paulthewallt
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Hello All;
Last year I upgraded my sled from a 99 SRX 700 (triple 2 stroke) to a 2009 Nytro RTX SE. While I really loved the SRX for its speed, responsiveness, sound and fun, i couldn't keep up in any rough conditions and off trail. Now, the Nytro is similar in certain respects, but has a fantastic suspension and upgrades-electric start, reverse, 4 stroke etc. My biggest problem, is I'd like my Nytro to handle a little more like my SRX (on trail). The only upgrades to my SRX were a clutch kit, exhaust and C&A Pro Skis.
My SRX could fly around the trails quickly and predictably. It had a much lower centre of gravity. The Nytro is not a "cruiser" and requires a fair bit of work to muscle it through the trails. My question is, how can I get the best of both worlds with this sled? I, along with my mechanic, have made some adjustments to the suspension to get a little more bite on the front end. I'm prepared to buy new skis and have considered Split Rails or the new Yamaha tuners. Any thoughts on the new Yamaha skis and any other recommendations for me??
Thanks for your help,
Paul
Last year I upgraded my sled from a 99 SRX 700 (triple 2 stroke) to a 2009 Nytro RTX SE. While I really loved the SRX for its speed, responsiveness, sound and fun, i couldn't keep up in any rough conditions and off trail. Now, the Nytro is similar in certain respects, but has a fantastic suspension and upgrades-electric start, reverse, 4 stroke etc. My biggest problem, is I'd like my Nytro to handle a little more like my SRX (on trail). The only upgrades to my SRX were a clutch kit, exhaust and C&A Pro Skis.
My SRX could fly around the trails quickly and predictably. It had a much lower centre of gravity. The Nytro is not a "cruiser" and requires a fair bit of work to muscle it through the trails. My question is, how can I get the best of both worlds with this sled? I, along with my mechanic, have made some adjustments to the suspension to get a little more bite on the front end. I'm prepared to buy new skis and have considered Split Rails or the new Yamaha tuners. Any thoughts on the new Yamaha skis and any other recommendations for me??
Thanks for your help,
Paul
Boston RX1
TY 4 Stroke Master
I have done many mods to my two Nytros, but for confidence in handling the corners I went with MTX skis with aggressive sno-trackers. I have the best of all worlds and am very happy with this setup. I hope this helps.
loudelectronics
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I bought a set of Elkas stage 5 shocks to replace my fox evolution x. Boy what a difference. So much confidence now. Skis are planted, soaks the bumps and a pure joy to drive.
newfie09xtx
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I haven't tried this but I plan on it this winter. Hope it helps.
http://www.ty4stroke.com/viewtopic.php?t=50435
http://www.ty4stroke.com/viewtopic.php?t=50435
sleddingfarmer
TY 4 Stroke God
I think the biggest problem with the handling problems of the nytro is the rear shocks are valved like total garbage from the factory. I had the rear shocks on my 09 rtx se revalved by local shock guru, and the difference is huge. Get a nice progressive stock in the rear shocks, so it'll soak up the smaller bumps but not bottom so hard, and the sled will actually 'sit in' its travel a bit, and help distribute the weight of the machine more evenly, and it actually corners pretty well.
The sled sits very tall, especially when comparing to a srx. There are some front end kits out there to lower it, and you can do similar for the rear I believe. Or just do as I said, get the sled to sit down in its travel, and it'll work better all around. You cant expect a sled that sits this tall, and this stiff, to handle well at all, especially when its this heavy and has so much weight transfer. I was running C&A Razors, and noticed it steered much easier after I did the shocks. Steered easier, had more predictable weight transfer, cornered better, rode smoother, and still took the big hits.
I like the float X shocks on the front of the 09 SE. I thought they worked well, but I bet if you upgraded to the Evols they'd work even better.
This is just my opinion, take what you want from it
The sled sits very tall, especially when comparing to a srx. There are some front end kits out there to lower it, and you can do similar for the rear I believe. Or just do as I said, get the sled to sit down in its travel, and it'll work better all around. You cant expect a sled that sits this tall, and this stiff, to handle well at all, especially when its this heavy and has so much weight transfer. I was running C&A Razors, and noticed it steered much easier after I did the shocks. Steered easier, had more predictable weight transfer, cornered better, rode smoother, and still took the big hits.
I like the float X shocks on the front of the 09 SE. I thought they worked well, but I bet if you upgraded to the Evols they'd work even better.
This is just my opinion, take what you want from it
Alatalo
TY 4 Stroke Master
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Hands down - you are never ever going to make the FX Nytro handle like the SRX on a flat and well groomed trail. And the same goes the other way around for a rough trail. The FX Nytro is a high center of gravity long suspension stroke cross country sled. The SRX is a low center of gravity short suspension stroke trails sled. A world of difference...!
Though, you can improve the FX Nytro for flat and well groomed trails.
The first key point is to get the center of gravity down. This can be done by relocating suspension mounting points, like the "mjaremko kit". This can also be done by shortening suspension stroke, by limiter straps or shorter shock absorbers. If you make a big change to the skid, keep track of your center and rear spring preload to not end up in a scenario with low suspension and massive preload. If you make a big change to the front, keep track of your camber geometry.
The second key point is to get rid of some of the nervous behaviour. Relocating the skid backwards makes wonders. So does most of the available front end kits, since they move the skis forward as well as "relax" the trail and castor geometry. If you are looking for a budget solution, shortened upper A-arm joints and lot of ski toe out works.
The third key point is to avoid the Float front shocks. The silly low spring rate in the beginning of the suspension stroke does not exactly help steering response...Get something with a much more linear spring rate and - if possible - a more digressive compression damping (more low-speed compression damping and less high-speed compression damping). A stiffer sway bar works too.
The fourth key point is to limit the weight transfer on acceleration. Do whatever you can to introduce coupling as early as possible. The FX Nytro is a wheelie machine compared to the SRX, and it is certainly not because of the engine...
Though, you can improve the FX Nytro for flat and well groomed trails.
The first key point is to get the center of gravity down. This can be done by relocating suspension mounting points, like the "mjaremko kit". This can also be done by shortening suspension stroke, by limiter straps or shorter shock absorbers. If you make a big change to the skid, keep track of your center and rear spring preload to not end up in a scenario with low suspension and massive preload. If you make a big change to the front, keep track of your camber geometry.
The second key point is to get rid of some of the nervous behaviour. Relocating the skid backwards makes wonders. So does most of the available front end kits, since they move the skis forward as well as "relax" the trail and castor geometry. If you are looking for a budget solution, shortened upper A-arm joints and lot of ski toe out works.
The third key point is to avoid the Float front shocks. The silly low spring rate in the beginning of the suspension stroke does not exactly help steering response...Get something with a much more linear spring rate and - if possible - a more digressive compression damping (more low-speed compression damping and less high-speed compression damping). A stiffer sway bar works too.
The fourth key point is to limit the weight transfer on acceleration. Do whatever you can to introduce coupling as early as possible. The FX Nytro is a wheelie machine compared to the SRX, and it is certainly not because of the engine...
shadow44
TY 4 Stroke God
I've heard great things about the Star Suspension 128" relocate kit for making the Nytro shorties handle much flatter.
mjaremko
Suspended
SRX To Nytro
paulthewallt,
I also came from many years on the SRX model, like you I loved most everything about the sled. As I grew older though the ride or lack of bump compliance began to take its tole on my back. I rode the Apex and the 3 cylinder version but felt that they both were nose heavy and really didnt ride much better than my SRX..........So I bought a Nytro XTX, the Yamaha advertisements said it floated like a 144" and railed corners like a 121" Hmmmmmmmmm, The first time I rode my Nytro I had my Trusty old SRX on the trailer also so I could do a back to back ride on the same trails and snow conditions, what I quickly realized was that the Nytro was smoother over the bumps but you had to ride it slower everywhere for fear of being launched w/out warning off either side of the trail or over the bars, it was the first time in over 30 years of sledding that I found myself trying to control a violent tank slapper??????? As far as handeling was concerned the Nytro was terrible.....everywhere !! So, like many others on this forum I started trying this and trying that but nothing made much of a difference. After around 800 miles of this nonsense I was getting ready to sell the sled.
I had come to the conclusion that between the cheap factory front shocks and overly soft spring and shock valving along with a center of gravity that is the highest in the industry this sled was never going to work ( or be safe ) on the trails without changing at least both.
So I started drilling holes and cutting and moving this and lowering that, what I ended up with was a mostly stock sled that looked quite a bit different than stock, and after the first ride I knew it would never be changed back to stock again.
Here's how it looks now
oh and by the way, I can beat all my buddies on their old SRX's !!
.
paulthewallt,
I also came from many years on the SRX model, like you I loved most everything about the sled. As I grew older though the ride or lack of bump compliance began to take its tole on my back. I rode the Apex and the 3 cylinder version but felt that they both were nose heavy and really didnt ride much better than my SRX..........So I bought a Nytro XTX, the Yamaha advertisements said it floated like a 144" and railed corners like a 121" Hmmmmmmmmm, The first time I rode my Nytro I had my Trusty old SRX on the trailer also so I could do a back to back ride on the same trails and snow conditions, what I quickly realized was that the Nytro was smoother over the bumps but you had to ride it slower everywhere for fear of being launched w/out warning off either side of the trail or over the bars, it was the first time in over 30 years of sledding that I found myself trying to control a violent tank slapper??????? As far as handeling was concerned the Nytro was terrible.....everywhere !! So, like many others on this forum I started trying this and trying that but nothing made much of a difference. After around 800 miles of this nonsense I was getting ready to sell the sled.
I had come to the conclusion that between the cheap factory front shocks and overly soft spring and shock valving along with a center of gravity that is the highest in the industry this sled was never going to work ( or be safe ) on the trails without changing at least both.
So I started drilling holes and cutting and moving this and lowering that, what I ended up with was a mostly stock sled that looked quite a bit different than stock, and after the first ride I knew it would never be changed back to stock again.
Here's how it looks now
oh and by the way, I can beat all my buddies on their old SRX's !!.
