rsvr.net Forums Homepage
Forum Home Forum Home > RSV / RSVR / FACTORY > General Chat
  New Posts New Posts RSS Feed - front wandering
  FAQ FAQ  Forum Search   Events   Register Register  Login Login


front wandering

 Post Reply Post Reply
Author
Message
Vee60 View Drop Down
Premium Member
Premium Member
Avatar

Joined: 17 Oct 2011
Location: Gloucestershire
Status: Offline
Points: 673
Post Options Post Options   Thanks (0) Thanks(0)   Quote Vee60 Quote  Post ReplyReply Direct Link To This Post Topic: front wandering
    Posted: 17 Sep 2021 at 11:24
Got the new RSVR today.  Nice example, really well looked after.

Took it for a 30 mile run on A roads and some twisty B roads.  New tyres on so took it steady.  Fitted with Dunlop Sportmax tyres.  There's an issue though...it won't hold a straight line, especially at slow speeds.  It wanders side to side and under braking.

I stopped and checked steering damper, which was wound on too much, thinking that was the issue. Reducing it to one click in from fully out (my preferred setting on my other RSVs) helped a lot but it's still doing it and driving me nuts.  Takes muscle and concentration to get it to stick to a line and under braking.

I checked fork settings and they're set down with 4 notches showing, over the standard setting (I think) of three notches.  Suspension feels really plush so haven't altered it.

New sportsmax  tyres I don't like much.  Not huge feedback, flattish profile and I suspect they may be part of the problem.  Any ideas?
Ducati 950S Supersport

Back to Top
426hemi View Drop Down
Premium Member
Premium Member

owner of the big bore!

Joined: 30 Mar 2012
Location: cannock
Status: Offline
Points: 5795
Post Options Post Options   Thanks (0) Thanks(0)   Quote 426hemi Quote  Post ReplyReply Direct Link To This Post Posted: 17 Sep 2021 at 12:15
Check headstock bearings, if they’re worn or over tight can cause this and tyre pressure.
Back to Top
Bladerunner919 View Drop Down
Premium Member
Premium Member


Joined: 19 Mar 2020
Location: Bracknell
Status: Offline
Points: 405
Post Options Post Options   Thanks (0) Thanks(0)   Quote Bladerunner919 Quote  Post ReplyReply Direct Link To This Post Posted: 17 Sep 2021 at 12:21
I'd second looking at headstock bearings - if you take your hads off the bars when riding, does it run straight and true, or does it shake its head?
Back to Top
Stevex View Drop Down
Moto GP Alien
Moto GP Alien
Avatar

Joined: 05 Jul 2016
Location: UK
Status: Offline
Points: 1481
Post Options Post Options   Thanks (0) Thanks(0)   Quote Stevex Quote  Post ReplyReply Direct Link To This Post Posted: 17 Sep 2021 at 12:40
Is the steering damper an Ohlins?
If so, disconnect the ram eye end and see how easily it moves by hand, especially the force required to start movement.
I had a problem with my Tuono which had an Ohlins damper fitted and started tram lining; traced it to the Ohlins being very stiff to start moving, which in turn is caused by the bushings drying out.
If this is the cause the damper will need a service...that'll be £100+ please sir, which is why I sold it and refitted the original.
People say I don't know Jack Sh1t; but I do, he lives next door.
Back to Top
Vee60 View Drop Down
Premium Member
Premium Member
Avatar

Joined: 17 Oct 2011
Location: Gloucestershire
Status: Offline
Points: 673
Post Options Post Options   Thanks (0) Thanks(0)   Quote Vee60 Quote  Post ReplyReply Direct Link To This Post Posted: 17 Sep 2021 at 15:04
Yes, it's a factory standard Ohlins.  I suspect the steering damper as the most likely culprit and was going to remove it as tbh, my last one had it adjusted all the way out anyway.  The bike has been laid up for several years so I reckon it's dried out or got stiff and not been serviced in 20 years, but the bike has only covered 6K miles from new (MOTs back up the mileage). I'll remove it, take it for a ride and if all is ok, I'll simply leave it off.  Only other thing it could be I think is steering head bearings but again, at 6k miles, unlikely.
Ducati 950S Supersport

Back to Top
wigginsjp View Drop Down
Premium Member
Premium Member
Avatar

Joined: 11 Feb 2008
Location: calne
Status: Offline
Points: 3485
Post Options Post Options   Thanks (0) Thanks(0)   Quote wigginsjp Quote  Post ReplyReply Direct Link To This Post Posted: 17 Sep 2021 at 16:17
I’m addition. 

I’d also check the dog bone and rear bearings. 

If they are tight or seized they will make it wander from lack of movement. Eyelets on the rear shock too. 
Aprilia RSVR Factory 2007 V2 1060cc Big Bore
Aprilia RSVR Factory 2004 Race Bike
Kawasaki ZX10R 2007 Race Bike
Aprilia Tuono V4 1100 Factory 2020
www.apriliaperformance.co.uk
www.apworkshops.co.uk
Back to Top
Vee60 View Drop Down
Premium Member
Premium Member
Avatar

Joined: 17 Oct 2011
Location: Gloucestershire
Status: Offline
Points: 673
Post Options Post Options   Thanks (0) Thanks(0)   Quote Vee60 Quote  Post ReplyReply Direct Link To This Post Posted: 17 Sep 2021 at 16:32
Answered my own question.  Went to remove the steering damper and the main bolt holding it on had rusted in an seized solid. A bit of persuasion later and it sheered off part way up into the fairing bracket it's bolted into.  The other bolt on the eye came off easily enough.  Removed damper and it's as stiff as hell.  Took the bike out for a spin and sheer bliss.  No more tram-lining and can virtually steer with the knees on tank through the bends.  Problem solved, damper now hanging in the garage.  Not needed anyway unless suspension set up provokes front end shimmy.  Suspension set up is perfect.  Can hardly feel any bumps.  It betters the ESA suspension of my old GSA.  

Dog bone is fine.  Free movement, no stiction or squeaking from rear linkages.Beer
Ducati 950S Supersport

Back to Top
snowman View Drop Down
Premium Member
Premium Member
Avatar

Joined: 27 Oct 2010
Location: Romsey area
Status: Offline
Points: 1411
Post Options Post Options   Thanks (0) Thanks(0)   Quote snowman Quote  Post ReplyReply Direct Link To This Post Posted: 17 Sep 2021 at 16:38
Thumbs Up
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.07
Copyright ©2001-2019 Web Wiz Ltd.

This page was generated in 0.102 seconds.