Swingarm pivot point width's!

[jeff kushner]

Mornin guys,

I am hoping that someone knows and can post the width for a '74 GT750 swing arm for me. I'm getting ready to build my bike in the next couple of months so I'm gathering all the parts, pieces and information ahead of time so I have a smooth build process. So, what's the width of the pivot point. What I would really love is if someone could post a picture with all the measurements shown since there are many more factors to consider than just the width of the pivot point but this is just a starting point.

For my part, I've gathered a pretty extensive list from the net and have posted it below:

jeff

Honda VTR SUPERHAWK (all years) - 165mm
Honda VFR 800 (1998-2001) - 165mm
Honda CBR 929 (2000-2001) - 180mm
Honda CBR 954RR (2002-2003) - 180mm
Honda RC51 SP2 (2002-?) - 180mm
1976 Suzuki GT500 - 185mm
Yamaha XS650 - 190mm
Honda VFR400 - 192mm
Honda MC18 NSR250 - 197mm
Yamaha FZR250 - 200mm
Honda XL600R - 200mm
Yamaha LC RD350 - 200mm
Honda RVF400 - 202mm
Honda NS400R - 205mm
Honda MC21 NSR250 - 205mm
Honda CB400F - 205mm
Suzuki RGV250 - 205mm
Yamaha RZ350 - 205mm
Yamaha YPVS RD350 - 205mm
1986 FZ600 - 215mm (without spacers/covers), - 220mm with spacers/covers
Suzuki Bandit GSF600 - 220mm
1992-1998 Yamaha Seca II - 220mm
1990-1996 Yamaha FZR600 - 220mm
2005 Suzuki GSXR 1000 - 225mm
1976-1982 Kawasaki KZ600 - 225mm
1994-1997 Honda VFR750 - 227mm
2001-2002 Suzuki GSXR1000 - 228mm
Kawasaki Z650/Z750 - 230mm (frame width at pivot)
2004-2005 Suzuki GSXR750 - 230mm (without washers on ends)
Suzuki TL1000S - 232mm
Honda Hawk GT650 - 235mm
Honda RC30 - 235mm
2008 Kawasaki Ninja ZX6R - 235mm
Kawasaki Z900/Z1000 - 235mm (frame width at pivot)
Honda RC30 - 235mm
1999-2002 Suzuki SV650 - 235mm
2006 Suzuki GSR500 - 238mm (w/o spacers)
2003-2009 Suzuki SV650 - 240mm
1998-2007 Yamaha YZF600R - 240mm
1990-1993 Honda VFR750 - 242mm
2005-2006 Kawasaki Ninja ZX6R (636) - 242mm
1987 Kawasaki Ninja ZX750R - 244mm
1987 Yamaha FZ750 - 245mm
2006-2011 Kawasaki Ninja 650R - 245mm
1998-2003 Suzuki Katana GSX600/750F - 245mm
2007 Yamaha YZF-R6 - 248mm
Honda RC45 - 250mm
Sucati SR4S - 255mm
2003 Kawasaki Z1000 - 255mm
MV Agusta F4 - 255mm
Kawasaki ZX10R (Gen 1-3) - 257mm
2002-2005 Yamaha FZ1 - 257mm (20mm pivot bolt)
2001 Yamaha YZF-R1 - 250mm
2003-2006 Yamaha YZF-R1 - 260mm (without caps) - 264mm (with caps)
Triumph 955i - 285mm
BMW K100 - 310mm

Unsorted

GT500 '76 185mm
SV650 K5 240mm
VFR400 192mm
RVR400 202mm
NS400R 205mm
XS650 190mm
FZR250 200mm
MC21 NSR250 205mm
GSF600 bandit 220mm
CB400F 205mm (inside frame) 14mm pivot bolt. Verified by me.
MC18 NSR250 197mm
'86 FZ600 215mm (without spacers/covers)
RZ350 205mm
05 GSXR 1000 225mm
Z900/Z1000 235mm (frame width at pivot)
Z650/Z750 230mm (frame width at pivot)
LC RD350 200mm
YPVS RD350 205mm
Gen 1-3 ZX10R 257mm
XL600R 200mm
MV Agusta F4 255mm
VTR SUPERHAWK (all years) 165mm
CBR 954 RR (2002-2003) 180mm
CBR 929 (2000-2001) 180mm
VFR 800 (1998-2001) 165mm
RC51 SP2 (2002-?) 180mm
RC30 235mm
RC45 250mm
NSR150 197mm (outside of pivot including spacers) 15mm pivot bolt. Verified by me.
CB360 205mm with 14mm pivot bolt. Verified by CrazyPJ
GT500 '76 185mm
SV650 K5 240mm
VFR400 192mm
RVR400 202mm
NS400R 205mm
XS650 190mm
FZR250 200mm
MC21 NSR250 205mm
GSF600 bandit 220mm
CB400F 205mm
MC18 NSR250 197mm
'86 FZ600 215mm (without spacers/covers)
RZ350 205mm
05 GSXR 1000 225mm
Z900/Z1000 235mm (frame width at pivot)
Z650/Z750 230mm (frame width at pivot)
LC RD350 200mm
YPVS RD350 205mm
Gen 1-3 ZX10R 257mm
XL600R 200mm
MV Agusta F4 255mm
VTR SUPERHAWK (all years) 165mm
CBR 954 RR (2002-2003) 180mm
CBR 929 (2000-2001) 180mm
VFR 800 (1998-2001) 165mm
RC51 SP2 (2002-?) 180mm
RC30 235mm
RC45 250mm

Other info
Honda VFR ('90-'2003+), Hawk, RC30/45, NSR250 all use the same relative rear wheel offset. i.e. mix and match wheels amongst the various models and so long as the spindle face is unmolested the wheels will remain centered.

VTR SUPERHAWK -
Swingarm Length - 486.5 mm (19.15")
Swingarm Pivot Width - 165mm (6.495")
Rear wheel opening - 249mm (9.80")

CBR 954 RR
Swingarm Length - 532.25 mm (20.95")
Swingarm Pivot Width - 180mm (7.08")
Rear wheel opening - 249mm (9.80")

VFR 800 (1998-2001)
Swingarm Length - 515.5 mm (20.30") *** This measurement is with the rear hub adjusted forward... I'm not positive it's 100% as far forward as it can go, but it's about as close as I felt comfortable moving it.
Swingarm Pivot Width - 165mm (6.495")


Other notes...
The rear axle on the VTR is 20mm dia. the CBR 954 is 25mm dia.
Both the VTR and 954 have 25mm of adjustment from wheel full forward to full back.
The pivot bolt diameter for the VTR and VFR is the same. The CBR is considerably larger.
VTR SUPERHAWK (all years) SlowHAWK
Swingarm Length - 486.5 mm (19.15")
Swingarm Pivot Width - 165mm (6.495
Rear wheel opening - 249mm (9.80")
Swingarm Pivot Bolt - 20 mm/dia
Wheel Axle Bolt - 20 mm/dia


CBR 954 RR (2002-2003) SlowHAWK
Swingarm Length - 532.25 mm (20.95")
Swingarm Pivot Width - 180mm (7.08")
Rear wheel opening - 249mm (9.80")
Swingarm Pivot Bolt - 25 mm/dia
Wheel Axle Bolt - 25 mm/dia


VFR 800 (1998-2001) SlowHAWK
Swingarm Length - 515.5 mm (20.30")
Swingarm Pivot Width - 165mm (6.495")
Swingarm Pivot Bolt - 20 mm/dia


RC51 SP2 (2002-200?) hawkter996
swingarm minimum axle to pivot length-530mm
swingarm pivot width 180mm
Swingarm Pivot Bolt - 20 mm/dia
Wheel Axle Bolt - 25 mm/dia


CBR 929 (2000-2001) Tweety
Swingarm Length - 533 mm
Swingarm Pivot Width - 180 mm
Rear wheel opening - 249 mm
Swingarm Pivot Bolt - 25 mm/dia
Wheel Axle Bolt - 25 mm/dia


Honda VFR ('90-'2003+), Hawk, RC30/45, NSR250 all use the same relative rear wheel offset. i.e. mix and match wheels amongst the various models and so long as the spindle face is unmolested the wheels will remain centered.
90-93 VFR (shock linkage mount is two lobes on bottom of swingarm)(shock end is a 'fork')
Length: 565
Pivot width: 242 (+3.5 thrust collar)
Pivot diameter: 20
Eccentric outside diameter: 105
Eccentric width: 70 (+3 crenelated 'edge')
Caliper carrier diameter: 75
Caliper carrier width: 14
Brake rotor diameter: 255
Brake rotor mount diameter: 110
Sprocket mount diameter: 175
Wheel drive diameter: 100

94-97 VFR (shock linkage mount is one lobe on bottom of swingarm)(shock end is an 'eye')
Length: 560
Pivot width: 227 (+3.5 thrust collar)
Pivot diameter: 20
Eccentric outside diameter: 105
Eccentric width: 70 (+3 crenelated 'edge')
Caliper carrier diameter: 75
Caliper carrier width: 14
Brake rotor diameter: 255
Brake rotor mount diameter: 110
Sprocket mount diameter: 175
Wheel drive diameter: 100

Hawk (shock is direct-mounted to top of swingarm)(shock end is an 'eye')
Length: 545
Pivot width: 235
Pivot diameter (right): 15
Pivot diameter (left): <22
Eccentric outside diameter: 105
Eccentric width: 70 (+3 crenelated 'edge')
Caliper carrier diameter: 75
Caliper carrier width: 14
Brake rotor diameter: 240
Brake rotor mount diameter: 100
Sprocket mount diameter: 165
Wheel drive diameter: 100

RC30 (shock linkage mount is two lobes on bottom of swingarm)(shock end is a 'fork')
Length: 530
Pivot width: 235
Pivot diameter: 20
Eccentric outside diameter: 105
Eccentric width: 70 (+3 crenelated 'edge')
Caliper carrier diameter: 76
Caliper carrier width: 13
Brake rotor diameter: 220
Brake rotor mount diameter: 110
Sprocket mount diameter: 140
Wheel drive diameter: 85

RC45 (shock linkage mount is two lobes on bottom of swingarm)(shock end is a 'fork')
Length: 540
Pivot width: 250
Pivot diameter: 20
Eccentric outside diameter: 117
Eccentric width: 77 (+3 crenelated 'edge')
Caliper carrier diameter: 76
Caliper carrier width: 13
Brake rotor diameter: 220
Brake rotor mount diameter: 110
Sprocket mount diameter: 140
Wheel drive diameter: 85

RVF400 (shock linkage mount is two lobes on bottom of swingarm)(shock end is a 'fork')
Length: 540 (??)
Pivot width: 215
Pivot diameter: 20
Eccentric outside diameter: 105 (??)
Eccentric width: 60 (+3 crenelated 'edge')
Caliper carrier diameter: 76 (??)
Caliper carrier width: 15
Brake rotor diameter: 220
Brake rotor mount diameter: 110
Sprocket mount diameter: 140
Wheel drive diameter: 85

NSR250 / mc28
Wheel drive diameter: 85

MV Agusta F4 (shock linkage mount is bolt on, under swingarm. linkage arrangement is similar to Ducati 916)
Length: 545
Pivot width: 255
Pivot diameter: 20
Eccentric outside diameter: 105
Eccentric width: 76
Wheel drive diamter: 85


90-93 VFR (shock linkage mount is two lobes on bottom of swingarm)(shock end is a 'fork')
Length: 565
Pivot width: 242 (+3.5 thrust collar)
Pivot diameter: 20
Eccentric outside diameter: 105
Eccentric width: 70 (+3 crenelated 'edge')
Caliper carrier diameter: 75
Caliper carrier width: 14
Brake rotor diameter: 255
Brake rotor mount diameter: 110
Sprocket mount diameter: 175
Wheel drive diameter: 100

94-97 VFR (shock linkage mount is one lobe on bottom of swingarm)(shock end is an 'eye')
Length: 560
Pivot width: 227 (+3.5 thrust collar)
Pivot diameter: 20
Eccentric outside diameter: 105
Eccentric width: 70 (+3 crenelated 'edge')
Caliper carrier diameter: 75
Caliper carrier width: 14
Brake rotor diameter: 255
Brake rotor mount diameter: 110
Sprocket mount diameter: 175
Wheel drive diameter: 100

Hawk (shock is direct-mounted to top of swingarm)(shock end is an 'eye')
Length: 545
Pivot width: 235
Pivot diameter (right): 15
Pivot diameter (left): <22
Eccentric outside diameter: 105
Eccentric width: 70 (+3 crenelated 'edge')
Caliper carrier diameter: 75
Caliper carrier width: 14
Brake rotor diameter: 240
Brake rotor mount diameter: 100
Sprocket mount diameter: 165
Wheel drive diameter: 100

RC30 (shock linkage mount is two lobes on bottom of swingarm)(shock end is a 'fork')
Length: 530
Pivot width: 235
Pivot diameter: 20
Eccentric outside diameter: 105
Eccentric width: 70 (+3 crenelated 'edge')
Caliper carrier diameter: 76
Caliper carrier width: 13
Brake rotor diameter: 220
Brake rotor mount diameter: 110
Sprocket mount diameter: 140
Wheel drive diameter: 85

RC45 (shock linkage mount is two lobes on bottom of swingarm)(shock end is a 'fork')
Length: 540
Pivot width: 250
Pivot diameter: 20
Eccentric outside diameter: 117
Eccentric width: 77 (+3 crenelated 'edge')
Caliper carrier diameter: 76
Caliper carrier width: 13
Brake rotor diameter: 220
Brake rotor mount diameter: 110
Sprocket mount diameter: 140
Wheel drive diameter: 85

RVF400 (shock linkage mount is two lobes on bottom of swingarm)(shock end is a 'fork')
Length: 540 (??)
Pivot width: 215
Pivot diameter: 20
Eccentric outside diameter: 105 (??)
Eccentric width: 60 (+3 crenelated 'edge')
Caliper carrier diameter: 76 (??)
Caliper carrier width: 15
Brake rotor diameter: 220
Brake rotor mount diameter: 110
Sprocket mount diameter: 140
Wheel drive diameter: 85

NSR250 / mc28
Wheel drive diameter: 85

MV Agusta F4 (shock linkage mount is bolt on, under swingarm. linkage arrangement is similar to Ducati 916)
Length: 545
Pivot width: 255
Pivot diameter: 20
Eccentric outside diameter: 105
Eccentric width: 76
Wheel drive diamter: 85

SINGLE SIDED SWINGARMS


Ducati 748/916/996/998 - 243mm
Honda VFR750 (1990-93) - 242mm
Honda VFR750 (1994-97) - 227mm
VFR400 - 192mm
RVR400 - 202mm
Hawk NT650 - 235mm
RC30 - 235mm
RC45 - 250mm
MV Agusta F4 - 255mm

[Suzukidave]

Are you going to run 2 shocks or mono shock ? as a aluminum box section GS1000 swingarm should fit in pretty nice but are a bit longer than a stock swingarm . http://www.ebay.com/itm/Suzuki-GSX1100- ... 68&vxp=mtr" onclick="window.open(this.href);return false;

[Weirdbeard1000]

If it helps, I just modded a TL1000r swingarm to fit my '73 GT750. I can't remember the pivot width off the top of my head right now but I had to remove 5mm +- to get it to fit. I can measure the gt swingarm tomorrow when I stop by my workshop after my 9-5.

[jeff kushner]

I do not have welding capability at home so I'm going to be forced to maintain the twin-shock setup. I've often been tempted to buy one of those welders from harbor freight but a friend bought one for 100 bucks or so and it didn't work worth a darn. I tried to tell him that if it plugs into 110V, 20A circuit it's not going to work. Maybe one day I'll break down and buy a decent 220 or gas welder but for now anyway, I'm forced to find workarounds.

Wierdbeard, I'd sure appreciate that but don't go out of your way in traffic-before-a-holiday-weekend. It can wait till next week but thanks for checking to give me the actual measurement!

SD, I haven't worked out the complete build plan details yet so I'm not sure what length I'm going to be shooting for but I don't think I'm going to want it longer. I've read a couple of dozen build threads it seems in the past couple of weeks and I'm trying to avoid some of the pitfalls others have had to deal with. That's why I gathered so many different bikes' info. Maybe I'll find a solution that's a near slip-in?!! I figure the chances of finding something that works better than stock yet doesn't take a frame rebuild are pretty good considering the sheer number of different swingarms built in the past 15 years or so. Even motocross S/A's aren't out of the question since many 250cc and up are built massively stronger than the stock GT S/A was....at least it appears that way.

jeff

[Suzukidave]

What i have seen so far swapping modern ends is the new GSXR front end will take off a couple of inches of the bikes length and then the swingarm adds a bit so most of the bikes come out a couple of inches longer than stock .

[jeff kushner]

Agreed, and lower which isn't all that great considering that there are 3 big pipes to allow for. I did find these puppies....

http://www.ebay.com/itm/291110251444?_t ... EBIDX%3AIT" onclick="window.open(this.href);return false;

which will allow me to take a boxed S/A and convert it to a shock-mount. I'm just trying to get all the options before I formulate my final plan. There sure is a ton of info out there to gather<LOL>!! It's easy, or easier to do a back-to-stock restore because there are no options, just get the right parts, restore the ones you can and go!

jeff

[pull the wire]

I come up with 226mm approximately on a 1975 chassis. I went with a 1978 GS1000 S/A. It is heavy but much stouter than the stock piece. The stock length is around 450mm and the GS 1000 is 535mm, of course depending on where the axle is adjusted to. Stock pivot shaft is 14mm, GS1000 is 16mm. I believe the larger pivot shaft and the heavier construction of the GS parts will take some of the Flexy out of the Flier. I just drilled and reamed my frame bosses for the larger pivot shaft and I have a decent rear disc set up from the GS donor. The sprocket alignment is perfect with the GS set up. The shock mounting on the GS S/A is a clevis style and to maintain the stock-ish ride height will require around a 13.5 - 345mm shock. The shocks lay down slightly for the cool look of early 70's motocross bikes. I like it cause it was cheap and easy. I don't have much cash so it works for me. Of course this is all mock up now. A couple more brackets and off to powder coat

[jeff kushner]

That's a pretty decent solution PTW and kudo's to you for finding a low cost way to make it work while definitely improving the rear end. Weight and length are my two biggest enemies at this point in my process...of course that may change in the next month or two it takes me to formulate my final plan. I really appreciate the time it took for you to post up because it lets me see different solutions that I hadn't thought of. I think that's the upside of being able to reach out and ask so many people what they think.

Have a great holiday guys,

jeff

[pull the wire]

Thanks Jeff

[Suzukidave]

The last picture in this topic is a very nice example of modern ends with a aluminum swingarm modded for twin shocks viewtopic.php?f=12&t=6960&p=133445#p133445" onclick="window.open(this.href);return false;

[jeff kushner]

Yes it is SD....and I've seen that bike before. A few of us from the Kaw triples board met up at Mid-Ohio last year and we saw this bike. It looks better in person and it is very well done.

jeff