14t Sprocket

[darb85]

Can anyone link me to a place to buy the 14t sprocket?  Ive seached but i cant seem to come up with a part number.  I already have the chain but not the sprocket. 

Link me to a buy it now kind of situation would be great!

Brad

[Ronin]

http://www.sprocketspecialists.com/ProductDetails.aspx?productID=15333     

[gsJack]

Dennis Kirk has one:

http://www.denniskirk.com/jsp/product_catalog/Product.jsp;jsessionid=JPSSQQ2YEPNQNLA0WTKSM4VMDK0NCIV0?store=&skuId=8098514

JT sprocket site:

http://www.jtsprockets.com/

[Kerry]

In my (5-year-old) experience, Sprocket Specialists only sells one sprocket model to cover ALL years.  I put one on my '99 shortly before a 3,000-mile trip, and had to listen to scary-sounding "clacking" a few times a day.  Later on, I figured out that their shoulder-less design should work fine on '89-'93 models, but that '94-'00 (and possibly beyond) came with a "shoulder" cast into the sprocket.  (See [THIS RECENT POST].)  If the SS sprockets are just too cheap to pass up, you could probably add a washer or two in lieu of the shoulder.

My [Chains & Sprockets] page is a couple years old, but most of the part numbers are probably still good.  Gotta update that page one of these days....

[gsJack]

Also Chaparral:

http://www.chaparral-racing.com/Chaparral/product_family.asp?family%5Fid=16780&gift=False&mscssid=007D8E34F9BAA47D89EA8F8345DD9B62

The JT516 sprockets have the hub.

[darb85]

Thanks Kerry.  Ill go with the JT sproket from Kirk. It says it fits 94-00 so it should have the sholder right kerry?

Dont need a klickity clack sound, thats scary

[darb85]

Kirk Kills Chaperall with shipping.  for total price wise.

[Kerry]

Yep, it should have the shoulder/hub/spacer built-in.  

[darb85]

Bought and done!

Thanks all!

[gsJack]

In my (5-year-old) experience, Sprocket Specialists only sells one sprocket model to cover ALL years.  I put one on my '99 shortly before a 3,000-mile trip, and had to listen to scary-sounding "clacking" a few times a day.  Later on, I figured out that their shoulder-less design should work fine on '89-'93 models, but that '94-'00 (and possibly beyond) came with a "shoulder" cast into the sprocket.  (See [THIS RECENT POST].)  If the SS sprockets are just too cheap to pass up, you could probably add a washer or two in lieu of the shoulder.

My [Chains & Sprockets] page is a couple years old, but most of the part numbers are probably still good.  Gotta update that page one of these days....

The front sprocket for the GS with the hub is the JT516.  Your links show a JT512?

I used those Sprocket Specialists sprockets without hub on both my 97 and 02 GSs for tens of thousands of miles without the clicky clack.  But Chaparral has the JT now so I'll just get the right one with hub with my next chain.  Hope it doesn't spoil my bike, it's not used to the best of everything.   

[Kerry]

The front sprocket for the GS with the hub is the JT516.  Your links show a JT512?

Cool - from the drawings on the JT website, the hub on the 516 series appears to have a diameter closer to the stock sprocket.  I can't remember how I stumbled on the 512 series years ago - probably either a cross reference from a non-JT catalog, or a GStwin post, or a "lucky" guess.

When I update the page I'll be sure to shill the 516 series of sprockets instead of the 512 series. 

darb85, no reason to panic if you ordered the 512 series.  It will be slightly heavier, but it will work fine. 

[darb85]

I got the one that Kirk had.  Says it will work and complete refund if it doesnt.  Hevier aint nessesarily a bad thing.

108 chain is what i need right?

[darb85]

or is it a 110.  damn it now i have to find the thing....  pretty sure its the right piece.  went down two links from stock... so what ever that is

[Kerry]

The stock chain has 110 links.  You dropped 2 teeth on your front sprocket, but that doesn't translate directly to a 108-link chain, because it reduced the sprocket circumference by 2 tooth widths, not the diameter.  The change in diameter would be more closely related to the amount that the rear wheel has to move back to restore normal tension for the chain.  If I'm doing my math right, that amount would be around 1.3 links worth.

If you're getting a brand-new chain, I would probably get a regular 110-link unit.  Maybe, as the chain "stretches" (wears down) and the rear axle gets close to the end of its adjustability, you could remove 2 links?

Even better, wait for someone who has actually mounted a 14-tooth chain to weigh in.... 

[Jenya]

What was changed from '93 to '94 models in regards to requiring a different front sproket?

Jenya

[spc]

I had a 14t on my GS and the 110 link worked like a charm.

[Kerry]

What was changed from '93 to '94 models in regards to requiring a different front sproket?

Thanks for asking; it made me look more closely through the [Parts Fiches]. 

The only thing I can see (under the TRANSMISSION category) is that spacer #37 got shorter.  It apparently went from 35.6mm in length to 32.7mm ... a reduction of almost 3mm.  That would have moved the sprocket closer to the engine, and introduced a small misalignment with the rear sprocket.  I never measured the shoulder/hub/spacer on my stock '99 sprocket, but I wouldn't be surprised if it's about 3mm wide. 

[gsJack]

I think the change was made to add the hub because they wanted more engagement between the sprocket and shaft spline. 

The JTF516 sprocket with hub is 8.8 mm wide and the 520 chain is 1/4" wide between plates so the tooth part of the sprocket or a sprocket w/o hub would be about 6 mm wide allowing for chain clearance.  That's about 2.8 mm approx the same as the spacer difference.

If a sprocket w/o hub is run on the 94 and later GSs, there is no misalignment between sprockets if there is no wheel misalignment.  The front sprocket is located by the rear thru the running chain and rides right up against the snap ring leaving the extra clearance behind it.  Honest, it was right there everytime I looked.  There is just less sprocket/spline engagement.

Got a whole pile of those sprockets over in the garage, I'll bring one of each back when I put the bike away later.  (if I remember)

[gsJack]

Measured a OEM Suzuki 16T front sprocket with hub:

.346" (8.8mm) o/a wide - .232" (5.9mm) tooth width = .114" (2.9mm) hub width which is exactly equal to the spacer #37 length change.  Splined driveshaft has same part # from 89 thru 02.

Sprocket Specialists 504 16T sprocket measured same .232" wide and is of significantly lower quality than the OEM sprocket.

Both sprockets weighed same 210 grams on wife's Weight Watchers scale which is marked in 10 gram increments.

[Kerry]

Thanks gsJack - it's always nice to have empirical data!