is the fzr 400 3en2 stem same as r6?

[EZMOTO]

just bought set of 2000 r6 forks and yolks, i got the yolks removed and measured the fzr 3en2 stem and it seems they are the same size as the r6 ones, i havent had them pressed out yet but they measure the same at the bottom, just that i heard i had to have the fzr stem welded then milled down??

[Evilchicken0]

The front end of the Thundercat will drop straight into the 3EN2 so I don't see why the R6 front end wouldn't do the same.
You don't really want the R6 forks in the 3EN yokes because then you'll have to use the 3EN wheel and I think the spindle is bigger on the R6, so you might as well drop the lot in.

[Kayla850]

just bought set of 2000 r6 forks and yolks, i got the yolks removed and measured the fzr 3en2 stem and it seems they are the same size as the r6 ones, i havent had them pressed out yet but they measure the same at the bottom, just that i heard i had to have the fzr stem welded then milled down??

I'm not sure about the R6, but the bit that presses into the stem on that year's R1 is 0.3mm larger than the bearing seat making it (the old stem) a slide fit into the R1 yoke rather than a press fit. I've just done a TRX/R1 stem swap for someone and the TRX stem needed to be TIG welded up and then turned down to size. You should just be able to use the R6 stem in the 3EN2 frame, they're the same length I think, and if the R6 lower bearing seat is the same as the 3EN2 (it is), just use FZR bearings on the R6 stem

R6 forks won't go into the 3EN2 yokes without boring them out- 3EN2 forks are 41mm, R6 rwu forks are 43mm.

Are you intending to use the 3EN2 front wheel with the R6 forks?

edit- if you want any help or advice, send me a PM- I do this for a living

[thunderace]

The front end of the Thundercat will drop straight into the 3EN2 so I don't see why the R6 front end wouldn't do the same.
You don't really want the R6 forks in the 3EN yokes because then you'll have to use the 3EN wheel and I think the spindle is bigger on the R6, so you might as well drop the lot in.

+1

The early R6 used the Thundercat front end so it should be a straight fit. You'll need the R6 wheel and calipers as well though. I don't think the original 3EN calipers will fit, the blue spots are miles better anyway.

[EZMOTO]

thanks for fast reply's

i want to use the r6 yokes as the stock fzr ones are so heavy

i've included some pics of the r6 stem against the fzr one its alot shorter and cannot be used on the fzr as top end sticks through about 10mm

[thunderace]

You should be able to fit the FZR stem into Cat/R6 yokes though, they should be the same diameter.

[EZMOTO]

yeah thats what i thought, will find out tomorrow hopefully, just weighed the 2 sets of triples

fzr 5.75LB
r6 3.00LB

so should save a good few pound on this front end swap

anyone know what fzr wheel weights in at or forks?

[Evilchicken0]

The early R6 used the Thundercat front end so it should be a straight fit. You'll need the R6 wheel and calipers as well though. I don't think the original 3EN calipers will fit, the blue spots are miles better anyway.

I thought the T'Cat forks were 41mm ? they're similar to the FZS600 Fazer and Foxeye.
The original calipers will fit cos they're 100mm bolt spacing.

The R6 uses a different wheel style to the FZR the hub is a bigger dia and therefore uses a different design of brake disc so it isn't just the weight of the wheel it's the combination, but I'd be surprised if the R6 kit is heavier.

[Kayla850]

+1

The early R6 used the Thundercat front end so it should be a straight fit. You'll need the R6 wheel and calipers as well though. I don't think the original 3EN calipers will fit, the blue spots are miles better anyway.

Early R6 forks are 43mm, Thundercat are 41mm. 3EN calipers will fit on R6 or Thundercat forks. Not all blue spots are the same (Thunderace and Thundercat calipers are different and not as 'good', although still miles better than the original 3EN calipers)

You can use the 3EN wheel in the R6 forks using different bearings and spacers, and the discs are the same diameter and offset so you can use those too. It's cheaper to source some different bearings and a couple of spacers than an R6 front wheel and discs.

[Kayla850]

Another thing to look out for is the stem might be welded into the FZR yoke (I can't tell from the pic but the FZR600R one I had was welded), if so, whoever removes the stem will have to remove the weld then turn the stem down to size once it's removed.