Boxerworks.com

here is what i have done: new starter relay. new plugs/wires. fresh oil. fresh gas. new points, new condenser. timing adjusted statically to "s" mark. points properly gapped. Did you try to start it before replacing the starter relay, points, plugs, wires and condenser? The reason I'm ask...

vanzen wrote: The diagonal would be welded across the top, from 1 upper sub frame mounting to the opposite side existing cross brace/seat mount.
Gusseting at the 4 corners would also work.

Can anyone show me a photo or illustration of these two braces? I can't quite picture them from the description.

I think I understand what Kurt is saying about the distortions that may be occurring in the mainframe. He is suggesting there may be a sort of "flattening" of the rectangle under certain loads, in which the upper left corner (as viewed from the right side of the bike) is forced closer to t...

What's the consensus on why/where the flex occurs? I keep hearing that airheads have some flex-induced wobble, but I've never heard exactly why, or what part of the bike is most responsible for it. I'm building a 1976 R90 right now (my first BMW), and I'd like to try to address any inherent handling...

Here's a photo of a racebike with an interesting brace between the motor and frame. http://i5.photobucket.com/albums/y178/pommiejohn/brace.jpg I wonder if it transfers a lot of vibration to the handlebars, footpegs, and so forth. It looks like there are also some diagonal braces welded in the aft se...