I have a Birel R30 looks like this: http://www.twocycletechnology.com/BIRELR30.htm
INCLUSVE of a Woltjer Blueprinted KT100 and Horstman HDC-5 2-disc clutch. Does need rear caliper brake rebuild. Otherwise 100% race ready.
Can Send you pictures if interested. In NJ
Gene – 732-903-8878