Lansdowne Fork Damper Kit (2009)

79x100 said:

Perhaps a silly question but if one leg has all the compression damping and the other rebound, isn't the effect under either loading similar to running with oil in one leg only ?


Is a fork brace recommended ?

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I've certainly heard of this type of damper arrangement being used before on other forks, although I can't remember exactly which ones.

79x100 said:

Isn't everything likely to try and twist ?

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I feel that the results must speak for themselves.

If any adverse reaction is being caused by the un-equal damping arrangement, then I certainly haven't noticed it?

79x100 said:

Perhaps a silly question but if one leg has all the compression damping and the other rebound, isn't the effect under either loading similar to running with oil in one leg only ? Isn't everything likely to try and twist ?

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Many modern bikes use this arrangement, where adjustment to compression is done on one fork, and rebound on the other. My Speed Triple is set up this way, which is a budget way of making adjustable forks. Works great.

Triumph's Street Triple has the same setup, but the Street Triple R has fully adjustable forks and some other bits (and about a $1500 higher price tag)

Hi .In thinking the arrangement "attempts to twist" if thats the correct term, The wheel spindle?..Frame? ..not sure what's implied here...Twist means an axal distortion. ie "we twist a rope". or "Bends"? the dampers bend something?..and if they are...what? Lost me there sorry/// lots of modern bikes use rebound in one side,compression the other..not read any reports regarding twisting...BUT IF YOU THINK ONE LEG AS TO HANDLE THE UP FORCE,AND THE OTHER THE DOWN FORCE,,,YOU ARE CORRECT. BUT,,and here's the issue,as the forks are bolted together by the wheel and spindle,and allso supported by the wheel / bearings...and would require thousands of pounds to move these in differant directions. Infact to do this the spindle will have to bend.The much.much smaller rebound .compression force's acting upon said wheel spindle [via the dampers]cannot and will not ..bend a 15mm hi tensile spindle.. when set up the rebound /compressional force"s are approx 20-30 kg.. Wheel spindle steel approx 20 tons tensile! No brace required...just a good fitting hole in your sliders CRANKSHAFTS PUT UP WITH THOSE TORSIONAL FORCE'S BECAUSE THEY ARE STRONG ENOUGH TO RESIST THE TWIST. There is hundreds and hundreds of pounds trying to snap off your brake mountings , and well worth a mention....a single sided disc puts tremendus strain on twisting the forks .or correctly trying to bend the stanchion,, infact the braking action lock's the forks by forcing the topbush hard against the stanchion,,allso the slider is now attempting to spin forward ...worried? You can rest assured....Duncans not noticed anything twisting. or BENDING.....Best regards John

Hi guy's,
I just ordered the kit from John via the net. Gota say, what a nice guy John seems to be. I cant wait till the kit arrives.
Thanks JOHN
Darren
Bellbird NSW
Australia.

Hi To all. As any one used p.t.f.e fork bushe's ? If so do they resist the effect's of oil,causing them to swell? :?:

LOL. :lol:
JUG

john robert bould said:

NO I AM NOT A NICE GUY!!! INFACT I AM THE MOST HORRID,CANTANKEROUS OLD GIT YOU WILL EVER MEET!!! AND I HAVE BEEN WORKING AWAY ,LATE INTO THE NIGHT,,JUST TO MAKE AND SELL YOU THE MOST NASTY ,ILL CONTRIVED DAMPERS ...JUST TO RUIN YOUR LOVELY COMMANDO'S HANDLING!! WHAT FOOL WOULD CONSIDER REPLACING THEIR ORIGIAL WRIST JARING UNITS . WITH SOMETHING THAT SPOILS THE CRASHING.KNOCKING TOPPING EFFECTS THE "OLD " ONES GIVE?,,,I WILL NOT REFUND ANYONE WHO IS FINDING THEIR NEW DAMPED FORKS..COMPLIENT,SMOOTH AND SWEET...IT'S YOUR OWN BLEEDIN FAULT!!! SO IT'S JUST HARD LUCK !

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:lol: I bet you go by W.C. Fields "Anyone who hates children and dogs can't be ALL bad" or thruth in advertising pushed to it's limits :lol:


Jean

DELIVERY...DISPATCH IS NOW 6-8 WORKING DAYS AFTER REMITTANCE. REGARDS JOHN

Hello John

re ptfe and oil
ptfe has been used for years on high pressure hydraulic systems with mineral or synthetic oils eg shell tellus without problems
usually as piston and rod seals where a ptfe ring provides the bearing surface of the seal with a nitrile rubber backing ring which "energises" the seal ie keeps it in contact with the wall of a cylinder or surface of a piston rod.
Also, bearing surfaces of pistons etc in hydraulic cylinders are porous bronze loaded with ptfe eg "glacier"bearings
there's lots of info on the internet google hydraulic seals
have I tried it? not in motorbikes but 40 years in railway testing labs with hi-pressure servohydraulic systems.
By the way, be careful maching ptfe, it forms poisonous fumes if swarf is ignited, same as WW1 poison gas!
Any help?
Jim (1950 ES2)

My new damper kit arrived from the UK to day and they are a work of art. Thanks John, very impressed.
JUG

I want a kit, can I pay with Paypal?

Unclviny

Unclviny said:

I want a kit, can I pay with Paypal?

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Yes you can, I suggest you contact John directly using this site's PM or e-mail service?

HELLO TO ALL THE MEMBERS WHO PURCHASED THE DAMPER KITS. DUE TO THE UNEXPECTED DEMAND,AND VERY COLD WEATHER...MINUS 12 IN THE STAFFORDSHIRE MOORLANDS..I AM BEHIND WITH DISPATCHING THE DAMPER KITS...BUT I AM AIMING TO POST ALL THE SETS OFF SHORTLY. ALL THE VERY BEST JOHN.LANSDOWNE ENG

My damper kit left today, yay me! (and thanks John)

Unclviny

HAPPY NEW YEAR TO ALL WHO BOUGHT THE KITS...ALL ORDERS UP TO DATE AND POSTED 14 SETS TO THE U,S,A AND SIX TO THE UK...NOT FORGETTING DAVE IN DUBLIN ANY NEW ENQUIRE'S 7 WORKING DAYS DISPATCH TURN AROUND.

Just receive my kit today: really well made! I cant wait till my bike is finished: in between the CNW trees, progressive springs and this, the handling should awsome!
Philippe

Excellent! Postage is so slow to the U.S

Gday John,thinking you should have "Lansdowne" engraved on them dampners top nuts or perhaps maybe a small sticky back aluminum symbol of sorts to advertise the bikes equiped?! I know this might add to the cost but maybe bugger all. Foxy

Hello Foxy, I have been busy developing the LANSDOWNE Fork reconditioning KIT .and don't mean the dampers :wink: My slider refurb kit restores the slider /bush fit, and the Full Adjustable Tri T140 Dampers. Commando owners who require a Kit that will refurbish their slider's . Back to BETTER THAN NEW! .........................YES .....BETTER THAN NEW! and DIY and in less than 30 minutes :!: Impossssible? Not now!!! OK I know what every one will be thinking :roll: How?....... watch this space. Sorry no stickers ...well not yet. Regards JB

john robert bould said:

HAPPY NEW YEAR TO ALL WHO BOUGHT THE KITS...ALL ORDERS UP TO DATE AND POSTED 14 SETS TO THE U,S,A AND SIX TO THE UK...NOT FORGETTING DAVE IN DUBLIN ANY NEW ENQUIRE'S 7 WORKING DAYS DISPATCH TURN AROUND.

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and BARRY SALMON....VERY SORRY ....I POSTED THEM FIRST CLASS ......