2012 GL 1800 with a CSC Viper Conversion at 10.5 K developed an oil leak. I figured I had a leaking input shaft seal on the rear differential. Turned out to be red oil, HMMM, definitely not rear end oil. Bummer, the mono shock has blown a seal. The good folks at CSC are sending a new shock and spring to the Honda dealer and covering the repair under warranty.
Thanks to California Side Car for standing behind their product.