Vibration issues

[47chief]

Hello all, new to the trike community. I've been riding 60 plus years, all makes, all sizes.

Having purchased a 2008 HPN with a Roadsmith conversion early this year my test drive was limited to city streets, low speeds.

I've noticed a concerning vibration at higher speeds, starts @ 35 or so on up to 60 where it backs off. Pulling in the clutch at speed - vibration remains.

So, changed u joints, no improvement. They were scored from lack of lube.

Discovered someone had installed winter car tires - changed out yesterday, no improvement. wheel bearings were loose. retorqued to spec.

My question is this : what is the procedure for CV joint to determine if it's bad?

I've talked to a Doug at Roadsmith ( who is extremely helpful) and agree that the CV is rarely the problem as are the wheel bearings. But i want to eliminate all possibilities.

Differential ?

I was thinking of replacing the drive shaft as a what if ??

Thank you, ride safe, Dave

 

[Deplorable]

I would double check front tire condition, cupping and balance. Make sure it is properly installed and nothing loose like pinch bolts and caliper bolts.

I would also confirm the rear wheels are properly balanced and they are properly installed, not bent or damaged.

 

[47chief]

Thank you for the reply. New rear tires as stated, front as well. the vibration is down below. I think a new drive shaft might help ??