AF sprockets

[eyesky2002]

Getting ready to buy sprokets for my 03 CRF450 conversion, mostly ride small to mid sized MX tracks and tight trails. What would be a good tooth combination to start with?

[100hp honda]

sunstar steel front- ironman rear- RK x:ring chain (exw model). its expensive combination but strong as hell

[AlisoBob]

The only way to go.....

http://www.dirttricks.com/ordering_sprockets.htm

$199 for dual Ironman Sprockets + Regina 0-Ring chain.






Add the bolt for $9 , and your set for years.....

This is really good stuff.

I would go something like 13 x 48

[nmdesertrider]

my cheapo primary drive stuff is holding up

[quantum500]

my cheapo primary drive stuff is holding up

X2 Anybody done the math to figure out how many sets of primary drive and a big role of wholesale chain equals to the "premium" stuff?

Here is a start http://www.surpluscenter.com/item.asp?U ... H&catname=

[iggys-amsoil]

14/51 is good for tracks. Then use a 13 for tight woods. Its a 116 links instead of 114.

[teemtrubble]

I agree with Bob except I run a 14-48

[eyesky2002]

13-48
14-48
14-51

Can someone explain the difference in these combos to me? I get that the change from the 48 to the 51 would lower my gear making me quicker with less lop speed. But what does dropping to the 13 do?

About ready to order my set and once you push the button it's yours, so I want what is right.

[MojoScojo]

13:52 = .250 <--- what I run in the woods for crawling through the slow stuff. Very high wheelie power.

13:51 = .255
13:50 = .260
13:49 = .265
14:52 = .269
13:48 = .271
14:51 = .275
14:49 = .286 <--- stock gearing
14:48 = .292 <--- higher top speed, less wheelie power.

If you can get to the gear range you want using a larger countershaft sprocket, do it. It will last longer. The chain has to flex more with a smaller countershaft sprocket to make it around the smaller diameter and torque becomes more focused fewer links. This translates to faster wear.

[AlisoBob]

Ratios are more commonly expressed the other way round'.....

14x48 would be "3.42" as an example.
13x51 = "3.92"

[MojoScojo]

Sorry.

I'm a programmer, not a mechanic.

[AlisoBob]

You da' Man!

[teemtrubble]

Simply take the number of teeth on the rear sprocket and divide it by the number of teeth on the counter shaft equals the ratio.

48 divided by 14 eqauls 3.4285714 = 3.43 ratio

Higher Ratio Sprockets ( Lower Number) the more top end or top speed.

Lower Ratio Sprockets ( Higher Number) the more bottom end or more snappy, quicker.

[iggys-amsoil]

Yeah I give up 6 mph from the stock 14/49 to 14/51, but lowering the gearing a bit helps to stay in a taller gear through corners.