FZR400 fork will fit on a XJR?

Forum rules
Please can you post items for sale or wanted in the correct For Sale section. Items / bikes for sale here will be removed without warning. Reasons for this are in the FAQ. Thanks
Ugo51
Settled in member
Reactions:
Posts: 31
Joined: Thu Mar 07, 2013 9:22 pm
FZR400 fork will fit on a XJR?

Post by Ugo51 » Thu Mar 07, 2013 9:35 pm

Hi guys,
couldn't find a specific section for the XJR400 ( :( ) so I rearranged my question to fit in here :whistle:
do you know if the fork from a FZR400 will fit on a XJR?
or, alternatively, do you know if any other fork will fit?

cheers

Evilchicken0
Site Supporter
Site Supporter
Reactions:
Posts: 9391
Joined: Tue Apr 29, 2008 8:59 pm
Bike owned: Bimota SB6 Yamaha FZR 3TJ x2
Location: Lundin Taan
Re: FZR400 fork will fit on a XJR?

Post by Evilchicken0 » Thu Mar 07, 2013 10:19 pm

I have to say I don't know much about the XJR so you're going to need to measure a few things
Diameter of the forks
Diameter of the disks

I can see sliding calipers ... they're a bit budget

What I reckon is a pair of forks and calipers but which ones will depend on what you have.

User avatar
thunderace
Site Supporter
Site Supporter
Reactions:
Posts: 2875
Joined: Fri Sep 10, 2010 9:03 pm
Bike owned: R6, YZF600R
Location: Blackburn, Lancs.
Re: FZR400 fork will fit on a XJR?

Post by thunderace » Thu Mar 07, 2013 10:26 pm

You should be able to fit 3EN1 forks, they are 41mm same as the XJR400. Then you can benefit from Thundercat/R6/Fazer Blue Spot calipers. I'm pretty sure they are the same length too give or take a few mm.
Conventional wisdom says to know your limits. To know your limits you need to find them first. Finding your limits generally involves getting in over your head and hoping you live long enough to benefit from the experience. That's the fun part.

Ugo51
Settled in member
Reactions:
Posts: 31
Joined: Thu Mar 07, 2013 9:22 pm
Re: FZR400 fork will fit on a XJR?

Post by Ugo51 » Fri Mar 08, 2013 6:35 am

thank you guys for the response :)

the fork stanchions are 41mm in diameter.
I'm not 100% sure about the rotors size, I guess it's the usual 298mm used on most Yamahas? I will check them out

do you know anything about the yokes size? the Thundercat has a larger rim than mine (3.5'' rim for 120/60 wheel, while I think mine is 2.5'' and I mount the 110/70)

What else could I measure to be reasonably sure of the feasibility of the work? what about the wheel spindle?


I go to check the discs

User avatar
thunderace
Site Supporter
Site Supporter
Reactions:
Posts: 2875
Joined: Fri Sep 10, 2010 9:03 pm
Bike owned: R6, YZF600R
Location: Blackburn, Lancs.
Re: FZR400 fork will fit on a XJR?

Post by thunderace » Fri Mar 08, 2013 8:42 am

You can use the FZR400 3EN1 wheel and fit a 120/70 to that, although I'm sure you can fit a 120 to the XJR wheel. You want 298mm discs, as opposed to the 282mm discs on the earlier 1WG, for the Blue Spot calipers.

To make life easy, just fit a complete FZR400 3EN1 front end with wheel and discs.
Conventional wisdom says to know your limits. To know your limits you need to find them first. Finding your limits generally involves getting in over your head and hoping you live long enough to benefit from the experience. That's the fun part.

Ugo51
Settled in member
Reactions:
Posts: 31
Joined: Thu Mar 07, 2013 9:22 pm
Re: FZR400 fork will fit on a XJR?

Post by Ugo51 » Fri Mar 08, 2013 8:44 am

thunderace wrote:You can use the FZR400 3EN1 wheel and fit a 120/70 to that, although I'm sure you can fit a 120 to the XJR wheel. You want 298mm discs, as opposed to the 282mm discs on the earlier 1WG, for the Blue Spot calipers.

To make life easy, just fit a complete FZR400 3EN1 front end with wheel and discs.
mh, interesting...
I can live with my discs and calipers, that's not an issue at the moment.
what I want to do is to find a front end from a bike that's not an import, so it will be easier to find spares in the future

i didn't know about the 282mm discs, I've always thought they are all 298.

Evilchicken0
Site Supporter
Site Supporter
Reactions:
Posts: 9391
Joined: Tue Apr 29, 2008 8:59 pm
Bike owned: Bimota SB6 Yamaha FZR 3TJ x2
Location: Lundin Taan
Re: FZR400 fork will fit on a XJR?

Post by Evilchicken0 » Fri Mar 08, 2013 9:26 am

Um ... actually ... The 3en1 is 38mm forks and the 282mm disks.

You want 3EN2, they had 41mm forks and 298mm disks.

UK bikes with 41mm forks are the ThunderCat FZR600R Foxeye and TRX850, the FZS Fazer also had them but I'm told the forks aren't the same, all are adjustable. I'd look to change the calipers because they might have different mounting bolt spacings, all the above use 100mm. The T'Cat and Foxeye's spindle is a bigger diameter than the 3EN2, the foxeye's wheel is a 3.5" and is the same as the 400 3TJ, they come in purple or white ... the TRX850 can be had in gunmetal.

I think the XJR uses a similar engine to the old XJ 600 you might be able to swap it with that or use a FZ600, but these are getting popular for aircooled racing which migh push the price up. Don't take my word on this though measure it all up first.

User avatar
Kayla850
NWAA Supporter
NWAA Supporter
Reactions:
Posts: 1170
Joined: Sun Apr 18, 2010 6:30 pm
Bike owned: Sunn Tzar S2
Location: County Durham
Re: FZR400 fork will fit on a XJR?

Post by Kayla850 » Fri Mar 08, 2013 9:35 am

thunderace wrote:You can use the FZR400 3EN1 wheel and fit a 120/70 to that, although I'm sure you can fit a 120 to the XJR wheel. You want 298mm discs, as opposed to the 282mm discs on the earlier 1WG, for the Blue Spot calipers.

To make life easy, just fit a complete FZR400 3EN1 front end with wheel and discs.
A 3EN1 front end is a bit of a backwards step as the forks are only 38mm, but 3EN2 (41mm) parts should be ok if the fork pitch (the distance across the fork tops measured centre to centre) is the same. The 3EN2 is 195mm. If it's not the same then you might have to mess about with spacers.

Out of curiosity (or is curiousity?), why do you want to change the forks for FZR400 ones? They probably very similar to XJR forks and they're not adjustable (unless you get some SP ones but they're the wrong sizes)

I love XJRs... I don't suppose you want to sell yours, do you? :pray:
Useful project bike parts and stuff and things-

www.projection-racing.com

Titanium and Aluminium nuts & bolts-

www.pjcfasteners.com

Ugo51
Settled in member
Reactions:
Posts: 31
Joined: Thu Mar 07, 2013 9:22 pm
Re: FZR400 fork will fit on a XJR?

Post by Ugo51 » Fri Mar 08, 2013 10:24 am

wow, thanks for these additional info :)

well, i don't want to get the FZR400 forks, also because it's an import as well, so it's not gonna be any improvement

my point infact is to get a fork from a bike that's common in the UK (FZS, FZR, YZF...)
now, summing up all the info I have to:
check the size of my discs
check the pitch of the fork
check the mounting distance of the caliper (I'm almost sure it's 85mm)

what about the forks from a XJ600? beside the single disc one, of course

User avatar
thunderace
Site Supporter
Site Supporter
Reactions:
Posts: 2875
Joined: Fri Sep 10, 2010 9:03 pm
Bike owned: R6, YZF600R
Location: Blackburn, Lancs.
Re: FZR400 fork will fit on a XJR?

Post by thunderace » Fri Mar 08, 2013 10:38 am

My bad, sorry :oops: Yes, 3EN2 is the 41mm forks, not the 3EN1 :oops:
Conventional wisdom says to know your limits. To know your limits you need to find them first. Finding your limits generally involves getting in over your head and hoping you live long enough to benefit from the experience. That's the fun part.


Post Reply

Return to “FZR - Workshop”