90mph wobble

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Sep 8, 2018 | 05:17 PM

#21

John CC

HDF Community Team

Joined: Aug 2018

Posts: 3,041

Likes: 1,212

From: New Hampsha

Quote:

Originally Posted by steves86ta

i havent touched or changed a damn thing, other than now im back in the bay area where it is cold and im actually wearing my jacket that was stored behind the windshield and not allowing any air to pass through

Quote:

Originally Posted by steves86ta

I've owned this bike since brand new, it has never done this and I've put a lot of miles on it

Was looking for a recommendation on what it may be.

Put the jacket back behind the windshield and see what happens...

Sep 9, 2018 | 10:39 AM

#22

Bikes111

Stage I

Joined: Dec 2017

Posts: 1

Likes: 0

From: Olympia WA

Thanks for the information and when I get a few more miles I will watch that front tire.

Sep 12, 2018 | 12:39 PM

#23

steves86ta

Thread Starter

Tourer

Joined: Oct 2014

Posts: 293

Likes: 27

From: Beaumont Ca

So an update

It does seem that the wobble was related to wind conditions and the weight on the bike..

I did go ahead and change the fork fluid to a lighter fluid. I did not like the "bounce" it had off a hard corner/lean

I did some research, and discovered that what matters is the viscosity at 100* C.

Accoridng to Spectro Oils the Harley Davidson Type E (stock for my bike) has a viscosity of 7.95@100C and a SAE weight of 20

The oil i put in was the maxima Vtwin 20 wt which had a viscosity at 100c of 11.3 and a sae weight of 20

I bought the fork oil level tool, and pulled them back apart and changed the oil to Maxima 10 wt (non-v twin its all they had) which has a viscosity of 7.7 @ 100C

this time i made sure there were no air bubbles and the oil level was exactly what the manual wanted

The bike rides better, and handles much better. Its a lot more responsive and im happy with the changes

I dont notice the wobble any more, but i havent had any strong winds since