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clunk clunk

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simonplatt
Two Stroke Sniffer



Joined: 17 Jan 2013
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PostPosted: 14:52 - 12 Jul 2014    Post subject: clunk clunk Reply with quote
am getting a clunk at the front when braking hard to a stop and fully depressing forks. on the way down and on the way up at the bottom of the travel.
i think that its the valves in the legs, but the oil was done a while ago, there is no seeps or leakage.

not wanting to remove and empty the legs again, is there a way to 'dip' them to check oil level?

and of course know if they are low or not.
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CaNsA
Super Spammer



Joined: 02 Jan 2008
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PostPosted: 14:53 - 12 Jul 2014    Post subject: Reply with quote
Check the headstock is tight enough, along with the bolt on top of the top yoke.
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killerbanjo
Renault 5 Driver



Joined: 17 Jun 2013
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PostPosted: 14:58 - 12 Jul 2014    Post subject: Reply with quote
Sounds like your steering stem is loose. Try taking off the top yolk and tightening the stem. Don't over tighten it though or you might damage the roller bearings Thumbs Up
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CaNsA
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PostPosted: 15:09 - 12 Jul 2014    Post subject: Reply with quote
killerbanjo wrote:
Sounds like your steering stem is loose. Try taking off the top yolk and tightening the stem.


No need to remove the yoke to tighten the stem.

Last edited by CaNsA on 15:48 - 12 Jul 2014; edited 1 time in total
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lihp
World Chat Champion



Joined: 22 Sep 2010
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PostPosted: 15:18 - 12 Jul 2014    Post subject: Reply with quote
Check head bearings
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Nobby the Bastard
Harley Gaydar



Joined: 16 Aug 2013
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PostPosted: 16:49 - 12 Jul 2014    Post subject: Reply with quote
Definately sounds like there is movement in the headstock and if you are lucky , it just needs a tweak to the nut on the top. You definately don't need to remove the yoke to do it though.

On mine, the torque setting quoted is stupidly high so using the general approach of 'nipping it up till it feels right' would probably mean it's not tight enough.
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CaNsA
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PostPosted: 16:53 - 12 Jul 2014    Post subject: Reply with quote
So maybe he need to check and tighten the headstock?
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Nobby the Bastard
Harley Gaydar



Joined: 16 Aug 2013
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PostPosted: 17:01 - 12 Jul 2014    Post subject: Reply with quote
Yes. But he doesn't need to remove the yoke to check and tighten it.
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trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
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CaNsA
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PostPosted: 17:13 - 12 Jul 2014    Post subject: Reply with quote
Nobby the chihuahua wrote:
Yes. But he doesn't need to remove the yoke to check and tighten it.


To tighten what?

The headstock?
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Nobby the Bastard
Harley Gaydar



Joined: 16 Aug 2013
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PostPosted: 18:01 - 12 Jul 2014    Post subject: Reply with quote
Definately the headstock. Not the top yoke. if you try and tighten the top yoke you'll just rip out threads.
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trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
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lihp
World Chat Champion



Joined: 22 Sep 2010
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PostPosted: 18:05 - 12 Jul 2014    Post subject: Reply with quote
So you can tighten a steering stem without removing the top yoke?
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Ste
Not Work Safe



Joined: 01 Sep 2002
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PostPosted: 18:07 - 12 Jul 2014    Post subject: Reply with quote
The headstock is the piece of metal that goes from the bottom yoke and through the frame, it's not exactly adjustable! Laughing

I assume you're meaning the bearings, which can be tightened without removing either yoke.
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lihp
World Chat Champion



Joined: 22 Sep 2010
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PostPosted: 18:11 - 12 Jul 2014    Post subject: Reply with quote
Ste wrote:

I assume you're meaning the bearings, which can be tightened without removing either yoke.


Can I remove the lower yoke to tighten?
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YBR Ric
Spanner Monkey



Joined: 16 Jan 2012
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PostPosted: 18:28 - 12 Jul 2014    Post subject: Reply with quote
DON'T FORGET to slacken the top yoke bolts before adjusting the steering head bearings or something will get damaged Shocked
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gavcarter
Could Be A Chat Bot



Joined: 28 Mar 2009
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PostPosted: 22:13 - 12 Jul 2014    Post subject: Reply with quote
YBR Ric wrote:
DON'T FORGET to slacken the top yoke bolts before adjusting the steering head bearings or something will get damaged Shocked


Not until you try and tighten the top yoke back down Wink


If you cant pick your way through the replies, then here is what to do.



first gain access to the headstock area ( remove fairings, clocks etc what ever will be in the way )

get the front end in the air, when stuck i have used the centre stand, and ratchet straps to a drain cover to pull back of bike down over.

Next slowly tighten the upper bearing retainer down. This will be similar to this one
https://www.hvccycle.com/images/HVC20092.JPG

Dont over tighten just nip it up, keep checking front end can turn nicely as you tighten it.

General rule is to get it as tight as possible without affecting the steering, so keep going until the steering feels just slightly stiff than back it off very slightly.

It may have a second nut similar to the one above to lock into place. Lock them together if it does.

If it does not, loosen top yoke from the forks, and it should budge, wiggle, tap with hammer handle, down the stem and fork legs to sit back flush on top of the bearing retainers.

Tighten yoke nut down as there will now be a slight gap under this and the top yoke.

Re-tighten fork clamps on top yoke.

Measure how much fork leg is protruding the top of yoke, just to be sure you haven't knocked one leg further down the bottom yoke ( not likely but has been known )

Double check steering, and check stem for movement, push front wheel back and forth, the "knock" should have gone now, also pay particular attention to the straight position.

when turning form right to left and back again the steering should no go light or stiffen up as it passes central ( straight ahead ) if it does your bearing, or the bearing races are fooked and will want replacing quite soon.

Best of luck, hope Ive explained everything in English Thumbs Up
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gavcarter
Could Be A Chat Bot



Joined: 28 Mar 2009
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PostPosted: 22:16 - 12 Jul 2014    Post subject: Reply with quote
PhilDawson8270 wrote:
So you can tighten a steering stem without removing the top yoke?


IF you can get access yes, a large c-spanner type tool is usually require with top toke in place - they will usually squeeze in under the top yoke from the back side of the forks

https://faq.f650.com/FAQs/Photos/SteeringPhotos/SlottedNutTighten.jpg

Most people remove the top yoke in order to use a pair of stilsons, other large spanners or a brass drift and a small hammer or what ever else they decide to turn the nut with Wink
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gavcarter
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Joined: 28 Mar 2009
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PostPosted: 22:21 - 12 Jul 2014    Post subject: Reply with quote
Nobby the chihuahua wrote:

On mine, the torque setting quoted is stupidly high so using the general approach of 'nipping it up till it feels right' would probably mean it's not tight enough.


That will be for the yoke nut though, yes? Which only tightens onto the upper bearing retainer, so it doesn't put any pressure onto the bearings, as this is done by the slotted nut below the yoke....
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simonplatt
Two Stroke Sniffer



Joined: 17 Jan 2013
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PostPosted: 11:39 - 25 Jul 2014    Post subject: Reply with quote
sorry to be so long getting back. thanks to all for assistance.
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pdg
World Chat Champion



Joined: 15 Sep 2012
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PostPosted: 17:25 - 25 Jul 2014    Post subject: Reply with quote
Ste wrote:
The headstock is the piece of metal that goes from the bottom yoke and through the frame, it's not exactly adjustable! Laughing


No it's not... That's the steerer tube - the headstock is the bit of the frame the steerer goes through.

Really Ste, you should know better at your age Wink
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