Maintenance & Technical > KX500 Original
13 tooth front?
Good:
What do you guys think of a 13 tooth front sprocket for the dunes with a 48 rear? I tried to search, but am not literate at such things... :-P
I chewed all the teeth of my current on and am going to pick up another 14, but am thinking about getting a 13 to go with it. Too much? :?
Hillclimb#42:
What are you running on the back? There are some gear ratio charts on here somewhere. The front and back work together for a ratio. Also, 13 is gearing down from a 14, and probably not needed for sand riding. Something else that comes to mind is that you will most likely need to shorten your chain to run a 13.
I personally ride 13-47, or sometimes 13-49 for the trick riding. I use alot of second and third. I could gear taller then ride alot more 1st and 2nd. I think one tooth gained on the front is equal to losing three on the back. There is better range of adjustments from the back then obviously, and sometimes a tweak is better than a over haul.
FuriouSly:
Here is the link to the gearin chart;
http://www.kxriders.com/forums/index.php?page=12
3.00:1 is overall faster top end speed than 4.00:1
3.36:1 ratio (stock 14/47) gearing is more top end speed and less quick off the line. Good overal gearing for most conditions.
3.54:1 ratio (13/46) gearing means more bottom end quickness than stock with loss of overall top end speed. The smaller rear sprocket does not work as well in sand conditions since a larger sprocket will transfer the power better to a larger diameter paddle tire.
3.57:1 ratio (14/50) is lower gearing so less top speed yet more quick off the line. Another benefit of running a larger gear in the back is better torque usage to the rear wheel and ultimately to the ground.
I personally run a 14/50 (3.57:1) at the dunes. Gears close enough that you can start drag races in 2nd gear and finish pulling hills in 4th. Still gives you great top-end speed with 5th gear. I don't commonly run 5th (30% of the time) at the dunes since that gear is mostly flats or large distance, but when you need it... its there and into overdrive you go.
13 is a pretty small low end sprocket, mostly for very fast starts with less top-end. Also used in tight slow speed woods/trails.
Of course this is just my own opinion on the subject and I have no real mechanical or engneering degree in this area.... :lol:
Sly
Good:
Thanx for the link! I couldn't find it, though I knew it was here somewhere. I run the 48 rear and I was just wondering if the 13 front would be bad for the dunes to match it. I don't know if the 3.69:1 ratio is too much... I'm thinking I might go back to a 47 and run the 14 for desert and 13 for dunes. Just trying to keep it simple, and with more power than stock, the 47 might be OK.
Good:
Or maybe run the 15/14 fronts with a 51 rear... What about the 16/15 with a 54 tooth rear? Why don't guys run these combos? That 16/15 combo has a smaller variation in ratio than the others, and that's a HUGE rear for that drive gear power transfer to tire thing FuriouSly mentioned earlier. How much variation in chain would these be? Is there a chart for lengthening your chain?
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