I've been experimenting with these for about 2 months now and decided that it's time to share and hopefully get some user feedback. Personally I've experienced approximately a 40% decrease in overall vibration with my 50cc Gila. Handlebar vibration decreased much more, foot peg vibration not as much, but still a very noticeable change. Definitely no plans to return to the stock setup.
Purchase and modification instructions are attached.
Should you decide to give these a try please post your results. The bushings fit the stock engine mounts and most likely fit the mount on the Malossi cases. The white plastic spacer bushings are still used when mounting the motor.
FYI I've only tried these with a 50 kit, but will be running them with a 70cc Malossi very soon.