Moditus attack - Fazer 1000 swingarm mod

[FJmonkey]

I had my linkage milled down to mimic the width of the FZ 1 swing arm. The depth of the bearing space was increased to allow stock bearings to be installed. As the swing arm needs to be milled , you will be at a machine shop anyway. The FZ1 bearings are the same size as the FJ so a stock set of FZ1 bearings will then work.
  I just couldn't see leaving it cantilevered out. But then maybe I am anal.

Good option. machine the the link to match the swing arm. Easier to transport and machine than welding and then ream.

[MOTOMYSZOR]

80% job done  


But still have few problems:

- I riveted only one pin in chain. On other one riveter refuse to cooperate so chain is half ready.
- Front and rear sprocket are perfect alignment.  But front sprocket (from Honda)  despite milling down one side left no space for teeth on washer. So I am not sure what to do now....
- Will be hard to fit my Neta exhaust.....







Overall I am extremely happy with effect. I can't wait for road tests.....
FJ dogbones are to short. Rear end is much higher. So I used Fazer 600 dogbones - few mm longer and now wheel is in very similar position as originally.

[FJmonkey]

Looking good, keep the reports coming...

[Pat Conlon]

I cut a 1/8" deep (0.125") recess in my Honda VFR sprockets to accommodate the locking washer for the c/s nut.

I would hate to have that nut spin off.

[MOTOMYSZOR]

First short test drive done  :yahoo:All works fine.


But now I have issue with steering, especially on parking speed ..... On every corner front wheel want turn deeper itself. I have to keep steering firmly......
Maybe it is back tyre:  170/60 almost worn.....


Problem with retaining washer is still unsolved, I have to think over something.

[movenon]

First short test drive done  :yahoo:All works fine.


But now I have issue with steering, especially on parking speed ..... On every corner front wheel want turn deeper itself. I have to keep steering firmly......
Maybe it is back tyre:  170/60 almost worn.....


Problem with retaining washer is still unsolved, I have to think over something.

Are you saying that the bike over steer's ?  You probably have already done this but go to the max PSI indicated for your front tire and see if it corrects. Just an idea.  Last year my first ride out in the neighborhood my FJ way over steered. I mean scary. Dawned on me that I hadn't checked the tire pressures after taking it out of hibernation. After proper inflation no problem.  Not an expert,  suspension problems baffle me.
George

[MOTOMYSZOR]

I found out what is wrong: gauge on my local petrol station lost accuracy. On both tyres was 30 PSI.
After pump up to 36 PSI on front and 42 PSI on back, over steering effect is minimal. New tyre should fix problem definitely

[MOTOMYSZOR]

Job done 

Last problem: CS sprocket and retaining washer solved. I used two short bolts and strong loctite glue. hopefully it will be as strong as I believe.
On photo only one in place:


Linkage system (combination as in Pat's FJ) survived all my tests.





All this mod I can describe in one word: STABILITY
Totally different feeling especially when I release more horses than normal 
I have to get used to, to new geometry and wider tyre, because so far my riding style on sharp bends and roundabouts I can describe as - DRUNK MASTER STYLE 
I believe that GSXR wheel mod is only cosmetical. For full effect stiffer swingarm is necessary.

[FJmonkey]

Looks good, thanks for the update.

[MOTOMYSZOR]

I still have problem with wheel alignment.....

In first configuration rear sprocket was flipped - as it was advised for me.  After many checks with chain alignment tool it looked that everything is OK.

But....
after every wheel rotation I could push chain to right side, chain was always on left side.



So I decided to flip back rear sprocket to factory position. And it is much better now. Chain is more centred on sprocket.
Again I checked alignment with tool and all seems to be OK.

I am not sure what that mean.... maybe my swingarm or frame is bend? or front sprocket have different offset......  or I just freaking out......  

[FJmonkey]

I like to use this for chain alignment.

http://www.ebay.com/itm/like/201296945126?ul_noapp=true&chn=ps&lpid=82

[Pat Conlon]

Hold on there Karol...Something's off.

1) Take your chain off

2) Align your back tire to your front tire with 2 straight edges. Note that the index marks on the swing arm blocks are not that accurate. You will see what I mean. Write down the difference between the left and right side index marks for you to use as a future reference. For example with the rear and front tires aligned the left side is 3.5 and right side is 3.0 hash marks.

3) Now with the front/rear wheels aligned check the sprockets with a laser (or straight edge) on the back sprocket...see where it points in relation to the front sprocket.

Yes, this is a pain, I know, but your chain and sprockets will thank you down the road.

[MOTOMYSZOR]

Still not road ready.....  

I discovered that front sprocket is noisy..... it's howling noise. especially when I speed up on higher gear from low speed (60-80 km/h) after that I cant hear anything.

On central stand It is this same noise as on this video: https://www.youtube.com/watch?v=c_cLRMix3KY

I checked everything:
- Wheels are in line
- wheel is in centre of swingarm.
- chain and rear sprocket checked 10 times with tool (like in FJmonkey link)

I did all road tests - roundabouts left/right, sharp bends left/right. I can drive slow or fast without touching steering. So from this side is PERFECT.

All looks OK.



Only this noise...... I set very loose chain slack - 4cm. Any ideas? Maybe it is because all components are new....
What slack will be proper for this modification?

[Pat Conlon]

Try more slack in the chain. With the back end raised, the angle of the swing arm vs the c/s sprocket means that the chain will tighten up considerably when the suspension compresses.
When you set the chain to the spec. slack with the bike on the center stand, then take the bike off the center stand and sit on the bike, you will see what I mean.
A loose chain is a happy chain

[MOTOMYSZOR]

I used longer dogbones from  Fazer 600 and swingarm is in very similar position as original FJ swingarm - So during ride slack will be not affected.

Now I have to find some garage with laser alignment tools for verify  my measurements.....

I know that I am overreacting, but with such major modification I want be sure that nothing wrong will happen on the road.....