Head shake

SirJAG · Sep 25, 2020

Getting a LOT of head shake when shifting at red line in second third and fourth gear

It feels like the rear end is squatting too much and unloading too much weight from the front so I’m assuming I should increase the compression on the rear shock or increase the rebound on the front

hoping I can get a few pointers here

Jag

Sent from my iPhone using Tapatalk

Dezi · Sep 25, 2020

Have you set the sag for your weight ? Good place to start fettling .

SirJAG · Sep 25, 2020

Dezi said:
Have you set the sag for your weight ? Good place to start fettling .

28 mm front
29mm rear

210 lbs in all gear.

The odd thing is I had to take out almost all the pre-load on front

10 mm preload rear instead of (12 is baseline according to manual)

At P setting (moved from F because bike felt so bouncy. Like it was gonna buck me at highway speed over humps/dips. Also I made this change BEFORE my sag was set ((I’m dumb right)) so thinking of going back to F.

Jag

Sent from my iPhone using Tapatalk

SirJAG · Oct 11, 2020

Head shake was eliminated by a couple things.

1 - loosened the front axle pinch bolts, spun tire, grabbed front break and the axle moved a couple mm. So had a slight bind there.
2 - rear shock had 65 lbs of N2, added enough to bring to 175 lbs per Suspension guy recommendation (812 suspension Austin TX)
3 - dialed in suspension 35mm sag front and back, was trying to get to 20ish on my own and that wasn't helping anything.
4- riding position, need to hook your feet into the rear sets to prevent sliding backwards and thus inducing increased hand pressure on the bars.

all this together has eliminated the headshake. updating so that others can possibly learn from this.

p.s. i'm 206 lbs with all gear

JAG

bradp51 · Oct 19, 2020

SirJAG said:
Head shake was eliminated by a couple things.

1 - loosened the front axle pinch bolts, spun tire, grabbed front break and the axle moved a couple mm. So had a slight bind there.
2 - rear shock had 65 lbs of N2, added enough to bring to 175 lbs per Suspension guy recommendation (812 suspension Austin TX)
3 - dialed in suspension 35mm sag front and back, was trying to get to 20ish on my own and that wasn't helping anything.
4- riding position, need to hook your feet into the rear sets to prevent sliding backwards and thus inducing increased hand pressure on the bars.

all this together has eliminated the headshake. updating so that others can possibly learn from this.

p.s. i'm 206 lbs with all gear

JAG

Hi
Which way did the axle move ?
Dave moss has a good YouTube for steps tightening front wheels after removal

SirJAG · Oct 19, 2020

The axle was protruding out the right side of bike, after alignment it moved about 2-3mm inwards.

bradp51 · Oct 19, 2020

SirJAG said:
Head shake was eliminated by a couple things.

1 - loosened the front axle pinch bolts, spun tire, grabbed front break and the axle moved a couple mm. So had a slight bind there.
2 - rear shock had 65 lbs of N2, added enough to bring to 175 lbs per Suspension guy recommendation (812 suspension Austin TX)
3 - dialed in suspension 35mm sag front and back, was trying to get to 20ish on my own and that wasn't helping anything.
4- riding position, need to hook your feet into the rear sets to prevent sliding backwards and thus inducing increased hand pressure on the bars.

all this together has eliminated the headshake. updating so that others can possibly learn from this.

p.s. i'm 206 lbs with all gear

JAG

Hi
Which way did the axle move ?
Dave moss has a good YouTube for steps tightening front wheels after removal

SirJAG said:
The axle was protruding out the right side of bike, after alignment it moved about 2-3mm inwards.

Just reading through the thread again. By way of feedback I have only used Flat on the rear shock on tracks which are always nice and smooth. On the street which is the majority of riding it is always on Progressive. A lot of the back roads are pretty bumpy here in Oz. Lot nicer roads in the US from what I remember.

Head shake

Help Support Ducati Forum:

SirJAG

Dezi

SirJAG

SirJAG

bradp51

SirJAG

bradp51

Similar threads

Register CTA

Recent Discussions