Pieces
    Our R90 in pieces.
    Photo By MC Staff
  • BMW-R906-Pushrod-Tube-Seals
    We'll need to repair split pushrod tube seals.
    Photo By MC Staff
  • BMW-R906-Engine
    R90 engine, will get a reseal to correct split pushrod tube seals and oil leaks from failing rear main seal.
    Photo By MC Staff
  • BMW-R906-Wiring
    A previous owner clearly loved doing their own wiring.
    Photo By MC Staff
  • BMW-R906-Rear-main-Seal
    The failing rear main seal needs to be replaced.
    Photo By MC Staff
  • BMW-R906-Center-Stand
    Center stand pivot bolts missing spacers and washers; it’s a wonder the center stand stayed in place.
    Photo By MC Staff

  • BMW-R906-Right
  • Working-On-BMW-R906
  • BMW-R906-Pieces
  • BMW-R906-Pushrod-Tube-Seals
  • BMW-R906-Engine
  • BMW-R906-Wiring
  • BMW-R906-Rear-main-Seal
  • BMW-R906-Center-Stand

Deconstructive surgery is fun. Compared to the exacting process of carefully assembling bits and pieces into a functioning whole, there’s huge and immediate satisfaction in taking something whole and, scant hours later, ending up with a pile of parts scattered around the shop. Ahh, progress!

It’s a good thing we think that way, because deconstruction definitely defines the current phase in the Motorcycle Classics/Dairyland Cycle Race to Rebuild.

Chalk it up to an insanely busy summer, but we’re running a good month or more behind schedule. If things were going right, by this time we’d be showing you sketches and already acquired pieces to define the projected end product in our build.

That’s not to suggest we haven’t made any headway. In a break from previous builds where we’ve just jumped in whole hog, discovering what surprises awaited us as they presented themselves (the holed piston and trashed forks on our CB500 project come to mind) this time we’re heading into our teardown phase with a little more care. We really do learn from our mistakes. Maybe.



For example, we know we’re going to give the engine on our 1974 BMW R90/6 some mild massaging. Nothing radical, mind you, just a few fun and sensible upgrades to give the bike a bit more personality and a leaner look with the benefit of enhanced performance. When it comes to the engine, we’re looking at items such as upgraded carburetors and filters, a custom exhaust and electronic ignition.

On the bench

Since we want to inject a little extra oomph into our Beemer, we decided it’d be fun to put the BMW R90/6 on a dyno so we can document how our project bike ran when we got it against how it runs when we’re done. Fortunately, local dyno expert Kent Clawson likes us, and agreed to take our bike through a session on the chassis dyno.

BETH BEAVERS
11/30/2012 3:41:43 PM

Here's the link if you want to go directly to the sign up. Just copy and paste it into your browser: http://bit.ly/J563xC


Anonymous
11/29/2012 4:29:08 PM

Is there some way to sign up for the bike's drawing without having to join Facebook? Can't we just use our MotoClassics account?







Ride 'Em, Don't Hide 'Em Getaway

Classic Motorcycle Touring and Events.


The latest classic motorcycle events and tours.

LEARN MORE