I HAVE A 05 RAP 350 AND WANT TO GET RID OF THE 12 TOOTH FRONT AN GO BACK TO THE 13 THE 12 IS VERRY LOUD SEEMS LIKE IT BINDS THE CHAIN THE 13 DOESNT MAKE THIS SOUND. SO MY QUESTION IS WILL A WARRIOR OR BANSHEE REAR SPROCKETS FIT MINE THE REASON I DONT GET ONE FORMINE IS THE BIGGEST I CAN GET IS A 40 I WANT A 42 MAYBE A 44 SO WHAT DO YALL THINK? AND HOW MANY TEETH WILL I HAVE TO GO UP ON THE REAR TO EQUAL A 12 TOOTH FRONT? ANY HELP WOULD BE GREAT--JEREMY

 

I can help you with the math but not the banshee/warrior sprocket ???'s

If you go up 1 tooth from a 12 to 13 tooth you will have increased the size by 1/12 or .0833.

That's 8.33%. To find the amount of increase on the rear in teeth . Multiply your rear by .0833.

Let's say you have a 38 tooth rear. Multipluy 38 x .0833 and you get 3.165, That your increase
for the ratio to match again. You'll need to round it off in the direction that suits your needs or
what's available.

Hope this helps. $.03

 

A very simple rule of thumb for sprocket changes is one tooth in front = three teeth in rear..
No, its not exact. but it works for the average rider..