Author Topic: Forks  (Read 1409 times)

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Offline James Carter

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Forks
« on: March 23, 2014, 20:03:51 PM »
Got an mot soon. Have bought a new stainless exhaust sys and had a new back tyre on sat. Had to strip and mess with my front os caliper for the 3rd or 4th time as it keeps sticking even with new seals and super smooth pistons. Think it may have been the pads catching on the pins which are now greased...anyway forks seem to be bottoming out. I've never checked the fluid but they don't appear to leak. What's the best way to check them. I do have a second set of forks and a new set of seals but I think the ones on the bike are ok. If they are able to bottom out does that indicate low fluid?


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Offline robvangulik

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Re: Forks
« Reply #1 on: March 23, 2014, 22:27:21 PM »
Did you check if the anti-dive piston on your left forkleg works as it should?
You should be able to simply push it in by hand.
When that is stuck the forks tend to bottom while braking hard....

Offline James Carter

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Forks
« Reply #2 on: March 24, 2014, 22:48:17 PM »
I've never heard of that piston ! I'll have to do a bit if research on that to see what it is!


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Offline robvangulik

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Re: Forks
« Reply #3 on: March 24, 2014, 23:57:19 PM »
On your left lower forkleg, the brake caliper is mounted "flexible" on the underside and with a hinge on the top. The lower mounting is the piston for the anti-dive, when the brake is activated while riding it will push the piston into the forkleg and thereby obstruct the flow of damping oil, preventing the fork diving too much.
But as you said already, there must be enough oil present to damp at all.The fork oil should be changed in regular intervals anyway, and it's easy to do, and only costs about 1 litre of fork oil.....

Offline James Carter

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« Reply #4 on: March 25, 2014, 06:28:55 AM »
I wondered what that was, I'll check it out - cheers!


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Offline David McDonough

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Re: Forks
« Reply #5 on: March 25, 2014, 10:33:02 AM »
As an aside what exhaust system have you fit and did you need to rejet the carbs?

Offline robvangulik

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Re: Forks
« Reply #6 on: March 25, 2014, 21:51:25 PM »
I've got the original cans wit a homebrew set of stainless downpipes and collector, as long as you keep the cans no jet fiddling needed.
BTW Fork oil capacity    Left : 485 CC
Right : 495 CC

Offline James Carter

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« Reply #7 on: March 26, 2014, 07:57:56 AM »
The stainless cans came yesterday - I'll post a pic - they're bloody gorgeous! I'm not planning on re-jetting as it runs fine with the aftermarket 1000cc ones that were on there when I bought it. I'm assuming it might have been done when that was fitted if it was necessary? The down pipes and collector are already stainless.


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Offline James Carter

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« Reply #8 on: March 26, 2014, 07:59:41 AM »
More pics when I fit it - can't wait


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Offline Connor
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Re: Forks
« Reply #9 on: March 28, 2014, 08:15:33 AM »
Very nice pipes!  They're similar to the Staintunes I have on my VTR.  The problem is keeping all the muck of them and shining!  :)