WHAT SIZE PITCH,CHAIN/SPROCKET FOR GSX750F AND CAN I GET MORE SPEED BY CHANGING NUMBER OF TEETH

most chain saw chain sprockets are either 1/4 or 3/8" pitch
in your case I would suspect it is 3/8 pitch
measure the distance between the link pins ( not the teeth but the pivot pins of the chain itself )
after that the sprocket will be available as a generic sprocket from any chain saw shop or mower shop
Talons went bust but are being reproduced under a new brand name ( ozito I think)

this indicates the sprocket teeth are worn and the pitch for the chain and the sprocket teeth are no longer compatible .or the chain is worn and stretched causing the same problem
check the teeth of the sprocket and if they look like triangles then replace the sprockets
they should look like small teeth that are fatter at the middle , ten slope off to the point

GSX 600F Katana 1989-1991
GSX 600F Katana 1989-1991
OEM Gear Ratio - 14T Front Sprocket / 46T Rear Sprocket OEM Chain - 530 Pitch / 112 Links

Top end engine rebuild. Sprocket size depends on the type of riding. Standard should be OK for motocross. If you need more top speed install a larger front sprocket and a smaller rear sprocket. Divide the rear sprocket teeth by the number of teeth on front sprocket e.g 48/14 = 3.43 a lower number means higher top speed 45/15 = 3.0 but compromised performance at lower speed. For tight forest riding and steep hills Rear 48 front 13 = 3.69 etc is preferable.

It has nothing to do with the number of teeth on either end, but the torque output of the engine. Take your old chain into your local bike shop and ask them for a complete set. This will make the chain last longer than if you just change the chain. Old teeth will damage the new chain.

1st. - NEVER change sprockets without changing the chain..and vice-versa!! - they need to be replaces as a set...they wear our almost equally.. ie - a worn out chain will wear out new sprockets... A new chain will get stretched out by worn sprockets real quick!
Its east to tell what you have...

• OEM sprocket size: 16/43 - 2.68 ratio.

1. Count the teeth on your front sprocket.
2. Count the teeth on your rear sprocket.
Compare yours with stock(OEM)..
Now, if your sprockets match the stock sizes - count the number of links in your chain...(count the inner links).
If the sprockets are different sizes you adjust the chain by that number using inner links. - Usually people go smaller on the front or a larger rear.. this increases the ratio to give a quicker take-off - (more acceleration).
15/43 = 2.86
15/44 = 2.93
15/45 = 3.00
15/46 = 3.06
..when you get a new chain... better to get one a couple links too long than one link too short!!
Your local dealer will be more than helpful!!

Hello, you will have quicker take off (bottom end) and lose top end speed, you will have the same effect if you increase the teeth on the back sprocket, if you want more top end speed do the opposite. You are changing your front sprocket from 15 teeth to 14 teeth which is going to turn the sprocket on the front quicker causing the rear wheel to go quicker, but because your engine is going to get to its maximum output quicker meaning you will lose a little on your top speed. Keep in mind if it is only your front sprocket being replaced (reduced in T) you may need to shorten your chain, it is recommended you replace front and rear sprockets along with your chain for maximum life on all 3 parts.

Remove the bar and chain and examine the sprocket teeth for excess wear or other damage. Make sure the chain 'pitch' (the distance between the drive teeth) matches the sprocket pitch. If the sprocket is badly damaged, the entire clutch should be replaced. Hope this helps!

According to www.searspartsdirect.com , this saw came with a 20" bar and a .325" pitch, .050" guage, 78 drive links chain.
On sears' website, plug in your model number, go to the handle section and your bar and chain are #130 and #131.
These items are also available aftermarket.
Oregon calls this a #33 or #20 chain, with 78 drive links.
Oregon offers a bar/chain combo part #106874

It is a good idea to inspect the drive teeth on the sprocket of the saw. If they are worn, this is the perfect time to replace the sprocket.

Good luck!

Call your local Power Equipment Dealers and ask if any of them deal with OREGON replacement parts.
OREGON makes clutch drum, chain and bar combinations in the thousands!
NOTE: Along with clutch drum and chain replacement, your bar will need to be changed also, as the sprocket-tip in the nose of the bar will be a different pitch.