7 Support Tickets in 4 Months — Now a Drivetrain Issue Stark Says is Tires. It Isn't.

[Erwin P]

Well how about a simple test then?
Take of the chain and rev to the speeds you have the vibrations. If it's still there it's the motor/gearbox.
If not, it's wheels/chain/suspension etc.

 

[Chaconne]

I offered, and Stark support said they wouldn't make a significant contribution.

How much would it be? Seems like a trivial thing? I would try @Erwin P 's suggestion then. You get a lot of suggestions here some might work some not. They are typically not engineered solutions but rather experience based. And that can sometimes be far more helpful.

 

[AbnormalWrench]

This. It is pretty basic engineering, and I am surprised to hear all the backyard mechanics and expert opinions in this thread. I just don't want to have to explain it.

Classic engineer attitude. I've been a mechanic for almost 30 years, but since you're a genius, I'm not sure why you're asking us hicks for advice....?

You might be surprised to find out, some of us know things we can't bother explaining to you.

 

[Lost]

Classic engineer attitude. I've been a mechanic for almost 30 years, but since you're a genius, I'm not sure why you're asking us hicks for advice....?

You might be surprised to find out, some of us know things we can't bother explaining to you.

Just reread the thread. I've come to the conclusion that OP doesn't actually want to test what the issue is, but a smoking gun ...