
KnappAttack
24X ISR World Drag Racing Champion
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- 2023 Sidewinder LTX-LE
2017 Sidewinder LTX-LE
Nice mid summer read while we wait for winter to ride our trail rockets.
http://www.snowmobile.com/manufacturer/yamaha/2018-yamaha-sidewinder-l-tx-le-50th-anniversary-review
http://www.snowmobile.com/manufacturer/yamaha/2018-yamaha-sidewinder-l-tx-le-50th-anniversary-review
XP123
TY 4 Stroke Master
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- Dec 25, 2016
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- Chautauqua NY
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- USA
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- Sidewinder XTX LE 137
I've had many sleds over the years and none of them ever got me as excited as my Sidewinder has. I've owned nothing but Ski Doo 1200's since 2009 and even though I liked all of them I never really looked forward to riding them the following Winter. That has all changed and now for the first time in many many years I'm looking forward to riding my sled next Winter.
Finesy
Expert
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- Apr 18, 2017
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- Manitouwadge
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- Canada
- Snowmobile
- 2018 Sidewinder RTX 50th Anniversary
2017 Sidewinder LTX SE
Mine is still sitting in the crate at the dealership. I've been impatiently waiting for his call to come and get it.
I struggled with the decision between the 129 and the 137, finally decided on the 129 because I believe it will handle the tight twisty trails a lot better. I had a 17 Renegade 850 and felt the 137 inch track restricted performance in some areas.
Bassett seems to be quite set on a 137 in his article on the 18 Sidewinder. I hope I'm happy with my decision on the 129. I know I'll be happy moving up to the Sidewinder. And I will definitely be putting on a real windshield!
I struggled with the decision between the 129 and the 137, finally decided on the 129 because I believe it will handle the tight twisty trails a lot better. I had a 17 Renegade 850 and felt the 137 inch track restricted performance in some areas.
Bassett seems to be quite set on a 137 in his article on the 18 Sidewinder. I hope I'm happy with my decision on the 129. I know I'll be happy moving up to the Sidewinder. And I will definitely be putting on a real windshield!

KnappAttack
24X ISR World Drag Racing Champion
- Joined
- Feb 19, 2004
- Messages
- 4,846
- Reaction score
- 6,101
- Points
- 1,733
- Location
- Welch MN
- Country
- USA
- Snowmobile
- 2023 Sidewinder LTX-LE
2017 Sidewinder LTX-LE
I've had many sleds over the years and none of them ever got me as excited as my Sidewinder has. I've owned nothing but Ski Doo 1200's since 2009 and even though I liked all of them I never really looked forward to riding them the following Winter. That has all changed and now for the first time in many many years I'm looking forward to riding my sled next Winter.
I feel exactly the same, can't wait to get the Winder on the snow again. Tried a handful of various machines since 09 and always went back to my old favorite the 1200. Finally have found a machine that I feel exceeds the excellent Doo's.
XP123
TY 4 Stroke Master
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- Sidewinder XTX LE 137
I hope you like your Sidewinder especially coming from an 850 Doo. If you read anything about the 850 on DooTalk it is the most fun sled ever to hit the snow and everything else feels like crap compared to it especially the SW. One of the guys loves it so much he ordered a new Polaris for this year.Mine is still sitting in the crate at the dealership. I've been impatiently waiting for his call to come and get it.
I struggled with the decision between the 129 and the 137, finally decided on the 129 because I believe it will handle the tight twisty trails a lot better. I had a 17 Renegade 850 and felt the 137 inch track restricted performance in some areas.
Bassett seems to be quite set on a 137 in his article on the 18 Sidewinder. I hope I'm happy with my decision on the 129. I know I'll be happy moving up to the Sidewinder. And I will definitely be putting on a real windshield!
WinterWolf
TY 4 Stroke Master
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- Mar 25, 2017
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- USA
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- "2018 Yamaha Sidewinder RTX LE 50th Anniversary Edition"
Mine is still sitting in the crate at the dealership. I've been impatiently waiting for his call to come and get it.
I struggled with the decision between the 129 and the 137, finally decided on the 129 because I believe it will handle the tight twisty trails a lot better. I had a 17 Renegade 850 and felt the 137 inch track restricted performance in some areas.
Bassett seems to be quite set on a 137 in his article on the 18 Sidewinder. I hope I'm happy with my decision on the 129. I know I'll be happy moving up to the Sidewinder. And I will definitely be putting on a real windshield!
I have the 129 50th coming too. I debated too for a while, but coming off a 121, the 129 will feel longer to me. And I'm very happy I decided to go with the 129(from what is written here it looks like the 129 transfers better, and is very fast).
And I don't buy the BS ABOUT The 129 being too short to harness the immense power of the sidewinder..give me a break! If you stud it up correctly, that 129 is gonna kick some serious A$$!! One lug and 3 or 4 more inches of track on the ground wasn't enough to get me to go with a 137. Nothing against the 137, it just isn't for me...I like the shorter tracks on my sleds.
Pstn head
TY 4 Stroke Master
At a 115mph... and exiting the turns like your hanging onto a rocket, you guys will be thinking about how the hell to hang on to this beast and not, Oh fack !!! I should have went with the 137". I don't think the Doo holds a candle to the Sidewinder, or even most Yamaha sleds. The LE IMO rides amazing, the power is addicting. The sled is amazing !!!
XP123
TY 4 Stroke Master
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- Sidewinder XTX LE 137
I can't agree on the Doo vs Yamaha statement. My 1200 Ski Doos were much better sleds in every way than my Apex or Nytro. Now I will agree the Sidewinder is a different story for sure. I can't compare the 850 because I never rode one nor do I have any desire to ride one but compared to any 4 stroke Doo has to offer I will take my Sidewinder hands down.At a 115mph... and exiting the turns like your hanging onto a rocket, you guys will be thinking about how the hell to hang on to this beast and not, Oh fack !!! I should have went with the 137". I don't think the Doo holds a candle to the Sidewinder, or even most Yamaha sleds. The LE IMO rides amazing, the power is addicting. The sled is amazing !!!

stevewithOCD
Yamaha, Make me Come Back
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- 900 R
2006 Apex RTX
1 I wish i went with the 129''
2. I would have bought a 1200 if they put 3 injectors on it to give me 150hp
3. I can't FREAKIN' wait for snow
2. I would have bought a 1200 if they put 3 injectors on it to give me 150hp
3. I can't FREAKIN' wait for snow
Finesy
Expert
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- 2018 Sidewinder RTX 50th Anniversary
2017 Sidewinder LTX SE
I'm a convert (17 Renegade 850). Partly because the Doo dealer blew it, partly because the 18 Sidewinder RTX LE is so gorgeous and mostly because my Yamaha dealer has been awesome to work with. He gave me his demo 17 Sidewinder LTX DX for a day. On another day ride, one of my buddies on his 17 Sidewinder 137 left me on my 17 Renegade in a cloud of snow dust going across a lake. I thought I was going great as I had him out of the gate for a few hundred feet. Then he just grinned and waved as he blew past me. This year will be a different story....
As a kid (1972), my dad had a white, red and black Yamaha 340. Just looking at pics of my 18 Sidewinder brings back the memories.
As a kid (1972), my dad had a white, red and black Yamaha 340. Just looking at pics of my 18 Sidewinder brings back the memories.


DennyTuna
RIP-Logan-Dylan-Never forgotten!
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- 25 Winder LTX LE w/EPS
18 Winder LTX LE W/EPS
97 SX Vmax 600
I went with the 137 50th for all the reasons Bassett mentioned. Being older now ride comfort was the deciding factor. I believe though either one (129/137) you just can't make a bad choice. It comes down to riding preference (styles, terrain)...nothing more! Either way one goes these new 50th edition rockets will draw a lot of attention at any pit stop. Can't wait to saddle up for that first ride.


**sj**
Lifetime Member
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whereas the 137 was head and shoulders compared to a 121 in the past....the 137 and 129 are like splitting hairs now...if you like transfer or are say 200 cheeseburgers or less the 129 is probably for you...if you want a more planted feel..or weight more or want a tad more traction...the 137 might be for you..
Finesy
Expert
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- Apr 18, 2017
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- Manitouwadge
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- Canada
- Snowmobile
- 2018 Sidewinder RTX 50th Anniversary
2017 Sidewinder LTX SE
whereas the 137 was head and shoulders compared to a 121 in the past....the 137 and 129 are like splitting hairs now...if you like transfer or are say 200 cheeseburgers or less the 129 is probably for you...if you want a more planted feel..or weight more or want a tad more traction...the 137 might be for you..
I'm more than 200 cheeseburgers!!!!
Finesy
Expert
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- Manitouwadge
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- Canada
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- 2018 Sidewinder RTX 50th Anniversary
2017 Sidewinder LTX SE
Maybe that will give me more traction.....I'm more than 200 cheeseburgers!!!!
TurboJamie
TY 4 Stroke God
I hope you like your Sidewinder especially coming from an 850 Doo. If you read anything about the 850 on DooTalk it is the most fun sled ever to hit the snow and everything else feels like crap compared to it especially the SW. One of the guys loves it so much he ordered a new Polaris for this year.
You left out the fact he also ordered an 850


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