

STAIN
Lifetime Member
- Joined
- Feb 29, 2004
- Messages
- 4,374
- Reaction score
- 3,635
- Points
- 1,713
- Location
- Vermont
- Country
- USA
- Snowmobile
- 2024 Arctic Cat Riot 9000
- LOCATION
- Vermont
Just wondering, with the information that Ulmer provided about a "soft rev limiter" at 9000 rpm , should we be shooting for an 8900 rpm target? I believe he indicated the ECU begins to pull away timing/ fuel at 9000 rpm before it hits the "hard" limiter at @9150
1049triple
Expert
- Joined
- Jan 19, 2009
- Messages
- 340
- Reaction score
- 87
- Points
- 888
- Location
- Pohenegamook, Qc
- Country
- Canada
- Snowmobile
- 2025 SRX
2018 High Country 9000
2001 SRX 700
Sorry Stingray but I never presented the stiffer spring as something new. I think every clutch kit already use stiffer springs than stock. Every different clutch set-up I use to run have had a way stiffer spring than the original 35-101.
I was telling people that the stock weight can be retained and loaded differently to achieve good speed numbers and rpms.
I was telling people that the stock weight can be retained and loaded differently to achieve good speed numbers and rpms.


- Joined
- Apr 13, 2003
- Messages
- 21,640
- Reaction score
- 9,264
- Points
- 2,103
- Location
- Schofield, WI
- Website
- www.totallyamaha.com
- Country
- USA
- Snowmobile
- 2020 Sidewinder SRX
Sorry Stingray but I never presented the stiffer spring as something new. I think every clutch kit already use stiffer springs than stock. Every different clutch set-up I use to run have had a way stiffer spring than the original 35-101.
I was telling people that the stock weight can be retained and loaded differently to achieve good speed numbers and rpms.
I agree with that...all the clutch info that's out there so far that I have seen achieves very similar top speeds. None of them are the perfect catch all speed maker.
Studroes144
TY 4 Stroke God
- Joined
- Oct 30, 2013
- Messages
- 2,897
- Reaction score
- 955
- Points
- 973
- Location
- Lowville, NY Tug hill snowmobiling
I agree with that...all the clutch info that's out there so far that I have seen achieves very similar top speeds. None of them are the perfect catch all speed maker.
That's where our good friend mr. Boost comes into play



- Joined
- Apr 13, 2003
- Messages
- 21,640
- Reaction score
- 9,264
- Points
- 2,103
- Location
- Schofield, WI
- Website
- www.totallyamaha.com
- Country
- USA
- Snowmobile
- 2020 Sidewinder SRX
That's where our good friend mr. Boost comes into play![]()
Right on

Studroes144
TY 4 Stroke God
- Joined
- Oct 30, 2013
- Messages
- 2,897
- Reaction score
- 955
- Points
- 973
- Location
- Lowville, NY Tug hill snowmobiling
I ride with a lot of guys on 800's who can hardly ever see 100 mph on a trail, in perfect conditions they're faster top speed than an average viper, but I have yet to see any sled pull consistent speeds in all conditions, no matter what brand it is, the only ones I'm seeing that will pull 100+ mph in any condition aside from deep powder are the turbo sleds, to get that kind of speed using all stock clutching parts and a spring swap is good, all depends on how u want your sled to perform


I ride with a lot of guys on 800's who can hardly ever see 100 mph on a trail, in perfect conditions they're faster top speed than an average viper, but I have yet to see any sled pull consistent speeds in all conditions, no matter what brand it is, the only ones I'm seeing that will pull 100+ mph in any condition aside from deep powder are the turbo sleds, to get that kind of speed using all stock clutching parts and a spring swap is good, all depends on how u want your sled to perform
Yes more power solves everything!
stingray719
TY 4 Stroke God
Sorry Stingray but I never presented the stiffer spring as something new. I think every clutch kit already use stiffer springs than stock. Every different clutch set-up I use to run have had a way stiffer spring than the original 35-101.
I was telling people that the stock weight can be retained and loaded differently to achieve good speed numbers and rpms.
Then I misunderstood and we agree....apoliges from me.
stingray719
TY 4 Stroke God
Just wondering, with the information that Ulmer provided about a "soft rev limiter" at 9000 rpm , should we be shooting for an 8900 rpm target? I believe he indicated the ECU begins to pull away timing/ fuel at 9000 rpm before it hits the "hard" limiter at @9150
Dyno and real world are not always the same. Every setup I have done on the Viper and everyone I know that has done in depth testing has said best numbers were achieved at 9100 or a little above.


Just wondering, with the information that Ulmer provided about a "soft rev limiter" at 9000 rpm , should we be shooting for an 8900 rpm target? I believe he indicated the ECU begins to pull away timing/ fuel at 9000 rpm before it hits the "hard" limiter at @9150
I would ask Ulmer but I would bet thats before the reflash. Hard rev limit is 9230 after flash.

- Joined
- Apr 14, 2003
- Messages
- 6,539
- Reaction score
- 3,171
- Points
- 1,983
- Location
- Hessel, Michigan
- Country
- USA
- Snowmobile
- Sidewinder, SR Viper XTX, SR Viper XTX, 2016 Apex XTX and Pro-Line Pro Stock 1000
1049triple - Awesome job bud!!! 
To all..... this is why all the guys testing and posting results here should be praised and thanked here......not questioned in dis-belief. It takes a lot of time to test out what works and what doesn't. Different conditions, sled mods, track lug height, fuel, suspesnion setup, Dupont slides or stock, temperature and the list goes on and on......I am and will be the first to say I yanked out the stock weights and never looked back because I gained so much more from other weights. I am happy to see 1049triple figure something out with the stock weights (as so did Excell) and I will be setting up my stock weights like he has to try on asphalt (can't hurt...right? I mean they are just sitting in my box not being used). Everyone has different opinions on clutching and what they like. I like very soft engagement, great pull, good fuel mileage, excellent off-trail performance and fast speeds on trail where it doesn't burn a belt, that's almost unheard of and of course not believed by many. This is where "we" as a group of intelligent men have gotten what was a Viper that was frowned upon by low top speeds to how "we" as a group helping each other get to those triple digits we love to see.
Don't know how to say this.....but it bothers me to see where someone comes up with something they like and get put down. Not saying that it's in this thread, but the overall general Viper clutching. Seems like all the evidence you provide, (videos, timeslips, pics, reported speeds, etc...) someone is going to headbut you to the point where you feel like you/I shouldn't have posted at all....
I want to thank everyone of you that has helped me with clutching and glad to have you all as close friends that we can share these setups and clutching issues with. As a person who has spent a lot of time clutching my Viper to where I have seen some incredible speeds over 110mph, I enjoy helping out others that want to make their sled perform better with clutching concerns or problems. There is nothing that makes me happier than someone that says "Thank you"

To all..... this is why all the guys testing and posting results here should be praised and thanked here......not questioned in dis-belief. It takes a lot of time to test out what works and what doesn't. Different conditions, sled mods, track lug height, fuel, suspesnion setup, Dupont slides or stock, temperature and the list goes on and on......I am and will be the first to say I yanked out the stock weights and never looked back because I gained so much more from other weights. I am happy to see 1049triple figure something out with the stock weights (as so did Excell) and I will be setting up my stock weights like he has to try on asphalt (can't hurt...right? I mean they are just sitting in my box not being used). Everyone has different opinions on clutching and what they like. I like very soft engagement, great pull, good fuel mileage, excellent off-trail performance and fast speeds on trail where it doesn't burn a belt, that's almost unheard of and of course not believed by many. This is where "we" as a group of intelligent men have gotten what was a Viper that was frowned upon by low top speeds to how "we" as a group helping each other get to those triple digits we love to see.
Don't know how to say this.....but it bothers me to see where someone comes up with something they like and get put down. Not saying that it's in this thread, but the overall general Viper clutching. Seems like all the evidence you provide, (videos, timeslips, pics, reported speeds, etc...) someone is going to headbut you to the point where you feel like you/I shouldn't have posted at all....
I want to thank everyone of you that has helped me with clutching and glad to have you all as close friends that we can share these setups and clutching issues with. As a person who has spent a lot of time clutching my Viper to where I have seen some incredible speeds over 110mph, I enjoy helping out others that want to make their sled perform better with clutching concerns or problems. There is nothing that makes me happier than someone that says "Thank you"


yamadoo
Yamadoo is a snowmobile ' aholic'.
- Joined
- Jun 3, 2003
- Messages
- 3,645
- Reaction score
- 1,501
- Points
- 1,753
- Country
- USA
- Snowmobile
- 15 Viper STX DX red/white- GPS and KING AIR suspension 4kmiles
13 Apex XTX 45 anniversary RED/WHITE/BLACK 3K miles
10 Vector LTX Blue 9kmiles
11 Venture GT 4k miles
86 SnoScoot(2) for grand kids
1049triple - Awesome job bud!!!
To all..... this is why all the guys testing and posting results here should be praised and thanked here......not questioned in dis-belief. It takes a lot of time to test out what works and what doesn't. Different conditions, sled mods, track lug height, fuel, suspesnion setup, Dupont slides or stock, temperature and the list goes on and on......I am and will be the first to say I yanked out the stock weights and never looked back because I gained so much more from other weights. I am happy to see 1049triple figure something out with the stock weights (as so did Excell) and I will be setting up my stock weights like he has to try on asphalt (can't hurt...right? I mean they are just sitting in my box not being used). Everyone has different opinions on clutching and what they like. I like very soft engagement, great pull, good fuel mileage, excellent off-trail performance and fast speeds on trail where it doesn't burn a belt, that's almost unheard of and of course not believed by many. This is where "we" as a group of intelligent men have gotten what was a Viper that was frowned upon by low top speeds to how "we" as a group helping each other get to those triple digits we love to see.
Don't know how to say this.....but it bothers me to see where someone comes up with something they like and get put down. Not saying that it's in this thread, but the overall general Viper clutching. Seems like all the evidence you provide, (videos, timeslips, pics, reported speeds, etc...) someone is going to headbut you to the point where you feel like you/I shouldn't have posted at all....
I want to thank everyone of you that has helped me with clutching and glad to have you all as close friends that we can share these setups and clutching issues with. As a person who has spent a lot of time clutching my Viper to where I have seen some incredible speeds over 110mph, I enjoy helping out others that want to make their sled perform better with clutching concerns or problems. There is nothing that makes me happier than someone that says "Thank you"
I agree completely. Why would anyone say any more than , " wow that is good or to bad or what ever, when I tried that I got this in these conditions ............." lets not jump on some one if their results are different, lets just figure it out, then we all benefit and learn.
I have never come up with a single performance idea but have benefitted from quite a few!!!!!! So THANKS
Similar threads
-
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.