Bad Vibration Not Good Vibrations.Lol

[john morrow]

Any advice on how to minimize vibration would be helpful..

 

[zippinaround]

Try jags spoke test , hold something long and thin against the engine like a spoke slowly rev up and watch for the spoke shaking but my guess is you will have to balance the crank

 

[crassius]

motor mounts are the usual cause of vibration - if rubber is used there, it will shake itself apart

 

[john morrow]

You are right about rubber I would never use it. I read about people using leather, anyone have any thoughts?

 

[Deleted member 12676]

these engines are designed with multiple problems to limit speed so they can be approved by more governments.
You have to take the crank out and balance it. see www.dragonfly75.com/motorbike/vibes.html

 

[zippinaround]

Best used a hard mount rubber , leather or anything softer then the engine won't work.

You are right about rubber I would never use it. I read about people using leather, anyone have any thoughts?

 

[john morrow]

Thanks Jag for all the info I will let you know how it turns out.

 

[crassius]

I like to use a piece of PVC on rear mount, and if needed, some as spacers on front mount. It settles in pretty quickly. I've used leather and it is good, but it needs a lot of tightening over time as it compresses into a good seat.

Sometimes moving the rear mount up or down just 1.4 inch can make a diff in vibration, and note also that if it is 4-stroking a lot before it runs in that can make is seem much less smooth.

 

[john morrow]

Are you talking about using PVC pipe? Please explain how you use PVC?

 

[crassius]

cut it so that it is in "C" section and put it between frame and rear mount - it will squeeze down to make perfect fit

a pic of how mounts look would be nice