Shimmy

[DEEBS11]

[Ccitis]

There's a difference between static balance and dynamic balance. Static balance would be putting the tire and rim on a truing stand then using weights to balance it. Dynamic balance uses one of those newfangled machines that spins the tire up to speed and gives the operator the info they need to properly place the weights.

With all that said, I don't bother with either method and use this stuff instead, it doesn't work for squat when it comes to punctures but does a great job at dynamically balancing as you ride. A LOT of shops are using it these days instead of other balance methods and for about $20 per tire a DIY guy like me can easily not give it second thought.

https://ride-on.com/

Interesting... and works on tubes?

Shinkos were not my choice, PO had them on... and they were brand new so figured might as well. Pumped the tires up to 38, still have the vibration. Fork pressure is 10 on each side... I noticed I get the same vibration on hard braking. I can see the fork flexing back and forth from front to back when I hit the front brake hard. Strange. No notchiness in the steering bearings, bars fall to the side as they should. Might be replacing wheel and steering bearings next though to try and figure this out.

[LenB]

Ccitis - you're likely on top of this, but I'll just mention it anyway. Be sure your front axle clamp is tight to the base of the fork slider at the front and the gap is at the rear. This slight variation can really mess up your front end by throwing off your handling, possibly having and effect on gyroscopic precession at high speeds.

[Ccitis]

Ccitis - you're likely on top of this, but I'll just mention it anyway. Be sure your front axle clamp is tight to the base of the fork slider at the front and the gap is at the rear. This slight variation can really mess up your front end by throwing off your handling, possibly having and effect on gyroscopic precession at high speeds.

I am trying to understand this... all advice is welcome. You are saying on the left side where the clamp is, there should be a gap?

[LAB3]

Interesting... and works on tubes?

I've used it on tube tires

What LenB wrote has merit. Take a look at where the fork clamp meets the axle. The front edge of the clamp should sit directly in contact with bottom of the fork leg, there should be a gap left on the rear side of that. The front nut gets tightened down first and the rear nut after that.

[Schming]

I've used it on tube tires

What LenB wrote has merit. Take a look at where the fork clamp meets the axle. The front edge of the clamp should sit directly in contact with bottom of the fork leg, there should be a gap left on the rear side of that. The front nut gets tightened down first and the rear nut after that.

Torque specs for above mentioned: https://www.manualslib.com/manual/11...age=232#manual

[Ccitis]

I've used it on tube tires

What LenB wrote has merit. Take a look at where the fork clamp meets the axle. The front edge of the clamp should sit directly in contact with bottom of the fork leg, there should be a gap left on the rear side of that. The front nut gets tightened down first and the rear nut after that.

Got it. Will check and torque appropriately

[LenB]

Just like this....

[Ccitis]

Rechecked all the torque specs from top to bottom. All is in order, still getting the vibration. I am wondering about the tire itself. For now will just keep to slower speeds I suppose.

[skids]

Check the trailing arm bearings for torque spec. Be aware of the typo in the clymers.

[DEEBS11]

Clymer XS1100 manual Page 222. It's the torque spec for the swing arm pivot shaft bolts. It's listed as 47 foot pounds but should be 47 inch pounds.

[Ccitis]

Clymer XS1100 manual Page 222. It's the torque spec for the swing arm pivot shaft bolts. It's listed as 47 foot pounds but should be 47 inch pounds.

Will check today. Why do you think Swing arm pivot would impact front vibration?

[DiverRay]

If the swing arm, in the rear, isn't doing what it's supposed to do, it can effect the front suspension.

[DEEBS11]

Wobble in the back - wobble in the front. The steering head acts like a hinge. This is why I suggested the balance of the rear tire. Very often overlooked.