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Front brake shuddering
Posted: Tue Dec 24, 2019 12:06 am
by 2003stellaDave
When I apply the front brake the is a strong vibration/shuddering thing going on. It’s slowly been getting worse. I took the front brake pads out and cleaned them with sand paper but the issue hasn’t changed.
2003 Stella.
Any thoughts? Anyone had this problem and fixed it?
Posted: Tue Dec 24, 2019 12:57 am
by Mr.FixIt
Are the brake discs flat? Warped discs can produce this phenomenon. It seems unlikely, but what else could do it?
Posted: Tue Dec 24, 2019 5:51 am
by 2003stellaDave
The disc is fairly new - about a year or so old.
Posted: Tue Dec 24, 2019 10:23 pm
by 2003stellaDave
Well I think I’ve found the problem. I have some “play� at the front suspension link.
So...... has anyone removed the front suspension pin before? According to the Service Station Manual there is a fixture (19.1.20021) to remove the pin. Is there an easier way?
Posted: Tue Dec 24, 2019 10:48 pm
by 2003stellaDave
After searching online for a while, I think this may be a problem that’s not going away anytime soon....
Posted: Mon Dec 30, 2019 4:23 pm
by whereshaldo
I feel like I may have a similar issue. Can you post a couple of the links about what you found?
Hal
Posted: Thu Jan 02, 2020 11:52 pm
by 2003stellaDave
Manual from Scooterhelp. Page 61 onward is useful:
https://www.scooterhelp.com/manuals/VNX ... .man.r.pdf
Video in Italian but very good:
https://youtu.be/Jyw9IYrFnjw
I’ve ordered some tools and parts and will post pictures here if I get a chance.
Posted: Sat Jan 04, 2020 8:56 pm
by Willie B
You might also check the headset bearings. This will also cause the front to shudder under braking if they're a bit lose
Posted: Sun Jan 05, 2020 11:21 pm
by 2003stellaDave
Willie B wrote:You might also check the headset bearings. This will also cause the front to shudder under braking if they're a bit lose
The headset bearings seemed Ok. Right now I’m thinking it was the two bearings in the caliper holder plate. I’m going to replace those, put everything back together and see how it runs.
Now I have everything apart, the fork suspension link seems ok.
Posted: Sun Jan 19, 2020 12:32 am
by 2003stellaDave
Well I fixed it. It was the caliper holder plate bearings that got rusty and needed replacing. I ride all winter here in the PNW and it rains a lot. From now on I will have to check the front end every spring to clean and re-grease.
This was the first time I’ve removed the fork. The most difficult part was getting the headset off the fork - it needs to be lifted a couple of inches to clear the top of the fork tube and all the cables/wiring loom is holding it back. Putting it back together was easier.
One tool I bought that came in handy was the “Steering Head Bearing Nut� by SIP (BU5420). It allows the nuts holding on the fork to be torqued properly.
The front shock on the Stella is a great quality product but the design gets in the way if of removing the caliper. And you need to remove the caliper if you want to remove the wheel hub...... so I’m planning on saving up and buying a new shock asap.