Fork tube compatibility question

[mik_str]

Quick question: Does anyone know if there would be any compatibility isuses in fitting fork tubes from a ST1300 (aka Pan-Eurpoean) to the (96-97) CBR900RR forks I am using? Both are made by Showa and 45mm diameter. The ST tubes are 42mm longer.....

Thanks in advance

[lloydie]

you would also need the internal cartridge to go with the longer fork tube .
as the blade cartridge will be to short .
and check part numbers on the slider bushes to se if they are the same ,.

[tony.mon]

Be a little careful Micky; there has apparently been a recall on the fork lower legs on some recent USd forked Blades and so there are lots of cheap fork stanchions for sale 2nd hand.
Not sure what the recall would be for, but it doesn't sound too goo.

[lloydie]

The 96-97 had rwu forks :-)

[mik_str]

Thanks gents

FWIW, the main reason for looking at the longer tubes would be to get back some of the free length I apparently lost with the (96-97) 900RR forks. I had read that the (900RR) forks used on the Moriwaki race bikes used longer tubes (I would imagine to get them back to "stock" length).

As for the why behind all of this, I found the bike gets a touch nervous when the speeds get up there (like over 100 mph, I very seldom get there as I can't afford to lose my licence, but it happens from time to time that I do a run through the gears). I will try to drop the rear (am currently running a 4.1mm shim on the shock but will either remove it or use a thinner one) to see if that cures it. I thought longer tubes would be a way to get the length back to stock (would have to get a spacer for the spring, 42mm should do the trick as it's the exact length difference from the 900RR to ST tubes).

Incidentally, I recall reading that the linkage essentially multiplies the gain in ride height (compared to shim height) by a factor of 4. Can anyone confirm this?

cheers

[VTRDark]

Quote from Roger D

rising ratio of the linkage is effectively 2:1

http://vtr1000.org/phpBB3/viewtopic.php ... er#p239066

(:-})

[agentpineapple]

iirc the recall on blade fork lowers were on the cbr929 (2000/01), some of them develped cracks, honda replaced them under warrenty....
i'd deffo take out the shock spacer micky....

[lloydie]

I run a 4mm spacer in the rear and 92 blade front end and linear springs and find it very stable a max speed (on a private road ) . I thought the moriwaki had the forks made longer so they could have more adjustment on the hight of the bars + they had a stepped top yoke .
Maybe yeti or Rodger can confirm this .

[mik_str]

Thanks gents

[sirch345]

Incidentally, I recall reading that the linkage essentially multiplies the gain in ride height (compared to shim height) by a factor of 4. Can anyone confirm this?

cheers

AFAIK Micky that is correct, I.E. A 1mm shock pacer would raise the rear of the bike by aprox. 4mm (6mm spacer X 4 = 24mm),

Chris.