Hello & Welcome to our community. Is this your first visit? Register

Thanks Thanks:  0
Likes Likes:  1
Dislikes Dislikes:  0
Page 1 of 2 12 LastLast
Results 1 to 10 of 12

Thread: Front end issue

  1. #1
    moto_fz6n (OP)
    Junior Member
    Join Date
    Jul 2016
    Location
    Europe
    Posts
    19
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Front end issue

    Hello guys,

    A couple of years ago I've bought a 2008 FZ6 N with around 27.000 km / 16872 miles and now I've got around 33 k km. Pretty soon after I bought the bike I stared hearing strange sounds coming from the front end. I've asked a couple of guys from a local garage to take a look at it, they tested the bike on the road and seamed fine. In time I've got "used" with the strange sound and ignored it. It;s not something constant, it only manifests i hard braking. Something like a knocking sound is coming from the left side of the front end. ( I'm not really sure if the sound is made when the suspension is compressed or released. ) I tried to reproduce the sound at a stand still by pressing like a mad man on the handle bars ) but everything worked fine and no knocking sound.

    And guess what, ? something finally gave up (......

    Is this what I think it is ?
    Attached Thumbnails Attached Thumbnails Front end issue-20180513_132754-jpg  
    Last edited by moto_fz6n; 05-13-2018 at 12:23 PM.

  2. #2
    2007 FZ6 TownsendsFJR1300's Avatar
    Join Date
    Feb 2009
    Location
    Cape Coral, Florida, USA
    Posts
    10,791
    Mentioned
    46 Post(s)
    Tagged
    1 Thread(s)

    Re: Front end issue

    Well those forks are off something else, NOT an FZ6..

    Besides the seal leaking, bushings inside the fork could very well be worn and need replacement.

    I would definitely be checking the steering head bearings that their not loose, worn out, etc.

    ANY CLUNKING in the front end is not good..
    Scott
    2007 Yamaha FZ6- BD43 headlight mod, PIAA bulbs, Stebal air horn, Scorpion SS pipes-(no DB killers), Speedohealer, HEL SS brake lines, Fenda Extenda, K&P SS re-usable oil filter, custom mounted BMW style electrical outlet(L.S.), Techmount GPS mount with handlebar bar risers/set backs, additional helmet lock, custom mod'ed seat(Spencers), Hyper light-rear running/brake light, custom radiator/fan protector, Techspec tank pads, Grip Puppies, Yamaha rear rack with custom aluminum flat rack.

  3. #3
    Never stop exploring darius's Avatar
    Join Date
    May 2012
    Location
    Above California
    Posts
    1,155
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)

    Re: Front end issue

    As Scott said, it looks you have alien components. More pics including wider shots would be helpful.

  4. #4
    moto_fz6n (OP)
    Junior Member
    Join Date
    Jul 2016
    Location
    Europe
    Posts
    19
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Re: Front end issue

    Quote Originally Posted by TownsendsFJR1300 View Post
    Well those forks are off something else, NOT an FZ6..

    Besides the seal leaking, bushings inside the fork could very well be worn and need replacement.

    I would definitely be checking the steering head bearings that their not loose, worn out, etc.

    ANY CLUNKING in the front end is not good..
    Are you sure about that ? They look the same to me - generic picture. I've also attached a few older pictures from my phone. I will try to clean up the oil, and come back with some fresh ones.

    Regarding the steering bearings. A mechanic tested them by lifting the front end from the ground and slightly moving the handle bars left right...he said there was no play in the bearings.
    Are there other things I need to check, to makes sure the bearings are ok ?

    Also, are there any connecting components in the lower part of the front end (except the brake calipers ..etc ) or is just a big chunk of aluminium ?

    Thank you.
    Attached Thumbnails Attached Thumbnails Front end issue-20160821_175537-jpg   Front end issue-20160828_135847-jpg   Front end issue-img-20160517-wa0008-jpg   Front end issue-img-20160517-wa0010-jpg   Front end issue-img-20160517-wa0009-jpg  

    Last edited by moto_fz6n; 05-14-2018 at 12:52 AM.

  5. #5
    Never stop exploring darius's Avatar
    Join Date
    May 2012
    Location
    Above California
    Posts
    1,155
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)

    Re: Front end issue

    OK the forks look stock. The leak in the first pic is likely to be the seal and they're more likely to blow after drying out without the lubrication that the fork oil offers.

    Can you trace back the oil back to the fork dust cap? I don't see how it could be anything else really. Perhaps you have had a small leak for a long time and the fork leg started to run dry and causing noise before blowing completely.

    A fork seal set is ~$30 from Yamaha. This would be a good time swap fork springs if they're too light for your weight.

  6. #6
    Super Member Front end issue zixaq's Avatar
    Join Date
    Feb 2016
    Location
    San Francisco
    Posts
    380
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)

    Re: Front end issue

    You almost certainly have a fork seal that needs replacement, so service the forks first and get it back together. If the noise persists after that go hunting for more complex problems.

    Fork service is relatively simple & cheap, and more than likely you're sporting seals and fork oil from 10 years ago (gross).

  7. #7
    moto_fz6n (OP)
    Junior Member
    Join Date
    Jul 2016
    Location
    Europe
    Posts
    19
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Re: Front end issue

    Quote Originally Posted by darius View Post
    OK the forks look stock. The leak in the first pic is likely to be the seal and they're more likely to blow after drying out without the lubrication that the fork oil offers.

    Can you trace back the oil back to the fork dust cap? I don't see how it could be anything else really. Perhaps you have had a small leak for a long time and the fork leg started to run dry and causing noise before blowing completely.

    A fork seal set is ~$30 from Yamaha. This would be a good time swap fork springs if they're too light for your weight.
    I wasn't able to find any trace of oil coming out from the dust caps :O, they look pretty good. I've cleaned the area and then pressed on the handle bars a couple of times and also pulled on the front brake leaver like hell but no oil came out.. I thought I will find some cracks in the aluminium in that area but everything looks ok. ( what do you think ? Btw the "oil drop" from the last picture is from the chain cleaner I've used to clean the forks...)

    I've also looked for broken brake hoses but if nothing came out after this experiment I don't think there is an issue here ( btw the brake fluid is at the top level...).


    Quote Originally Posted by zixaq View Post
    You almost certainly have a fork seal that needs replacement, so service the forks first and get it back together. If the noise persists after that go hunting for more complex problems.
    Fork service is relatively simple & cheap, and more than likely you're sporting seals and fork oil from 10 years ago (gross).
    You could be right, I don't think the previous owner(s) did any service on the forks. After the service, I will return with feedback regarding that noise....


    Thanks
    Attached Thumbnails Attached Thumbnails Front end issue-20180514_183243-jpg   Front end issue-20180514_183232-jpg   Front end issue-20180514_183222-jpg  
    Last edited by moto_fz6n; 05-14-2018 at 10:25 AM.

  8. #8
    Never stop exploring darius's Avatar
    Join Date
    May 2012
    Location
    Above California
    Posts
    1,155
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)

    Re: Front end issue

    You must be able to trace the fluid. It's either fork oil or brake fluid if it indeed came from your bike's front end. If you have a blown fork seal, there would be a thin film of oil from pumping the forks. It would also be prone to leaking tipped on the side stand for the left leg.

    If it's brake fluid, the fluid color would match that of your fluid in the master cylinder. Clear if new or yellowed with age. You can zip tie the brake lever to put the system under pressure as you check for leaks.

  9. #9
    2007 FZ6 TownsendsFJR1300's Avatar
    Join Date
    Feb 2009
    Location
    Cape Coral, Florida, USA
    Posts
    10,791
    Mentioned
    46 Post(s)
    Tagged
    1 Thread(s)

    Re: Front end issue

    Yep, their stock forks. It almost looks like that section has a crack in it. I never heard of that happening on the FZ and have to doubt it.

    It does look like old fork oil. If it was brake fluid, he would have ran out a long time ago and lost his brakes.

    I suspect, the PO knew (and acknowledged) the fork seal leak. I suspect it's all leaked out now, thus no more to show. You don't know how much it lost prior to you buying it, so that's a crap shoot.

    Oil has a very different feel than brake fluid but both taste like chicken...

    Yank them forks and do a close inspection for metal particles, anything amiss...
    Scott
    2007 Yamaha FZ6- BD43 headlight mod, PIAA bulbs, Stebal air horn, Scorpion SS pipes-(no DB killers), Speedohealer, HEL SS brake lines, Fenda Extenda, K&P SS re-usable oil filter, custom mounted BMW style electrical outlet(L.S.), Techmount GPS mount with handlebar bar risers/set backs, additional helmet lock, custom mod'ed seat(Spencers), Hyper light-rear running/brake light, custom radiator/fan protector, Techspec tank pads, Grip Puppies, Yamaha rear rack with custom aluminum flat rack.

  10. #10
    moto_fz6n (OP)
    Junior Member
    Join Date
    Jul 2016
    Location
    Europe
    Posts
    19
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Re: Front end issue

    Thanks guys for all the suggestions, I will remove the forks for service and come back with feedback.

  11. Likes TownsendsFJR1300 liked this post
 

 
Page 1 of 2 12 LastLast

Similar Threads

  1. Bar End Issue
    By Jim V in forum FZ6 General Discussion
    Replies: 6
    Last Post: 10-29-2013, 09:22 AM
  2. 1986 Starting issue and revving issue
    By 1246 in forum Garage / Mechanical Help
    Replies: 2
    Last Post: 07-14-2012, 12:38 PM
  3. oil issue
    By benny66 in forum Garage / Mechanical Help
    Replies: 9
    Last Post: 07-17-2011, 03:17 AM
  4. having an issue....
    By rdabernig41 in forum FZ6 Mods
    Replies: 11
    Last Post: 04-16-2010, 11:58 PM
  5. 06 Fork Spring Issue
    By vikeme in forum Garage / Mechanical Help
    Replies: 3
    Last Post: 03-09-2010, 12:07 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -7. The time now is 04:02 PM.
4.2.5
Image resizer by SevenSkins
Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like v3.6.3 (Lite) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright 2007 , All content is property of 600Riders.Com All Rights Reserved. The opinions and posts on this site do not neccesarily reflect those of the site owners or operators.
Yamaha FZ6 and Yamaha rights are property of Yamaha Motor Company. 600Riders.com is not associated with Yamaha in any way. We are an enthusiast site dedicated to the Yamaha FZ6 motorcycles. Our goal is to offer a place for Yamaha FZ6 owners to discuss rides, events, mods, maintenance, purchasing, etc
vBulletin Skin By: PurevB.com