RPM valves and springs versus exup front forks

[nurse]

Found a set of exup forks for about the same cost as rpm valves and springs.  Was just wondering if anyone had bit of experience or an informed opinion as to why i should choose one above another!  Just to muddy the waters there is a 'romantic streak' in me that would be keen to keep as close to the original bike as possible, but in no way means I am biased if it means compromising what would be a better end performance!

[hein]

Hi nurse.

No offence intended but your reference to exup forks means very little in terms of what forks you refer to. A shitload of various year Yamahas used an exup valve including FZR, R1, R6 and FZ1. The year and model of the donor forks would be a indicator of suitability.

Hein.

[Pat Conlon]

I assume you mean the conventional exup forks from the late '80's, and not the '91+ usd exup ru forks.....?
You know that these are damper rod forks and not cartridge forks?
When comparing costs, you do know that you need more than just the forks...correct?

Have you read this? http://www.fjmods.btinternet.co.uk/FrontForks.htm

You do know that (according to Barry's experience) the exup fork seals are prone to leaking?
(first paragraph) http://www.fjmods.btinternet.co.uk/usdforks.htm

Finally, don't forget in your exup forks you will still need new springs (stock spring is too light at .80kg/mm) and cartridge emulators...

..... and when you are done with all of this, it will be the same cost as Randy's valves and springs...? Really?

[fj11.5]

I asked the same thing a few weeks ago, all I would be gaining with fzr forks was slight bigger discs that I would have to find , and only a little bit of handling gane, would work out much cheaper and better handling to buy rpm fork valves,  have more brakes than bike as it is , blue dots and 14 mm master with braided lines ,

[nurse]

Thanks for your time folks, apologies for sketchy info  a friend of mine was selling them on behalf of a family member and only gave me half the details. Turns out they were fzr 1000 ru exup forks.  the forks in question have since been sold so between that and the input from u nice folks the question has been answered for me!

[Alf]

Hi:
I´ve asked the details to the owner about the handling, geometry and conversion. Meanwhile, here there are some pics

[Alf]

And yes, the Exup forks seals are prone to leak and possibly you will need a stronger front springs (even with the changes in geometry and with the spring regulator It could be not neccesary)

But the BIG discs are a PLUS

[Pat Conlon]

I like mine.

By it's nature, the USD fork design is just flat out structurally superior to the conventional 41mm FJ front end.


A stiffer, lighter 17mm (hollow) axle, with superior axle clamping on the lower front legs


Yes, you have to put in heavier .95kg/mm springs for the FJ's 100 lb weight difference, along with Race Tech adjustable cartridges necessary to control those heavier springs.... but with big 320mm rotors and R-1 brakes, what's not to like?

Besides, as Mike Ramos reminds me...it gets the chicks...

Cheers Pat

[FJmonkey]

Besides, as Mike Ramos reminds me...it gets the chicks...

Cheers Pat

Errrr, the story has been told in a brilliant and heart felt fashion, the chick is the bike.... Right?

[fj1289]

Errrr, the story has been told in a brilliant and heart felt fashion, the chick is the bike.... Right?

Pat did mention "stiffer" in his post...