blueironranger
TY 4 Stroke God
- Joined
- Feb 3, 2009
- Messages
- 2,002
- Reaction score
- 499
- Points
- 1,203
- Location
- Iron Range MN
- Country
- USA
- Snowmobile
- 2014 Viper XTX
2009 Phazer MTX
Mine currently has the factory 17 tooth gear in it, with flatlander clutching specs (13.3 steels in both holes). I took it out to the lake to finish up the break in miles and was riding on about 3" of power on top of ice. Here is an comparison of SPEEDO vs GPS.
33mph = 30mph GPS
55mph = 50mph GPS
79mph = 70mph GPS which is the speed my clutches were full shifted and the Tach started to climb above 11500rpm.
83mph = 73mph GPS which is where the Engine climbed to 12,000 so I let off.
One thing I noticed was that the sled pulled quite well up to 70mph on the speedo and continued the march to 79mph where the clutches were shifted out. It Didn't seem to like having the clutches shifted out and it hit a wall where it struggled to climb any higher. At the 79mph mark I could actually back off the throttle quite a bit and maintain that speed. I have a 19 tooth upper gear that I will be changing to when I do the 500 mile oil change/filter change and will be testing out also. Since I'm more of a Crossover type person I think the 19 tooth gear will work out better for me. The 19 tooth gear is within 1% of what a 17 tooth gear on a short track Phazer would be for power/speed. Running the numbers with a calculator Each jump in tooth will add ~4mph to the theoretical top speed.
33mph = 30mph GPS
55mph = 50mph GPS
79mph = 70mph GPS which is the speed my clutches were full shifted and the Tach started to climb above 11500rpm.
83mph = 73mph GPS which is where the Engine climbed to 12,000 so I let off.
One thing I noticed was that the sled pulled quite well up to 70mph on the speedo and continued the march to 79mph where the clutches were shifted out. It Didn't seem to like having the clutches shifted out and it hit a wall where it struggled to climb any higher. At the 79mph mark I could actually back off the throttle quite a bit and maintain that speed. I have a 19 tooth upper gear that I will be changing to when I do the 500 mile oil change/filter change and will be testing out also. Since I'm more of a Crossover type person I think the 19 tooth gear will work out better for me. The 19 tooth gear is within 1% of what a 17 tooth gear on a short track Phazer would be for power/speed. Running the numbers with a calculator Each jump in tooth will add ~4mph to the theoretical top speed.
woolyviper
TY 4 Stroke Master
- Joined
- Mar 24, 2006
- Messages
- 1,151
- Reaction score
- 2
- Points
- 841
- Location
- hibbing,mn
- Country
- USA
- Snowmobile
- 2009 Yamaha Phazer RTX
i've got fx gears and chain if interested.
blueironranger
TY 4 Stroke God
- Joined
- Feb 3, 2009
- Messages
- 2,002
- Reaction score
- 499
- Points
- 1,203
- Location
- Iron Range MN
- Country
- USA
- Snowmobile
- 2014 Viper XTX
2009 Phazer MTX
I may be interested in that 18 tooth gear if mine won't pull the 19 tooth all the way to shift out. I may have a 17 tooth available to get rid of too! Seems like the stock chain is good for 17 through 20 tooth gears as they all share the same bottom gear and chain part numbers (GT, FX, RTX, MTX). I know 70mph isn't going to quite cut it for me. A 18 tooth would get me to 74mph and a 19 tooth to 78mph at full shift out. I'm also hoping they pull my RPM's down a bit too, Its pulling 11,500-11,600 all the way up right now.
woolyviper
TY 4 Stroke Master
- Joined
- Mar 24, 2006
- Messages
- 1,151
- Reaction score
- 2
- Points
- 841
- Location
- hibbing,mn
- Country
- USA
- Snowmobile
- 2009 Yamaha Phazer RTX
after about 1500 miles your sled will pull 11,800.
looks like we're going to get a chance to ride finally.
looks like we're going to get a chance to ride finally.
