Swing arm swap from FZR600 3HE to FZR400 3En braced version

This is the swing arm I intend to install. It is from an FZR 400 3en model and is made of aluminium so despite being braced it is actually a few ounces's lighter than the stock steel swing arm.
The plus is that it has had paddock bobbins holders installed already.It also came with the caliper holder(see notes below)

The 3En has identical width for inside the frame @222mm (including dust caps) and swing arm bolt diameter of 15mm. The rear axle is also the same at 17mm

As you can see there is plenty of room for a fatter tyre.
More on that later when I swap the rim for a 17" rather than the 18" standard.My reason for that swap will be the availabilty of tyres as 18" quality tyres seem to be disappearing ! I doubt I will increase the tyre width more tha 0.5" as I wish to keep the nimble feel of the FZR thro the corners

There are THREE significant GOTCHA's in this swap you have to cut your chain to thread it thro the bracing and that these bikes come with NO master link (spring link) they are all rivetted jobs so you will need a a chain rivetting tool to re-make your chain !!!!!

My local dealer rented me his for a deposit of 30 Quid which is not too shabby considering the cheapest I could buy is 70 Quid and the best about 110 Quid

I used the 3he dog bones & shock with no problem..
As you can see from this picture the rear caliper is hanging off the bike. That is the 2nd GOTCHA the 3he caliper does NOT fit the 3en caliper bracket.

The 3rd GOTCHA is that even with the 3en caliper it will not fit on the 3He rear disk which is 15mm approx larger than the 3en !!!!! There are two ways round this:-
A} the way I did it below
B} buy a 3en (I am told also a 1WG )caliper, the caliper bracket and the whole 400 rear wheel !!!!

My solution to the rear brake problem

I replaced the 3en caliper bracket(which came with the swingarm ) with the 3he (original) which is the same width across the axle fitting area.

Because the caliper stay bolt is 8mm diameter and the bolt that holds the brake master cylinder is also 8mm I decided to use 8mm Female Rose joints.

These are held apart by an 8mm diameter stainless steel rod threaded at each end to suit the rose joints.(while the computer math and the govt inspector seemed right I had nagging doubts about the diameter of the stay rod & changed it out to 12mm turned down to take 8mm threading to suit the rose joints )

I would have liked to have used left & right hand threads but I could not find my left handed 8mm die (GRRR.) So they are both right handed which will mean a bit of fiddling around when I tighten the chain later on.

All of this is held by s/steel aero-quality bolts + nuts so that nothing will vibrate loose

This shows the frame end of the tie rod

This shows the 3he caliper bracket & caliper end of the tie rod.

FZR back in one piece, complete with

custom stainless steel chain guard

Len of LUXOMATION's Design for a custom radiator guard, my stainless steel road tax holder (tag frame)with red anodised cover + radiator down hose in red silicon rubber

I still have a couple of RADIATOR Guards left from the second batch check the FZRONLINE.com guys for details

For further details E-Mail:- KGB-Racing at Saltmine dot Org dot UK Back to:- Project FZR This Page Sponsored by The Saltmine Org. UK   ©  Geo of K.G.B. of T & T.