190 rear on an 85 FJ1100???

[Motorheaddad]

I did a search to see if anyone has done this and I found one but no real detail. So I know it's possible, but is it too much of a tight fit? I noticed everyone is running either 180 or 170. I have two reasons for this question. The first and most important reason is my 92 GSXR wheel that I bought for the swap has a good 190 on it, the other reason is I think it would look cool with a 190. And I need a lot to make me look cool. Anyway, if anyone has fit a 190, please let me know how it went and how you squeezed it in and lined it up. Thanks in advance.

[movenon]

Short answer is it is to big... With a 180 you might have 3/16 - 1/4 inch clearance using a stock FJ swingarm. And even some 180's are to wide to use. Not all 180's are the same. Close, but not the same.
George

[aviationfred]

From my understanding a 190 tire should have a 6" rim. Also what George said.

A 180 is a tight, but doable size as long as it is not a Dunlop. I know for a fact that the Continental Conti-Motions 180 will fit. The Metzler Road-Tec Z6 180 will fit.

Fred

[Antonn3]

Fred might be correct with the Dunlop tire issue..
I have the 180 Dunlop Q2 tire on a Suzuki 5.5 inch rim and that damn thing measures 190 across widest point..
As for fitment in the swing arm... I have room, as the arm I'm using is from a FZ1000 .
I am using the offset front sprocket and after aligning the tires I have about 1/16" clearance to the chain.

Tony

[FJ_Hooligan]

Just because you CAN do something doesn't necessarily mean you SHOULD do it.  I can install 200 main jets in my carbs, but it won't improve the performance.

Just because its bigger doesn't mean it's better.  There are a lot of sport bike owners who change from a 190 tire to a 180 tire for better (quicker) handling.

But, if looks is what you're after, then beauty is in the eye of the beholder

[oldktmdude]

   A 190 probably won't fit. I use 180's on a '85 and have 3-4mm chain clearance. I have used Michelin Pilot Power 2CT, Pilot Road 3, Continental Road Attack 2, Pirelli Angels and Pilot Road 2  180/55-17 rears with no problems. Have not tried a Dunlop 180 due to members on this Forum having clearance problems with them. Try a 190 if you have it but I think you'll be changing it.   

[Motorheaddad]

Awesome! Thanks for your answers guys. I guess I'll be hunting for a 180. Thanks again.

[Flynt]

180 is a tight, but doable size as long as it is not a Dunlop.

Actually a 180 Dunlop Roadsmart will work fine...  The Q2 (and probably Q3) are 10mm wider than spec.  I have a 170 Q2 on and it measures 180mm and is the same width as the Michelin PR3 180 on my other bike.

Unless the number really matters, I think your best bang for the buck is the Q2...  but you will have serious problems with a 190.

Frank

[movenon]

From my understanding a 190 tire should have a 6" rim. Also what George said.

A 180 is a tight, but doable size as long as it is not a Dunlop. I know for a fact that the Continental Conti-Motions 180 will fit. The Metzler Road-Tec Z6 180 will fit.

Fred

Add to list of tires that will fit within the FJ swing arm "Michelin Pilot Road 3 180".
George  

[Flynt]

I think your best bang for the buck is the Q2... 

To elaborate, this set of Q2s are wearing just as nicely as the last...  really even wear with no flat spot on rear or triangle front.  They do go quick however, I think 3,000 - 3,500mi for my rear tire is going to be normal with these tires (my wrist may be part of the issue). 

I had the roadsmart Dunlops, but they did the flat/triangle thing in about 2,500mi on two sets as well.  Q2 is by far the better choice for an FJ.

Frank

[Pat Conlon]

I agree with others, a 180/55-17 is the way to go....

However, since you asked....

I'm going by memory, but I recall that a bloke over in the UK did a 190 on his FJ.
To keep the tire properly centered, he had to space the chain and sprockets over to clear the wide tire. When he tried to offset the back sprocket he found that the sprocket wheel studs and nuts were interfering with inside edge of the swing arm.
He removed the wheel studs and used machine bolts with the heads flush (countersunk) with the surface of the sprocket face. That way he could space out (offset) the back sprocket as close as possible to the swingarm allowing the chain links to just clear the tire and swingarm.
On the front countershaft sprocket he used a custom offset sprocket.

Cheers.   Pat

[FJmonkey]

I agree with others, a 180/55-17 is the way to go....

However, since you asked....

I'm going by memory, but I recall that a bloke over in the UK did a 190 on his FJ.
To keep the tire properly centered, he had to space the chain and sprockets over to clear the wide tire. When he tried to offset the back sprocket he found that the sprocket wheel studs and nuts were interfering with inside edge of the swing arm.
He removed the wheel studs and used machine bolts with the heads flush (countersunk) with the surface of the sprocket face. That way he could space out (offset) the back sprocket as close as possible to the swingarm allowing the chain links to just clear the tire and swingarm.
On the front countershaft sprocket he used a custom offset sprocket.

Cheers.   Pat

I wonder if a custom rear offset sprocket could be had for not too much$$$?

[fj1289]

A little late to the discussion, but here's how I did it on the drag bike --

(I know this is not a direct answer for you, since I did not use Suzuki parts, but I'm sure the principles could be applied)

Started with a 6" R1 rim.  Positioned it in an FZ1 swingarm all the way to the left (with no modifications to the sprocket carrier).  This positioned the rim offset 4mm to the right in the swingarm.  The FZ1 swingarm is 8mm wider than the FJ swingarm.  The "normal" modification removes 4mm from each side of the swingarm to fit -- I instead took all 8mm off the left side, which centered the rim in the chassis. 

I used a TRAC offset countershaft sprocket to align the chain.  This required slightly clerancing the frame to clear the chain -- same as many who have used the XJR output shaft needed to do. 

In the end -- good mod for the dragbike, probably a change for the worse for handling on a streetbike...

Good luck! 

[X-Ray]

Actually a 180 Dunlop Roadsmart will work fine... 
Frank

Yep, I've got the Dunlop Roadsmart II 180/55 and it has probably 4mm chain clearance. I actually took a gamble when I got this tyre fitted, but its all good,