520 Sprocket to fit GS sprocket carrier

[salty_monk]

I use a 520 set on the 750 for added tyre clearance. I currently run a 16 x 42 & am thinking of going up a little on the rear to give low down torque. I would rather go up on the rear than down on the front as

Can anyone tell me what bike has a 520 chain & the same 100mm PCD 6 bolt fixing (inner hole dia 76mm) same as the GS?

Would I be looking at an older GSXR maybe? Katana?

The set I have now came from Z1 but I asked them about other size availability without much success so far so thought I'd start some research of my own.

The JT catalogue is pretty good but I just need some hints on the right search terms... http://www.jtsprockets.com/52.0.html

I ran the 16/42 as I also have the 5.5" rear wheel with 170 tyre but I think the gearing is a little high (certainly higher than stock as when I was running with a completely stock bike this summer I had longer range than him even though I am running a Stage 3 DJ kit, pipe, pods etc).

I am thinking of trying a 44 or 45 tooth rear next.

Dan

 

[sschering]

Vortex 525A 520 conversion rear sprocket
90-95 GSXR750
97-2002 GSF1200 Bandit

AFAM also make a 520 conversion sprocket for those bikes.

I couldn't find anything US Spec that came stock with a 520 that will fit a GS.. The UK DR750 had a 520 that will fit..

All these bikes came with a 530 with 100mm PCD and 76mm ID so a 520 conversion for one of them should fit

Best bets I'd say are the GSXR 750, GSXR1100, GSF1200 and the RF900R

• 1983 Suzuki GR650 Tempter
• 1983 Suzuki GR650X Tempter
• 1982 Suzuki GS1000S Katana
• 1983 Suzuki GS1100ES
• 1984 Suzuki GS1150ES
• 1985 Suzuki GS1150ES
• 1986 Suzuki GS1150ES
• 1978 Suzuki GS550E
• 1979 Suzuki GS550E
• 1980 Suzuki GS550E
• 1983 Suzuki GS550E
• 1985 Suzuki GS550E
• 1983 Suzuki GS550ES
• 1984 Suzuki GS550ES
• 1985 Suzuki GS550ES
• 1986 Suzuki GS550ES
• 1979 Suzuki GS550L
• 1980 Suzuki GS550L
• 1981 Suzuki GS550L
• 1985 Suzuki GS550L
• 1986 Suzuki GS550L
• 1982 Suzuki GS550M Katana
• 1981 Suzuki GS550T
• 1981 Suzuki GS650E
• 1982 Suzuki GS650E
• 1985 Suzuki GS700E
• 1985 Suzuki GS700ES
• 1983 Suzuki GS750ES
• 1979 Suzuki GS750L
• 1982 Suzuki GS750T
• 1983 Suzuki GS750T
• 2001 Suzuki GSF1200 Bandit
• 2002 Suzuki GSF1200 Bandit
• 2003 Suzuki GSF1200 Bandit
• 1997 Suzuki GSF1200SA Bandit
• 1997 Suzuki GSF1200S Bandit
• 1998 Suzuki GSF1200S Bandit
• 1999 Suzuki GSF1200S Bandit
• 2000 Suzuki GSF1200S Bandit
• 2001 Suzuki GSF1200S Bandit
• 2002 Suzuki GSF1200S Bandit
• 2003 Suzuki GSF1200S Bandit
• 2004 Suzuki GSF1200S Bandit
• 2005 Suzuki GSF1200S Bandit
• 1995 Suzuki GSX-R1100W
• 1996 Suzuki GSX-R1100W
• 1997 Suzuki GSX-R1100W
• 1998 Suzuki GSX-R1100W
• 1990 Suzuki GSX-R750
• 1991 Suzuki GSX-R750
• 1992 Suzuki GSX-R750
• 1993 Suzuki GSX-R750W
• 1994 Suzuki GSX-R750W
• 1995 Suzuki GSX-R750W
• 1972 Suzuki GT750 LeMans
• 1973 Suzuki GT750 LeMans
• 1974 Suzuki GT750 LeMans
• 1975 Suzuki GT750 LeMans
• 1976 Suzuki GT750 LeMans
• 1977 Suzuki GT750 LeMans
• 1994 Suzuki RF900R
• 1995 Suzuki RF900R
• 1996 Suzuki RF900R
• 1997 Suzuki RF900R

 

[sschering]

OK got a stock one..

JT Sprockets JTR1825

Fits 80-82 Suzuki GN400

also used on
85-86 LT250E Quads
87-89 LT300 Quad
87-90 LT500R Quad

 

[rapidray]

Dan, if you give Sprocket Specialists a call, they should be able to answer your question. Their # is 800-782-8200. Ray.

 

[jwhelan65]

Dan , I used a 48t 520 Supersprox that fit a 98 Bandit 1200.

GS Hub powder coated black

 

[salty_monk]

Thanks guys. Gives me some ideas to work from.
Thanks for the number Ray.

 

[salty_monk]

Anybody know how much additional diameter +1 tooth adds to a rear sprocket?

Trying to work out how much further forward the wheel has to be for a +3 teeth with same length chain.

Looks like I'm running a 2.60 as opposed to a stock 3.07. With the Tyre height being 102mm instead of the stock 108mm prob explains why I think it's a bit slow off the mark!

 

[salty_monk]

Got this from a post on ADV rider:

A lot of people get confused about how much the rear axle will move with different sprockets on there. It's easy enough to figure out. The distance between the pins of one chain link is 5/8 of an inch. Adding one tooth on either sprocket moves the rear axle forward by 1/4 of that or 5/32". Going one tooth less moves the rear axle back by 5/32".

Would work for a 520,525 or 530 chain. Is it correct though?? That's 4mm for each extra tooth which seems like a lot to me

 

[salty_monk]

This from ThumperTalk... looks promising:

The two rules of thumb:

+/- 1 sprocket tooth = +/- 5/32" change in distance between axles

+/- 2 chain links = +/- 5/8" change in distance between axles

applied to your other bikes will get you in the ballpark. There's about 0.3mm average error in the "1 tooth = 5/32" one, which means you may have to tweak chain slack adjustment, but is accurate enough for anything else.

 

[nufnuf]

520 sprockets

520 sprockets

I use a "JTF511F -sprk kw 520"
Its a 15 t front
and a "32 - 374- 48"
48 t rear (for a DR750 sj/suj)
`I would like a 16 and 17t front as options for different gearing

 

[sschering]

I use a "JTF511F -sprk kw 520"
Its a 15 t front
and a "32 - 374- 48"
48 t rear (for a DR750 sj/suj)
`I would like a 16 and 17t front as options for different gearing

Use the RF900 520 conversion sprocket
JTF512 It comes in 14-17 teeth

RF900 matches the GS1000/1100 sprocket mounting dimensions front and rear


GS1000 stock 630 set

RF900 (520 conversion)

 

[salty_monk]

I have a 16t jt sprockets 520 front brand new if you want it. I used a PBI one in the end as it had extra thickness in the middle which was useful for me.

Not sure what I am going to end up at. Might try the 45 or 46 rear and then if still want lower go for the 15 front but I think it should be ok.

Dan

 

[salty_monk]

If I go with a 45t rear & ultimately end up going with a 15f instead of the 16 am I going to have issues?
I read something that said having multiples (i.e. 3 x 15 = 45) is not a good idea as it accelerates wear & can increase vibration.

 

[salty_monk]

Use the RF900 520 conversion sprocket
JTF512 It comes in 14-17 teeth

RF900 matches the GS1000/1100 sprocket mounting dimensions front and rear


GS1000 stock 630 set

RF900 (520 conversion)

Good info here... thanks!

I also found out the 81-83 DR500 is the same sprocket in a 520 too.

 

[Chuck78]

Posting for reference here, & to keep this old thread's wealth of knowledge alive.

I was running 3.50x18 rear rims and 140/70-18 rear tires, but when I bought a set of Sun rim GS1000 wheels that had the more expensive less common 150/70-18 rear tire, I found my preference leaning towards the more appropriate looking meatiness of the 150/70 (taller tire), which makes my chain on the GS750 very close.
On the flipside, the 140/70-18 is lighter and has a shorter sidewall height, so it will rob less hp and corner with less flex, as well as grip about the same as a 150 installed on a 3.50 (vs a 4.00x18).

I'll also be putting a 140/70-18 on a GS425 489cc with a narrowed GS1100E swingarm. The narrower engine with GS1000/750 rear wheel will require a narrower chain and maybe a GS550 sprocket carrier as well as some offsetting of front sprockets. This is where it gets tricky for me, 520 conversion front in an offset sprocket. Sounds like a call to Sprocket Specialists unless anyone can point me in the right direction. I'll have to compare the GS425 output shaft splines vs my spare 750 engines to see if it's that simple.

I've been running a SuperSprox Stealth 530 48t rear which I LOVE, aluminum center steel outer teeth ring. Vortex 17t front, loved the drilled holes in it to lighten it.if only I could get those in offsets...

SuperSprox will make the Stealth in any custom configuration, even cut your own designs into the aluminum center!

 

[Chuck78]

No luck for me on ebay finding any Bandit 520 conversion offset sprockets!
A search for offset sprockets did reveal that a GS1000 & GS1100E use a countershaft (output shaft) sprocket with a 25mm diameter 13 spline count. From ebay:

"MOST COMMON APPLICATIONS WOULD INCLUDE KZ1000, GS1100, KZ900, GS1000, GSX1300R busa + GSXR1000 Gen 1 (1999-2007) MODELS OR ANY OTHER APPLICATION HAVING THE 25mm DIAMETER , 13 SPLINE OUTPUT SHAFT"

 

[Fjbj40]

Just machine the 530 sprocket to 520 dimension. I discussed this with a sprocket manufacturer and that is what they told me to do. The hardness treating is only on the face of the teeth, not the sides.

 

[Chuck78]

I Google searched the forum to dig up some more info. I'll lump it along here for reference:

Apparently Kosman makes a few sizes in offset 520 sprockets for our bikes.
Katman on this forum has also sold a few to members:
"I purchased my 520 c/s from Randy at Advanced Precision and I'm 100% satisfied with their product. Thanks to 80GS1000 for the contact info that was in his project thread.

(Advanced Precision is also the shop that mfg's the sprockets retailed by the "katman" at his website.)

NorCalSuperF"

"Randy at Advanced Precision in Oregon did my 520 offset front sprocket. Very high quality for $60. http://www.manta.com/company/mm8q7fn" -(in the year 2009)

"Randy Boyd

Advanced Precision Products

87906 Bill Creek Ln
Bandon, OR 97411-9165

Phone: (541) 347-7262"

& as Ray endorses, Sprocket Specialists.

 

[Chuck78]

Another thing I think from Dan Salty_Monk:

"also have the option of buying the DID ERV3 Chain which will gain me 0.75mm each side.
Currently I have choice of 2 chains - RK X ring (20mm wide at the pins) or RK XW ring which is 21mm wide at the pins"

The more clearance on this wide tire narrow engine narrow frame build, the better... this saved me from a bit of researching the narrowest strong 520 o-ring chain.

 

[Fjbj40]

Randy is who I got the info from, this is from his reply



hello Daryl

Rob Wilton has that sprocket but in 530 if you have a lathe or a machine shop you can purchase one from him chuck it up in a lathe and take .115 off the outside to just below the root of the tooth so the chain would wrap and you would have a 520. The pitch is the same and since the chain doesnt contact there it would not be an issue with wear from the case hardening being removed. If you want us to build one it could be a month to 6 weeks easily , we have to send them to case hardening so i hate to give an exact time frame.hope this helps.

Randy