Yamaha YCS1c adaptor plate for VAPE electric ignition

This is a 5mm spacer so a VAPE electrical ignition. The VAPE 78 33 799 00 is their kit for a 1973-1980 Yamaha RD200, and I think the closest fit for my Yamaha YCS1c, but it requires a backing plate so the magneto kit sits correctly in the engine where the old Generator was mounted.