Last visit was: Sat Dec 16, 2017 4:25 pm It is currently Sat Dec 16, 2017 4:25 pm

All times are UTC+01:00




 [ 13 posts ] 
Author Message
 Post subject: R/wheel not true
PostPosted: Fri Nov 24, 2017 6:26 am 
Offline

Joined: Thu Nov 10, 2011 1:06 pm
Posts: 164
Current ride: xb9snsrmc18tdr250
Location: thailand
Hi guys,I have a problem I really can't find,at around 90mph front or bars really gets out of shape,so much so I'm scared to run her up to test I thought it was gonna kill me,since rebuild,I went on a1000mile in 30hrs trip as close to 90mph cruising as I dare with front end vague shit roads and V light on most of the time(too hot ,no faults) I can keep up with a group of Harleys,so embarrassing,I've fitted tapered head bearings front wheel bearings,fork seals genuine oil set to my weight,I didn't find any problems with old bearings as they where put in with new tyres !!swing arm bearings feel fine as do rear wheel bearing but I change them anyway ,not swingman,I took the wheel for balancing for fun and you can see the wheels not true,bike has never been on the floor so I'm miffed how did it happen,and the stupid question is,would this cause my front end woes,also stripped and rebuilt rear shock filled with mogul gassed with nitrogen at 150psi,now a confession as those in the know might have the answer,IF I have my son on the back 30kg. No problems ,if someone can advise I need straight line top speed stability on really shit roads better suited to a bmw gs1200 ,there are no curves so I don't need the handling round curves,many thanks ,ps I used a map from buelltooth and its really good


Top
   
 
 Post subject: Re: R/wheel not true
PostPosted: Fri Nov 24, 2017 9:36 am 
Offline

Joined: Sat Nov 15, 2014 9:36 pm
Posts: 93
Current ride: gpz900r
Location: Uk
Hi wheels not true- or tyres badly fitted or warped due to poor storage or manufacture,
I would check rims as well as tyres, bulge in tyre,
tyre pressures ?


Top
   
 
 Post subject: Re: R/wheel not true
PostPosted: Fri Nov 24, 2017 9:48 am 
Offline

Joined: Wed May 06, 2009 5:10 pm
Posts: 1558
Current ride: 99 cyclone m2
Location: Liverpool
Head bearings too tight :?:

_________________
Buells are for life....


Top
   
 
 Post subject: Re: R/wheel not true
PostPosted: Fri Nov 24, 2017 11:50 am 
Offline

Joined: Thu Nov 10, 2011 1:06 pm
Posts: 164
Current ride: xb9snsrmc18tdr250
Location: thailand
Yeah ! Thanks for replies there's some really bad spelling in my post sorry,here's the solution ,,took the wheel to a wheel guy to get it trued up,(fucked up my new paint ,thanks) as I was checking the wheel I noticed the tyre direction was wrong this is after you lay the wheel on the tyre in the correct position for the monkey to fit it,he also asks what direction ? I really didn't feel the need to doubt he'd do it wrong,(pirelli dealer) as a result begrudgingly fitted a steering damper for safety on my trip,came home pulled everything to bits change everything for laughs and because I've got so much spare money to waste NOT plus I need to repaint the wheel it now balanced up with 10 gms instead of the 60 , I suppose the moral of the story is check the monkey


Top
   
 
 Post subject: Re: R/wheel not true
PostPosted: Sat Nov 25, 2017 11:26 pm 
Offline
Moderator
User avatar

Joined: Wed Apr 15, 2009 5:25 pm
Posts: 11480
Location: Oswestry
I'd be surprised if a tyre on the wrong way around would cause a weave. A lot of racers on a tight budget reverse their tyres to get a bit more life, especially if they ride a circuit that wears the tyre more one side than the other. I once emailed Avon to ask if a reversed tyre would do any harm ( in the dry) because the tyre I fitted to my T140 looked shite when fitted the correct way around. Like Gus said, I'd be looking at head race bearings being too tight.

_________________
If your dreams don't scare you, they are not big enough.


Top
   
 
 Post subject: Re: R/wheel not true
PostPosted: Sun Nov 26, 2017 3:17 pm 
Offline

Joined: Thu Nov 10, 2011 1:06 pm
Posts: 164
Current ride: xb9snsrmc18tdr250
Location: thailand
Thanks Adam,I'd never experienced this before it's like a heavy strong weave,I thought this has to be the reason so I'm just getting it back together to test it ,I'm using tapered roller bearings in the head,so you can't torque it as they are to tight and it all swings nice and smooth nothing untoward ,I trust myself to set them up but any extra advice is welcomed maybe I'm missing something,I couldn't get my torque wrench to work anti clockwise but again common sense is applied if you go to tight it will grab,nip and lock is what I do,if you know different ?? Please tell ,many thanks for a reply though,we learn everyday


Top
   
 
 Post subject: Re: R/wheel not true
PostPosted: Sun Nov 26, 2017 5:33 pm 
Offline
Moderator
User avatar

Joined: Wed Apr 15, 2009 5:25 pm
Posts: 11480
Location: Oswestry
I've never used a torque wrench on head bearings (or the rather silly procedure with Spring balances that Buell specify) just an arm calibrated light 'nip' especially for taper rollers. A good tugging on the fork bottoms tells you when there's no play and make sure the forks flop to each side without cables etc. I'm not suggesting my method is correct, but it works for me lOl

_________________
If your dreams don't scare you, they are not big enough.


Top
   
 
 Post subject: Re: R/wheel not true
PostPosted: Sun Nov 26, 2017 6:22 pm 
Offline

Joined: Wed May 06, 2009 5:10 pm
Posts: 1558
Current ride: 99 cyclone m2
Location: Liverpool
:yt: :yup: me too

_________________
Buells are for life....


Top
   
 
 Post subject: Re: R/wheel not true
PostPosted: Sun Nov 26, 2017 6:46 pm 
Offline

Joined: Thu May 07, 2009 9:27 pm
Posts: 1082
Location: Glossop in't th'hills
Are you setting the head bearings with the wheel and forks in ? They will act as a big pendulum masking over tightness try adjusting them with just the yokes on till the play goes but they're still smooth. The reverse of this usually masks knackered standard xb head bearings. Just my two penneth worth.


Top
   
 
 Post subject: Re: R/wheel not true
PostPosted: Mon Nov 27, 2017 10:15 am 
Offline

Joined: Thu Nov 10, 2011 1:06 pm
Posts: 164
Current ride: xb9snsrmc18tdr250
Location: thailand
No,I always like extra work I can give stuff a clean ,those forks come with me at shower time and the wheels I set up yokes only,and yes Adam I have the same elbow as you and its always served me well. !!! Thanks for your pennies though


Top
   
 
 Post subject: Re: R/wheel not true
PostPosted: Fri Dec 08, 2017 2:29 pm 
Offline

Joined: Thu Nov 10, 2011 1:06 pm
Posts: 164
Current ride: xb9snsrmc18tdr250
Location: thailand
Ok guys problem solved the bottom bearing fitted on without force so it wasn't tight on the stem,I used bearing seal loctite bolted it up overnight to cure now it's strong,I also in my wisdom(stupidity) I put a 1.5mm bush under the base bearing,I don't know ! why but it caused the base bearing to rock on the ramp on the shaft,it was all my own doing ,everything is good now ,I was the monkey,thanks guys,I actually met a guy from Australia who's very well connected to moto gp ,I took the yikes and bearings to him he sussed it immediately ,I think he's a genius


Top
   
 
 Post subject: Re: R/wheel not true
PostPosted: Fri Dec 08, 2017 2:48 pm 
Offline

Joined: Wed May 06, 2009 5:10 pm
Posts: 1558
Current ride: 99 cyclone m2
Location: Liverpool
:?

_________________
Buells are for life....


Top
   
 
 Post subject: Re: R/wheel not true
PostPosted: Fri Dec 08, 2017 2:54 pm 
Offline
User avatar

Joined: Thu May 07, 2009 12:06 am
Posts: 1614
Current ride: S1W,S2T,1125CR,XB9R
Location: North Bucks
ribi wrote:
Ok guys problem solved the bottom bearing fitted on without force so it wasn't tight on the stem,I used bearing seal loctite bolted it up overnight to cure now it's strong,I also in my wisdom(stupidity) I put a 1.5mm bush under the base bearing,I don't know ! why but it caused the base bearing to rock on the ramp on the shaft,it was all my own doing ,everything is good now ,I was the monkey,thanks guys,I actually met a guy from Australia who's very well connected to moto gp ,I took the yikes and bearings to him he sussed it immediately ,I think he's a genius

Roll 'em tight and keep 'em hot, Ribi :mrgreen:

Steve

_________________
Back on the road again!


Top
   
 
 [ 13 posts ] 

All times are UTC+01:00


Who is online

Users browsing this forum: CommonCrawl [Bot] and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Limited