FZR400 3EN swing arm swap How-to

[yamaha_george]

Hi,
well I am back and been busy whilst away writing the FZR400 3en Braced alloy swing arm swap How to:-


http://www.saltmine.org.uk/fzr/swingarm.html

WIKI moderator feel free to transfer to the 600 & how-to sections

[haunter]

looks good!

[yamaha_george]

looks good!

H,
Thnx, it is a straight bolt in to the 6 BUT there are 2 GOTCHA's both explained in the page neither is major but you do have to engineer a bit or be prepared to by a rear caliper from a 3en (or a 1wg I am told but cannot confirm first hand )

[haunter]

too bad that limey ahole wouldnt honor that super cheap 3EN auction ebay wouldnt let me win

[sweekster]

Awesome write up George.

[M in KC]

Nice work George. That 3EN swinger looks like a beefy dude when compared to the 3HE jobber. Now off to find one at a reasonable price. I'm thinking that swinger arm and a '06-'08 R6 rear mono shock and you just might have the bee's knees of rear suspension setup on the 3HE's

[mszilves]

Very nice George, looks good! Just curious, how wide is this swingarm at the axle? I wonder if a YZF wheel will work on this?

[haunter]

the 3EN is indentical to the US FZR400 swinger, except it has bracing.

[yamaha_george]

the 3EN is indentical to the US FZR400 swinger, except it has bracing.

H,
from my little purple book

you are right about width at the axle & @ the pivot width & bolt are the same as the 3he ie original 600 but it is 25mm longer pivot to axle mid point of adjustment it is 10mm wider where the tyre sits. it is also 25mm deeper throated (axle at mid point to hitting the inside center of the arm by 25mm. plus the bracing is 385% stronger against flex according to my friend with a computer program that predicts such things.

this can be increased substantially by going from17mm axle to 20mm & suprisingly little is gained by going from the 15mm pivot bolt to 20mm. which would have been my personal move if I was going to permanently alter the bikes engineering from being returnable by any owner after me wanting to do a full on restoration.

If a 17" wheel is fitted then all these spaces increase thus allowing some serious tyres to be fitted without I trust chain on tyre wear.

the better swing arm over our old steel job is 3TJ but that does require alteration to the frame that is permanant and is suprisingly stiff against the original steel version & extruded alloy of the 1wg.

[haunter]

I meant the 3EN1 is a 1WG, with bracing, not a 3HE, sorry. In my pics posted is the 3EN1 I had from China Racer Steve, on top of the 1WG I got from RageDigital

[yamaha_george]

I meant the 3EN1 is a 1WG, with bracing, not a 3HE, sorry. In my pics posted is the 3EN1 I had from China Racer Steve, on top of the 1WG I got from RageDigital

H,
I did not mis-understand you the pictures made it clear what you were on about .

I added the 3HE references for the others that read this and see why the 3en & 1Wg will work and why if the choice is there to use the 3en rather than a1WG as a straight swap out bearing the two Gotcha's I refer to in my How to <BG>

I have the 3en caliper as well so I will try and shoot that for the how to as well so either it OR the tie bar solution can be used

[95FZR600]

Very nice write up but you didnt have to cut anything! Thats not right at all.

[haunter]

I meant the 3EN1 is a 1WG, with bracing, not a 3HE, sorry. In my pics posted is the 3EN1 I had from China Racer Steve, on top of the 1WG I got from RageDigital

H,
I did not mis-understand you the pictures made it clear what you were on about .

I added the 3HE references for the others that read this and see why the 3en & 1Wg will work and why if the choice is there to use the 3en rather than a1WG as a straight swap out bearing the two Gotcha's I refer to in my How to <BG>

I have the 3en caliper as well so I will try and shoot that for the how to as well so either it OR the tie bar solution can be used

gotcha I misunderstood then

[yamaha_george]

Very nice write up but you didnt have to cut anything! Thats not right at all.

95,
the only cutting as you put it, was to make the tie rod and that is not essential if you have the 3en caliper & its bracket.

I will add that set of pictures when i have done that too :-}

[dru86]

The R6 shock won't work with this swingarm the bracing hits the reservoir, this is one of the reasons I swapped to the 3en2, that and the fact that the 3en2 is 1.5kg lighter.

George, If you want to use the 3en hanger you're going to have to get a fzr400 wheel as it uses a 210mm disc opposed to a 240mm. A 400 caliper needs to be used with a 400 wheel (The 400 1wg and 3en use the same rear calipers) or do what I did and have a small amount of material removed form the bottom of the caliper.