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Show your crash bars…
- schrader7032
- Posts: 9016
- Joined: Fri Oct 27, 2006 3:00 am
- Location: San Antonio, TX
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Show your crash bars…
http://w6rec.com/duane/bmw/crashbars/index.htm
Here's a picture of a safety bar that's similar to what's on my R69S:
http://www.realoem.com/bmw/showparts.do ... g=46&fg=70
It has u-bolts in four locations where it crosses the frame. The outside diameter of mine is about 24mm.
Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
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- Posts: 503
- Joined: Fri Oct 27, 2006 3:00 am
Re: Show your crash bars…
If your bike has a front frame similar to 1955-on /2, crash bars should be available new or used, with no need to build them.
The crash bars protect the valve covers, not the cylinders. Cylinders can be torn off, but the impact required to do this is far beyond the capability of a crash bar to prevent.
The valve covers can be scratched by a tipover on a hard surface, or ground down if the bike low-sides and slides on pavement. Crash bars will be the first to contact the ground, but as Duane's page notes, there is a danger that the sliding crash bar will catch on the ground and flip the bike, where the bare valve cover would slide smoothly . And the crash bar does not protect the rider.
Another problem with crash bars is their economics. Except in a tipover, the crash bar is ground down, if not bent, in a slide and so must be replaced. A crash bar costs more, and can be more difficult find, than a valve cover. That was the case with my /2's and is may be true for your R51/3.
I ordered a crash bar for my first R27 in 1966, but after that, I never used them again.
- Micha
- Posts: 759
- Joined: Fri Oct 12, 2007 2:24 am
- Location: Israel
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Show your crash bars…
I dropped the bars idea.
Cheers, Michael.
R51/3 1952
Engine Nr. 529466
Show your crash bars…
Thank you all in advance.
Micha.