West Coast,RSA summer project

[aviationfred]

Aj,
Just bit of advice.  I have done two USD front end conversions, one with an 2008 R1 front end, and one with a 2008 ZX14 front end.  For the R1 I used an FZ1 top triple and bars; this worked out well.  For the Zx14 I have a modified ZX14 top triple and LSL bars.  Not so great....I am on my second set of bars.  

If I had a "do over", I would go with the adjustable clip on bars like Fred did along with Dan's extensions.  This approach gives much more flexibility as you will need to manage interference points between the tank and fairing and find a good riding position.  My thoughts.

On the bottom triple, in the R1 case, my machinist had to lengthen the FJ stem (as it appears in your pic) and then press in.  This allows for the greater thickness of the R1 bottom triple.  

In the ZX14 case, the ZX14 stem can be used by using the bottom Zx14 bearing and race.  The top of the stem needs to be turned down to fit the top FJ bearing.

I found the R1 fork springs were fine, but I did have to replace the ZX14 springs as they were too soft.

Jeff

Hi Jeff

Thank you for your input and advice on the top triple between the 2 different modifications.
I searched the info on FZ1 top triple as you suggested. It has an offset of 25mm,same as the '08 R1.
The '98-'02 R1 front-end that I have,has an 35mm offset,same as the FJ.
I'm going to fit the front-end tomorrow to get measurements for fork extenders,modify ignition switch and the stops.
Going to use the R1 top triple.
The handlebars will be sort out when I start assembling after the powdercoating of the frame and swingarm.

Hannes

MINE has a really terrible turning circle. (R1 early model front end). Interested to hear how yours is. Looking at ways to improve.

I agree, this is an unfortunate side effect. With the combination of the 50mm fork leg and the additional thickness of the extention, I positioned the extention in a way that the flange for the pinch bolts were facing in towards each other. This allowed the smooth part of the extention to contact the frame near the steering head as a steering stop. Steering radius IS GREATLY REDUCED.

Fred

[aj52]

Just an update on project.

The frame and swingarm are in for sandblasting and powdercoating on Monday(businesses only open on up after the holidays on Monday).
I went for matt black.

I removed the bearings on the swingarm as I think it is time for new ones.
The top steering bearings are toasted after only about an year and half,so replacing that also(water damage).

I ran into a problem with availability on swingarm bearings.
So my question is as follows:
The bearings # that I removed are: BHKM 1730 JU(Koyo) and other is TA 2530 Z (IKO).

The ones that I can locate here are both 15mm in length,it should be 30mm.
The sales rep suggested that I then use 2 bearings to make up the length.
Can I do that? I don't want to waste money on bearings that will give me trouble along the way.
Or maybe someone knows of alternative bearing #( Timken,SKF,NSK)for the swingarm.

Thanks
Hannes

[Pat Conlon]

The Partzilla page on the 1992 FJ swing arm shows the bearings still available from Yamaha.
https://www.partzilla.com/catalog/yamaha/motorcycle/1992/fj1200ad/swing-arm

[aj52]

The Partzilla page on the 1992 FJ swing arm shows the bearings still available from Yamaha.
https://www.partzilla.com/catalog/yamaha/motorcycle/1992/fj1200ad/swing-arm

Thanks Pat

[aj52]

Powdercoated frame

[aj52]

Powercoated swingarm

[Pat Conlon]

Hannes, the 2 pdf's (above) are the same picture of your swing arm and lower frame cradle. (looking good!)

Also, check out RPM's offerings on swing arm goodies. They ship to RSA
http://rpmracingca.com/search.asp?pg=1&stext=swing+arm&sprice=&stype=&scat=&sfil0=

[aj52]

Hannes, the 2 pdf's (above) are the same picture of your swing arm and lower frame cradle. (looking good!)

Thanks Pat,did not notice that I have loaded same photo twice.
For the one or other reason I don't know why,I must convert photo's to pdf as it doesn't want to upload jpg files.
Here are the frame.

[giantkiller]

Hannes, the 2 pdf's (above) are the same picture of your swing arm and lower frame cradle. (looking good!)

Thanks Pat,did not notice that I have loaded same photo twice.
For the one or other reason I don't know why,I must convert photo's to pdf as it doesn't want to upload jpg files.
Here are the frame.

I can't get photos to upload anymore either. I can to all the other forum's I belong too. And anywhere else for that matter. Just can't here anymore.

[aj52]

Received the fork extenders from father-in-law.
Want to powdercoat it gold as the forks,if they have gold available

[aj52]

Front end fitted today.

[FJmonkey]

Looking good.

[fj1289]

Clever way to retain the stock top clamp - and stock ignition switch and fork lock

[aj52]

Clever way to retain the stock top clamp - and stock ignition switch and fork lock

Yes,luckily it work out that way. I took a change to let the extenders be manufactured that way. I am using the stock clip-ons as well. So it is just the bottom triple tree of the R1 that I am using,with the FJ stem pressed into it.

Here are the dimensions for the extenders. The OD of piece that goes over the forks,is 60mm,enough space between frame and extenders.

[aj52]

Looking good.

Thanks Mark.
I wil repaint engine this coming December,as it look a bit of neglected in comparison with frame