zippets, what may be your preference for optimum gearing may not fit everyone here. With a 13T and the stock rear sprocket, you do need to keep an eye on the swingarm rubbing block up at the pivot location, as it is getting more frequent contact. Replacing the stock rubbing blocks and guides with aftermarket setups like Hotfootmoto or such pretty much eliminates this concern, however, as the material is nearly indestructible. I run a 13/47 on my '06 KLX, but that might not be the "best" for other users and their conditions.

 

I'm running a 45 rear now and 13, 14, or 15 CS. I have a 108 link on. I do not think a 106 will work for a 13/45.

I needed a 110 link with a 49 rear.

.

 

Check gearingcommander or the link below.

https://www.kawasakiforums.com/forum/showthread.php?p=496460#post496460


Would it make sense to add chain length data to the sheet?

 

Well this gearing thing is kind of confusing to me. Can some one tell me how a 13/47 setup differs from a 14/48, in terms of increased torque?

It would seem to me that one tooth less on the front with two additional teeth on the rear (13/47) would be somewhat analogous to a 14/48 setup, which is the stock front with three added teeth to the back. Just seems like the difference between the two setups is like splitting hairs, no?

 

Play with gearingcommander a little.
One smaller in front is about equal to three larger in back.

 

i have gone both ways 13/47 and 24/48 i went with 14/48 becuase of the added top speed i can go 55mph with the 14/48 with no problem

13/47 was around 45 but the biggest thing i noticed was the 13 was biting into my engine case some so 14/48 was the better option

 

trail blazer i have a 13/47 at my house if you want to try it out i dont think i'll be going to 13 teeth any time to soon

 

Stock ratio is 42/14 = 3.00 meaning the front sprocket rotates 3 revolutions for every one that the rear does.
48/14 = 3.43, or 14.3% gear reduction.
47/13 = 3.62, or 20.6% gear reduction.
6.3% difference between the two. That is actually quite a bit.
The 42/13 = 3.23, or 7.7% that is what most people use.



Was the sprocket biting the case or the chain? If the sprocket, then maybe it was the wrong one? I would say there are thousands of KLX’s out there with a 13 tooth sprocket. First I have heard of any problems.

 

o-ring chain it was apparently kawasaki did not do their stacks right to allow for the 13 tooth combo. since the chain does hit the case with a 13t chain

 

Where is it making contact on the engine case?