This site has a great chart for the Yammie 500. It shows the XT/TT, and I'm not sure, but I think the internal ratios for the SR tranny may be different. You could probably find that out from one of the thumper sites, or ask Mark at www.thumperstuff.com
But the top section of the chart will give you a good comparison of final drive ratios. I think Sprocket Specialists has a similar chart.
http://www.members.aol.com/rotaxjohn/websprocket.html
How much low speed acceleration do you anticipate? I like to keep a lower number on the front for better accel off the turns. Of course I only have to setup for one gear, but still, I would think you could go down to a 16, maybe even a 15 front, then find the right rear sprocket to get you into fifth halfway down the straight. Particularly if you can get onto the straight in 2nd...
Your engine has enough torque that once you leave the line you don't need 1st gear anymore.
FR
Edited by - FR on May 03 2007 3:10:40 PM
But the top section of the chart will give you a good comparison of final drive ratios. I think Sprocket Specialists has a similar chart.
http://www.members.aol.com/rotaxjohn/websprocket.html
How much low speed acceleration do you anticipate? I like to keep a lower number on the front for better accel off the turns. Of course I only have to setup for one gear, but still, I would think you could go down to a 16, maybe even a 15 front, then find the right rear sprocket to get you into fifth halfway down the straight. Particularly if you can get onto the straight in 2nd...
Your engine has enough torque that once you leave the line you don't need 1st gear anymore.
FR
Edited by - FR on May 03 2007 3:10:40 PM
