Vibration dampener

[bs8c]

I just took off my carburetor and i saw one of the pieces that hold the engine tight to the frame of the bike... so i got the idea to put a tough rubber between the frame of the bike, and the engine. Here are some pictures about what i did, tho..i`m not realy sure if it`s a good idea because if i put dampener on one of the pieces that hold the engine, does that mean that because of it, the other pieces that hold the engine will get more stress?
anyway, here are some pictures.
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Let me know what u think :)

[Zorge]

I do not know is this your dampeners will work, but I know that every time I use bolts on something elastic, I needed self-locking nuts. All other methods are not able to prevent them from self loosening.

[bs8c]

I already used 2 nuts, screwed tight to eachother so it shouldn`t be a problem(I will monitor their behaviour tho).