sx7001
TY 4 Stroke Junkie
- Joined
- Jun 28, 2003
- Messages
- 693
- Country
- Canada
- Snowmobile
- Sidewinder
What RPM did you clutch it to. Spec in the manual is 10.000-10.750. Engagement 3.200-3.600. Mine is 3.200.
Larry
Larry
Alatalo
TY 4 Stroke Master
Srxspec said:The new Apex does have a stronger power curve than the old motor.
Compared to the old engine, how much more helix / weight does it pull...?
Not trying to figure out the spec of your clutch kit, just asking to get a reference compared to the old engine.
- Joined
- Apr 17, 2003
- Messages
- 5,347
- Location
- Menno, SD
- Website
- www.ulmerracing.com
- Country
- USA
- Snowmobile
- 2014 Yamaha SR Viper LTX, 2014 Yamaha SR Viper RTX SE, 2015 Yamaha SR Viper MTX SE 162 (turbo), 2015 Yamaha SR Viper MTX SE 153
- LOCATION
- Menno, SD
- WEBSITE
- www.ulmerracing.com
sx7001 said:What RPM did you clutch it to. Spec in the manual is 10.000-10.750. Engagement 3.200-3.600. Mine is 3.200.
Larry
10,400-10,500 seems to be the sweet spot with a stock intake and exhaust.
Alatalo said:Compared to the old engine, how much more helix / weight does it pull...?
Not trying to figure out the spec of your clutch kit, just asking to get a reference compared to the old engine.
It has more low/mid grunt to harness than the old engine. Comparing the clutching to an old Apex isn't a 100% equal comparison because you are comparing a 121 (old short track) to a 128 (new short track) and a 136 (old long track) to a 144 (new long track).
- Joined
- Apr 17, 2003
- Messages
- 5,347
- Location
- Menno, SD
- Website
- www.ulmerracing.com
- Country
- USA
- Snowmobile
- 2014 Yamaha SR Viper LTX, 2014 Yamaha SR Viper RTX SE, 2015 Yamaha SR Viper MTX SE 162 (turbo), 2015 Yamaha SR Viper MTX SE 153
- LOCATION
- Menno, SD
- WEBSITE
- www.ulmerracing.com
Come check out the 2011 Apex XTX that we'll have on display at Hay Days!
ogre
Extreme
My 2011 APEX SE IS HERE!!!!!!!!
Picking it up Saturday
Hopefully it is better then my old 05 RX1ER!!
Picking it up Saturday
Hopefully it is better then my old 05 RX1ER!!
rxrider
Jan-Ove Pedersen
- Joined
- Apr 25, 2003
- Messages
- 7,355
- Age
- 59
- Location
- Lakselv - 70N & 25E
- Country
- Norway
- Snowmobile
- 2014 Phazer XTX, 2013 Phazer RTX, 2008 Apex RTX, 2007 Warrior, 2006 Attak
cool ogre
TurboJamie
TY 4 Stroke God
Srxspec said:sx7001 said:What RPM did you clutch it to. Spec in the manual is 10.000-10.750. Engagement 3.200-3.600. Mine is 3.200.
Larry
10,400-10,500 seems to be the sweet spot with a stock intake and exhaust.
Alatalo said:Compared to the old engine, how much more helix / weight does it pull...?
Not trying to figure out the spec of your clutch kit, just asking to get a reference compared to the old engine.
It has more low/mid grunt to harness than the old engine. Comparing the clutching to an old Apex isn't a 100% equal comparison because you are comparing a 121 (old short track) to a 128 (new short track) and a 136 (old long track) to a 144 (new long track).
Are you able to share the stock pre 11' apex track hp curve to the 11' stock apex power curv and post it up?
- Joined
- Apr 17, 2003
- Messages
- 5,347
- Location
- Menno, SD
- Website
- www.ulmerracing.com
- Country
- USA
- Snowmobile
- 2014 Yamaha SR Viper LTX, 2014 Yamaha SR Viper RTX SE, 2015 Yamaha SR Viper MTX SE 162 (turbo), 2015 Yamaha SR Viper MTX SE 153
- LOCATION
- Menno, SD
- WEBSITE
- www.ulmerracing.com
This is of a 2007 Attak vs a 2011 Apex XTX (136 vs 144). The 2011 has quite a bit more all the way through.
Red = 2011 Apex XTX
Blue = 2007 Attak
Red = 2011 Apex XTX
Blue = 2007 Attak
rxrider
Jan-Ove Pedersen
- Joined
- Apr 25, 2003
- Messages
- 7,355
- Age
- 59
- Location
- Lakselv - 70N & 25E
- Country
- Norway
- Snowmobile
- 2014 Phazer XTX, 2013 Phazer RTX, 2008 Apex RTX, 2007 Warrior, 2006 Attak
It's catching up with the SRX 700, but just barely
NYRider
Veteran
Great looking sleds
- Joined
- Apr 17, 2003
- Messages
- 5,347
- Location
- Menno, SD
- Website
- www.ulmerracing.com
- Country
- USA
- Snowmobile
- 2014 Yamaha SR Viper LTX, 2014 Yamaha SR Viper RTX SE, 2015 Yamaha SR Viper MTX SE 162 (turbo), 2015 Yamaha SR Viper MTX SE 153
- LOCATION
- Menno, SD
- WEBSITE
- www.ulmerracing.com
Black 2011 Apex SE on the dyno now! Will try to post some pictures soon!
rxrider
Jan-Ove Pedersen
- Joined
- Apr 25, 2003
- Messages
- 7,355
- Age
- 59
- Location
- Lakselv - 70N & 25E
- Country
- Norway
- Snowmobile
- 2014 Phazer XTX, 2013 Phazer RTX, 2008 Apex RTX, 2007 Warrior, 2006 Attak
NYRider - welcome to the site, would you please fill in your location in your user profile, it's a site requirement.
rxrider
TY Management Team
rxrider
TY Management Team
rxrider
Jan-Ove Pedersen
- Joined
- Apr 25, 2003
- Messages
- 7,355
- Age
- 59
- Location
- Lakselv - 70N & 25E
- Country
- Norway
- Snowmobile
- 2014 Phazer XTX, 2013 Phazer RTX, 2008 Apex RTX, 2007 Warrior, 2006 Attak
Allen - I'm looking forward to the #s - thanks for taking your time making the dyno runs
sk-rx1
TY 4 Stroke Guru
Allen, Any updates on testing? Looking forward to numbers on a production sled.
- Joined
- Apr 17, 2003
- Messages
- 5,347
- Location
- Menno, SD
- Website
- www.ulmerracing.com
- Country
- USA
- Snowmobile
- 2014 Yamaha SR Viper LTX, 2014 Yamaha SR Viper RTX SE, 2015 Yamaha SR Viper MTX SE 162 (turbo), 2015 Yamaha SR Viper MTX SE 153
- LOCATION
- Menno, SD
- WEBSITE
- www.ulmerracing.com
2011 Apex Clutching & MOD Air Box graphs showed below!
2011 Apex SE Stock vs Ulmer Racing Clutch Kit
2011 Apex SE Stock vs Ulmer Racing Clutch Kit & MOD Air Box
2011 Apex SE Stock vs Ulmer Racing Clutch Kit
2011 Apex SE Stock vs Ulmer Racing Clutch Kit & MOD Air Box
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