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Found some great pics of a very rare RG500 powered sidecar racer. This is actually the first RG500 sidecar that I have seen. It was raced in the GP's in 1979. The chassis was made by Klaus Sprengel of alloy plates he bought from Louis Christen (LCR). The RG500 is a works engine with Bartol cylinders.
For more pics see
Suzuki RG500 sidecar racer