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Old 08-18-2008, 11:36 AM   #16 (permalink)
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You have a great bike, i would keep it the way it is. Those bikes will be like the Vincent Black Widow or some other collectable in 10-20 years. They are the best handling HDs made.

If you want to custom something, do it from scratch or try a *** bike.
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Old 08-20-2008, 03:35 PM   #17 (permalink)
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180/200 in mine

I installed a 180 on a 5.5 inch rim in my 89' FXR. It took some heating and bending at the upper struts to make an 8 inch gap and a change in the swingarm width. I could have gone for a 200 had I swapped the belt for a chain but I didn't want the noise and maintenance of a chain. I've had this setup for over a year now and bike rides and handles perfectly. I have some photos in the gallery if you'd like to see what it looks like.

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Old 08-22-2008, 10:01 AM   #18 (permalink)
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Very, very, very good looking fxr.
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Old 08-24-2008, 11:38 AM   #19 (permalink)
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Does normal offset sprocket fit in fxr?
And how off is max .500 .810 or what?
Im planning 200-18 tire for my fxr.
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Old 11-19-2008, 03:50 PM   #20 (permalink)
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I've built several wide tire bikes including an FXR. The largest tire you can fit into a stock frame without butchering it is a 150 ( depending on the manufacturer ). This is possible using a narrow belt or switching to a chain. You will also need to make adjustments to the rear sprocket in terms of alignment. Anything wider creates problems with the fender clearances.
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Old 12-02-2008, 12:29 PM   #21 (permalink)
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Jireh Cycles part#96-849 Offset Fat Tire Kit $149.95 will allow for 150/80-16 with 1.500" wide belt. Some trimming will need to be done on the lower belt guard and adjustments to axle spacers especially if you run 11" shocks to center the tire in the fender. Had to do a little trimming on the caliper mount to allow it to slide without binding.
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Old 12-13-2008, 12:00 PM   #22 (permalink)
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i dont get it. a 140 is plenty wide & still turns
go up over 160 & it costs a fortune, all sorts of issues, & wont turn for crap. is the OP just wanting the look thats been shoved down our throats by marketing? why do what EVERYONE else is????
FXR is meant to ride & out-perform ALL big-twin h-ds. why fight it?
i love when people think its a sportster, or are simply ignorant.
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Old 11-20-2009, 09:12 AM   #23 (permalink)
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With out cutting and welding plus using a chain final drive: a 160mm 16 inch.

I have a 150mm Avon Venom on my FXRT now.Plenty of room for a 160mm. We did need a dished rear sprocket and offset inner primary sprocket. wOULD YOU CALL THAT "the drive sprocket."?

Anything but the ridiculous look of a 130mm in the back on a bagger. ...ridiculous! A 160mm is just about right!

Using a Tsubaki Sigma 530 o ring chain. Very strong...10,600lbs breaking strength.

Plug eye, getting a wider rear tire to handle properly seems to be a function of:
1) Rear rim width vs rear tire width: 5.5 INCH WIDTH (for a 180mm)FOR THE REAR RIM WIDTH, UP to 6.25 inches rim width for a 200mm tire
2) Rear tire width vs FRONT tire width. A 120 or 130mupm front mates well with a 180 to a 200 rear.
WORSE POSSIBLE IS A 21INCH X90MM FRONT AND A 300+ IN THE REAR. Down right dangerous!


A 19 or 18 inch front wheel with a 100 to a 110mm TIRE width should carry 150mm to a 170mm rear. Use tables to mate tires with rims. Realize that things like tire profile and rim matching make big differences in how the bike lays over in a turn.
My best handling FXR runs a Pro One custom Frame, 30 degree rake, 17inch x130mm 70 profile front on a 3.5 inch wide 17incher by PMFR.
Rear is a 17X 190x50 series. Very low profile tires... tip top of the heap stickiness and carcass stiffness available in the market. Hi tech Ohlins custom suspension keeps the power on the ground!

Last edited by 1M$man; 11-20-2009 at 08:18 PM.
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Old 12-03-2009, 09:03 PM   #24 (permalink)
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I am planning to install a 160 rear tire on my 88 fxr. I have it mostly figured out. Does anyone know where to find a 1" or 3/4" belt for this application?
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Old 12-04-2009, 09:49 PM   #25 (permalink)
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My 86 has/had a 180 with a chain. Too close for comfort. 160 goes on easy. I do, however only run chains; belts are for trousers.

Acording too this guy you can squeeze a 200 in with a offsett front sproket. You have to space out the frame under the seat and change fenders. But the stock swingarm should be ok...

http://www.cas4.com/baker/offset-sprocket-09.htm
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Old 05-19-2012, 05:56 PM   #26 (permalink)
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I contacted Kenny Boyce about the FXR wid swing arm. He did not remember the details on widening the frame. What all come inthe kit?
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Old 05-19-2012, 08:37 PM   #27 (permalink)
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Quote:
Originally Posted by Ltank View Post
I contacted Kenny Boyce about the FXR wid swing arm. He did not remember the details on widening the frame. What all come inthe kit?
Did you notice the last post was 2.5 years ago? JIC

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Old 05-19-2012, 10:22 PM   #28 (permalink)
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Originally Posted by Homesick View Post
Did you notice the last post was 2.5 years ago? JIC

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these FNG are a hoot
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Old 05-19-2012, 11:02 PM   #29 (permalink)
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Quote:
Originally Posted by Unca Mike View Post
Depending on the tire, the biggest you can get with stock swingarm is a 150. Anything bigger and the tire hits the belt cover if not the fender. To go bigger you'd have to go to a different swingarm or a chain drive or both. Check out Chopper Guys in Vallejo, California. They make a lot of cool FXR parts like swingarms for bigger tires. Not cheap but good stuff. They have a website.

Good Luck
You suggested a 150 but my 1990 FXRS will only handle a 140 and there only can pass a kunt hair its that close. What year FXR can handle a 150 without a mod job?
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Old 05-20-2012, 05:16 PM   #30 (permalink)
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Quote:
Originally Posted by FXRS Carrera View Post
You suggested a 150 but my 1990 FXRS will only handle a 140 and there only can pass a kunt hair its that close. What year FXR can handle a 150 without a mod job?
I've never tried it as I'm happy with the 130, but 140's the widest I've ever read that'll fit.

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