FZR 3LN forks

A 3MA TZR250 will probably bolt on. A friend who i ride with(also posts on here sometimes) researched it a bit. Would be nice if it was doable, USD forks would rock my socks.

I'm not sure how this would alter the geometry of the bike though.

 

3XV poopra... <!-- s --><img src="{SMILIES_PATH}/icon_biggrin.gif" alt="" title="Very Happy" /><!-- s -->

 

I was in the ball park <!-- s --><img src="{SMILIES_PATH}/icon_smile.gif" alt="" title="Smile" /><!-- s -->
Maybe one day i'll get my facts correct <!-- s:alcoholic: --><img src="{SMILIES_PATH}/icon_all_coholic.gif" alt=":alcoholic:" title="Alcoholic" /><!-- s:alcoholic: -->

 

what is a USD fork ? sorry guys im new here

 

USD = Up-Side Down Also called Inverted Forks.

 

are they better or is it just for style

 

More ridgid, Generally speaking, have more adjustments too. But not always. As a rule they are found on sportbikes, but from time to time you'll see a custom with inverted forks.

 

Come on Tim, you know the physics of why USD's are better than conventionals don't you!?

The USD's work in a slightly different way that allows the rate of travel to act in a more progressive (read exponential) manner. This means that you get lots of play in the middle and then it will stiffen up progressively but still effectively towards the ends of the play. USD's also have more mass lower on the fork leg which is a good thing for handling!
Conventional forks react in a much more unpleasant way when pushed to their limits, often not really providing the suspension feedback your after when riding hard.

I'll dig up the proper explanation when i've got the time - it makes for an interesting read. The important thing is that they react in a slightly different way, and when pushed to extreme's USD's react more pleasantly than conventionals.

 

Hi, i recently crashed my mint fzr250 3ln6 and am finding it impossible to find forks. Anyone know where i can find some or what other forks will work, Thanks !

 

You're best of contacting your local Yamaha parts dealer which will probably be a little expensive.
Otherwise you'll have to source a set from overseas.

 

Thanks, i priced them off yamaha €700, just a little expensive ! fairly hard to find on the web. Better keep lookin !!!!!!

 

would it be a big job to change to USD id think it would involve changing the triple clam brakes and spacers on the wheele is there anything i missed and what would it all cost

 

The 3 biggest things to look for would be fork length, diameter, and steering stem length/diameter.

If the forks are too long or too short = won't work
If the diameter is different than the FZR = New clamps will be needed*
Steering Stem* = this has to be perfect. You may be able to use other triples as long as the stem from the FZR can be pressed into the lower triple of whatever clamps you are using.

There will be other things that come into play such as wheel compatibility (use the matching wheel from the forks silly), speedo drive, ignition, steering locks, bars, and so forth.

Cost? Anywhere from $5-$5000.

 

I have a similar problem to peterfitz, my forks are so pitted that they tear the seals. I am going to try swapping out FZR 600 forks, rotors, and calipers. It is far easier and cheaper than buying new fork legs. Also, my calipers were seized.

 

happy days for me, i found an old fzr not running right and its going nice and cheap. I think this would be your best option although it took me 5 weeks of looking everyday but it paid off in the end !!!!

 

the 600 forks arrived....and wont work. the tubes are about 3 inches too long <!-- s:cry: --><img src="{SMILIES_PATH}/icon_cry.gif" alt=":cry:" title="Crying or Very sad" /><!-- s:cry: -->

 

3 in is a lot, Couldn't you slide them up through the triples? Again, 3 inches is a bunch of fork sticking up.

We have a similar problem trying to adapt R1 forks to the FZR1000/YZF750's. They are about 2 1/2 inches too short.

 

you could try the top yoke and bars of a 2KR from memory they stick out about 2" and the bars are clamped on that.

just a thought