Spocket and chain

[Mxzdan]

I need to change my chain so I decided that I might also change my front and back sprocket.

 

I like to ride the trail's mx track and some time I like to drag with my buddy's

it is hard to do whelly's cause it spin's to much

 

So what should I do.

 

what gearing should i use

the stock 14,41 with the 520-104 or something else

 

thanks

Edited April 10, 2005 by Mxzdan

[mxbanshee]

Hey man, I'll give ya my 2 cents...

First off, I't's a GREAT idea to change your sprockets when you replace your chain. See, chains stretch, and lots. A couple of ways to tell when you need to replace your chain are as follow: Pull one chain link off of your back sprocket, if you can see more than 1/2 the sprocket tooth, replace. Another is to take the chain off and measure it. The distance between 21 pins (when pulled tight) should not ecxeed 327mm or 12.75inches.

So, it your going to replace your chain, replace your sprockets. If you wouldn't, the new chain would be damaged by the worn sprockets.

O.K., now about gear ratio's. Banshee's are always going to spin the rears. One way to drastically reduce this is to go with a shorter swing arm. I know this is a costly fix and may not be what you intend to do, but if your serious about mega traction on a MX track, this is for you.

You said that you like to play on an MX track, and drag race your buddies. Sorry to tell ya that you can't do both at optimum performance. To drag your buddies, and kick their ass, you need tall gearing (I'll explain in a min) and large rear tires (20,21,22). Now for MX you want the exact opposite. You want a "shorter" gear with small rears (18 or 19). I'm set up for MX, my budies smoke me when we opened them up on a long straight, but I really could care less cuz they don't stand a chance with me on the track.

You have to decide where you want to be. The good news is that there is an in-between that will perform O.K in both.

Here are some things to remember:

Larger front sprocket = more top speed, less acceleration

Smaller front sprocket = more acceleration, less top speed

Larger rear sprocket = more acceleration, less top speed

Smaller rear sprocket = less acceleration, more top speed

Taller rear tire = more top speed, less acceleration

Shorter rear tire = more acceleration, less top speed

1" @ the rear tire roughly translates to 2 teeth on the rear sprocket.

2-3 teeth on the rear sprocket roughly translates to 1 tooth on the front sprocket

"Taller" ratios mean more top speed, less acceleration, smaller numerically.

"Shorter" ratios mean less top speed, more acceleration, larger numerically.

The stock 14, 41, gear ratio is 2.93. if you want a taller gear ratio go down in the number, to a 2.86. O.K. these gear ratios are comming from a chart you can find here:

Gear ratio

Now to be honest with ya, Yamaha pays big bucks to their engineers for a reason. Using the stock 2.93 is a pretty good happy medium for your kind of ridding. There are many other factors here such as susspension set up, weight of the rider, and tires again. You would be amazed at the difference a tire change can make. Like I said, 1inch at the rear tire equals 2 teeth on the rear sprocket so take this into account when looking at the gear ratio chart.

Now about the wheelies. A Banshee with stock gearing WILL wheelie. My opinion is that you need some new rubber.

Good Luck!

Edited April 10, 2005 by mxbanshee

[Mxzdan]

Ok thanks

I got dominator 21 inch tire

and It whellies but only if the ground is hard if it's not

it spin's way to much