I have a 75' RD350B US Spec. The front end vibrates so much after 5K RPM; that my hands and elbows hurt. Low end of the RPM band is fine. I bought it this way 3 years back but was too excited to care then 
This is what I did:
1. It was missing a rear engine mounting bolt. I bought an OEM piece off a part-out bike hoping it would fix the issue, but it didnt affect the vibration even a tiny bit.
2. It was also missing the rubber dampers in the cylinder head/fin. I bought the whole kit off yambits, installed it and again, it didnt help 1 bit.
It came with a DG pipe, 210 main jets, and uni filter, rest is stock. How can I get rid of this vibration?
This is what I did:1. It was missing a rear engine mounting bolt. I bought an OEM piece off a part-out bike hoping it would fix the issue, but it didnt affect the vibration even a tiny bit.
2. It was also missing the rubber dampers in the cylinder head/fin. I bought the whole kit off yambits, installed it and again, it didnt help 1 bit.
It came with a DG pipe, 210 main jets, and uni filter, rest is stock. How can I get rid of this vibration?