Rear and front mod

[Mamparra]

Morning thanks for a fantastic page.

I have a1990 FJ 1200 and want to change front and rear.

Rear I bought a 2002 YZF 1000 swing arm with brake calipers blue dot.

Front still need to purchase.

Looking at previous posts it looks like a 87/88 YZF tripple clamp.

Shocks and wheels R6.

Why R6 won't R1 do?

Thanks from sunny SA

[Millietant]

It'ss bit unclear what your plans for the front are, the triple clamp is the least of your worries for a front end swap. The 3 favourite options for a complete swap are, ranked in simplicity

1) FZR 1000 EXUP RU (USD forks, 320mm discs, 3.5" x 17" wheel) with Yamaha blue spot Monoblock brake callipers and matching master cylinder. This issues the standard FZR triples, as their stem is the same as the FJ

2) YZF 750 R (same benefits) with the same braking upgrades.

3) Suzuki GSXR 1000 (later model with radial mount calipers)

The first swap is very straightforward, the other are are more complex, with the GSXR needing specialist machined parts to get the correct fork length and other modifications - but you get the best suspension and brakes.

There are a few FJ's around that have had complete R1 suspension and running gear transplants. It's not straightforward, but it's do-able as long as you have access to suitable tools and machinery.

[mike g]

think problems at the back are chain run and tyre width, even with an offset gearbox sprocket, chain wont move far enough before hitting the frame for anything bigger than a 170 tyre if you wanted it centered

[giantkiller]

think problems at the back are chain run and tyre width, even with an offset gearbox sprocket, chain wont move far enough before hitting the frame for anything bigger than a 170 tyre if you wanted it centered

I have 190s on 600gsxr rear wheels on some of my fjs. Ordered gsxr 750/1000 wheels. Got gsxr600 wheels. Had to figure out the spacers myself. Had them made. Used gsxr caliper mounts. Underslung calipers and cut the mounting tab off the top of the swingarm for the torque arm. And had it welded on the bottom. I also used Honda counter shaft sprockets. Off set was perfect had to have the sprocket machined around the nut to counter sink it into the sprocket chain alignment is perfect. I would post pictures but can't get them to since new forum format.

[Pat Conlon]

Several of us use 180/55-17 tires on 5.5" rims with no problems using an offset countershaft sprocket.  Adjustment is recommended for raising the back end ride height, no problems with shorter dog bones ('88-95) or a height adjustable shock ('84-87)

Cheers

[Mamparra]

Thanks for all the information.

I'm going with a YZF front end with tripple clamp.

Rear a YZF 17inch wheel.

Will it be possible to fit the whole rear swingarm?

[Pat Conlon]

No....Not without modification. There are many things to consider. I don't know your capabilities, but this project is not for the faint of heart.

Read this: https://fjowners.com/index.php?topic=3148.0

[joebloggs]

Thanks for all the information.

I'm going with a YZF front end with tripple clamp.

Rear a YZF 17inch wheel.

Will it be possible to fit the whole rear swingarm?

If you're bikes the CV, and you're going with the straight spoke front wheel then A Hayabusa swingarm, wheel etc may be your easiest fit, the arm bolts straight in with just a couple of spacers to centre it. The shock tunnel of the BUSA is huge and allows the shock to line up with the FJ linkage without hitting anything, the real problem could be the width of the arm and clearance on the exhaust and footrest hangers, I have after market so wasn't an issue, but I didn't get to try it with the stock parts in place.
The Suzuki has a 6"rim to take a 190 tyre but 180 would work fine, just a case of working out the offset for the front sprocket.