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89 discs to 86 wheel

Started by sandspider, March 10, 2013, 01:14:22 PM

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Bezmozek

I can NOT do 17" front due to local law. So I have to stay with 16".
I do not like those V-max adaptors, it is just aesthetic opinion, unsprung weight, they are for bigger discs and for same price I can have ´89 FJ1200 forks.
If triple tree is same, I can fit forks directly. From picture posted by aviationfred I assume that is no problem to fit 16" rim but don´t know if I´ll need spacers or different axle.
FZ1 2006+ silver dot calipers are likely identical to R1/R6 blue/gold dots (aesthetic again) and if i can keep current MC, only new 282mm rotors needed.
Is this correct, any issues?
Thank you

´85 FJ 1100

FJmonkey

The 89 forks will fit the triple tree, the 86 wheel will fit on the 89 forks. the caliper position on the 89 forks is for a larger rotor so the calipers will not properly engage the rotors. But this too can be adapted at the cost of cosmetics and un-sprung weight. It is a shame you can't use the 89 front wheel, it is a standard FJ part, just not for the 84 to 86 (87) years.  But we also understand some countries have strict rules on vehicles that prevent modification, even if that modification improves the vehicle or makes it safer. If you install the RPM fork valves you could have the AD holes welded up. That would be a huge improvement in front end handling and a smoother ride.
The glass is not half full, it was engineered with a 2X safety factor.

'86 Ambulance - Bent frame, cracked case, due for an overhaul
'89 Stormy Blue - Suits my Dark Side

Firehawk068

Quote from: Flynt on May 22, 2017, 07:44:39 PM
  It helps that I'm slow.

Frank, you might be able to sneak this past one of the new guys, but not us Regulars.  :drinks:
Alan H.
Denver, CO
'90 FJ1200

Pat Conlon

Fred, it looks like you used the '89 forks and blue spots *without* adapters on the smaller dia.'84/87 rotors and 16" wheel.
Am I seeing this correctly? Did you have proper pad/rotor coverage with this set up?

If so...Bezmozek would not need the adapters. He would just need the '89 forks and axle....and blue/silver/gold axial monoblocks.
The eBay link to some (narrower) single faced rotors will help vs. the wider oem double faced (vented) rotors.
Again, but it looks like the 298mm vs 282mm diameter rotor difference is not an issue.

Bezmozek: To get the best out of the monoblock calipers, I suggest replacing the oem 5/8" master cylinder with a 14mm master. I use the 2002 FZ-1 although several other models can work...the key is the 14mm piston.

Quote from: aviationfred on March 10, 2013, 06:20:44 PM
My 89' came with a 16" front wheel that the PO had installed. I have no idea why. Installing the Blue Dot brake mod was the 1st mod I did. Due to my ignorance at the time, I read that the Blue Dots bolted right on to my forks. It never occured to me that the rotors on the first gen wheel were not the same diameter as what came on the 89' 17" wheels.

The 16" wheel will work with the Blue Dots and 89' forks. As stated in previous posts. Install a 17" wheel. I only had the 16" wheel in use for a month or so. If interested, I do have a 89' 17" wheel that is available.

Fred


1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

Bezmozek

This picture is why I was asking about changing calipers & fork only, just don't like quotations with pictures  :sorry:
In adapters description it says that 298mm rotors needed, so same as with 89+ fork instead.
As I have to buy new rotors anyway, there was I think possibility to buy 300mm rotors for V-max, if those 2mm fit in calipers and those should be bolt on  :scratch_one-s_head:
http://www.ebay.com/itm/Supermotard-300mm-Front-Brake-Disc-Rotor-For-Yamaha-XT660-R-XT660R-2004-2016-/142302889611?hash=item2121e9c68b:g:gGYAAOSwv0tVOeq9&vxp=mtr
http://www.ebay.com/itm/300mm-2-Front-Brake-Disc-Rotor-for-Yamaha-FZ6-FZ6S-Fazer-04-08-XJ6-600-09-10-11-/142295666373?hash=item21217b8ec5:g:-4kAAOSweW5VOehi&vxp=mtr

Somewhere here was link to a list where was possible to search rotors by diameters, BDC etc. but I can't find it again. :dash2:
´85 FJ 1100

Mike Ramos

Quote from: Firehawk068 on May 22, 2017, 08:46:47 PM
Quote from: Flynt on May 22, 2017, 07:44:39 PM
  It helps that I'm slow.

Frank, you might be able to sneak this past one of the new guys, but not us Regulars.  :drinks:

Correct Alan:  Even two up Frank isn't slow.  Just a tad slower but that still ain't slow...!

Another Regular.

Pat Conlon

Quote from: Bezmozek on May 22, 2017, 10:21:58 PM

....Somewhere here was link to a list where was possible to search rotors by diameters, BDC etc. but I can't find it again.

See if this helps: http://www.fjowners.com/index.php?topic=8623.0
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

aviationfred

The '89 that I ride today is the same one that came with the 16" wheels when I purchased it. The following photos show the '84-'86 wheels and rotors with the OEM '89 brake calipers. I will say that the axle, speedo drive and right side spacer were OEM for the '89 and will work with the 16" wheel. It was over 5 years ago and I can't remember looking to see how well the OEM brake pads or the blue dot brake pads contacted the vented rotors.


Fred
I'm not the fastest FJ rider, I am 'half-fast', the fastest slow guy....

Current
2008 VFR800 RC46 Vtec
1996 VFR750 RC36/2
1990 FJ1300 (1297cc) Casper
1990 VFR750 RC36/1 Minnie
1989 FJ1200 Lazarus, the Streetfighter Project
1985 VF500F RC31 Interceptor

simi_ed

Yup!  Not slow. Nice try! :good:
-- RKBA Regards,

Ed
===
Ed Thiele 
Simi Valley, CA -- I no longer have SoCal manners.
'89 FJ12C (Theft deterrent Silver/White)


- All that is necessary for the forces of evil to win in the world is for
enough good men to do nothing.

- Edmund Burke

Bezmozek

Thank you everybody for info and patience with newbie.

Google says that I need XVS 650 Drag star rotors for perfect fit
http://www.ebay.com/itm/FRW-1x-Front-Brake-Disc-Rotor-For-YAMAHA-XVS-650-DRAG-STAR-CLASSIC-98-07-00-01-/302150873085?hash=item4659986ffd:g:rOMAAOSwj85YO4Vo&vxp=mtr
I will let you know.
Thanks again
´85 FJ 1100

Pat Conlon

I would look for semi-floating or floating rotors.
Reason: The FJ is a heavy bike. The 15mm front axle (small by today's standards) deflects under load. When the axle deflects, the wheel and rotors deflect. The axial mounted brake calipers and pads do not deflect. See the conflict?
A semi/full floating rotor will allow for this deflection. A rigid mounted rotor, not so much.

Just my opinion.
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

krusty

On my 84 I have fitted 89 forks and calipers. All I needed then was to fit early Vmax discs. No adapters required.
91 FJ1200
84 FJ1100 x 2
85 FJ1100
89 GL1500
76 CB750F1
72 CB350F
63 C92 x 2
59 C76
62 C100
63 C100
60 Colleda 250TA x 3
63 Suzuki MD50
77 DT125E
77 DT175E x 2
79 DT250F

ribbert

Quote from: Pat Conlon on May 23, 2017, 01:09:01 PM
I would look for semi-floating or floating rotors.
Reason: The FJ is a heavy bike. The 15mm front axle (small by today's standards) deflects under load. When the axle deflects, the wheel and rotors deflect. The axial mounted brake calipers and pads do not deflect. See the conflict?
A semi/full floating rotor will allow for this deflection. A rigid mounted rotor, not so much.

Just my opinion.

Pat, wouldn't deflecting rotors push the pads back?

Noel
"Tell a wise man something he doesn't know and he'll thank you, tell a fool something he doesn't know and he'll abuse you"

Pat Conlon

Yep, but not evenly. You could experience uneven tapering pad wear.
The primary reason for floating/semi floating rotors is to allow for expansion/contraction.
Most, if not all rear brakes use fixed rotors, not so on the front.
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

Bezmozek

2 krusty: What diameter of rotors are those?
I figured out, that possible issue can be fitting blue dots inside 16" rim as gap between rim and 282mm disc is tight already and if I increase to 298mm, not sure if there will be enough space.
As blue dots are way bigger than OEM, I am thinking about switch to FJ1200 calipers instead.
Other way is to bolt on rotors to rim with calipers on already, but quite complicated for later service  :nea:

Edit:// BTW: Does anybody here know weight difference between 1100/1200/blue dot calipers?
´85 FJ 1100