drose18
Newbie
Hello all, I recently purchased a 2009 Fx Nytro Se and i am new to Yamaha, I came off a Ski Doo Rev. I have been reading alot of the posts regarding the suspension on the forum but the one question I have I can not find so i'm hoping you all may be able to answer it. When I purchased the sled and got it home I noticed the track was not sitting flat on the ground only the rear 18" was making contact. I also noticed when I sat on the sled the rear suspension would drop apporx 6-7"(free play) with zero resistace when I got off there was no rebound I could lift on the rear bumper and it would raise the same distance before lifting the rear off the ground. I played with the pressure in the front shocks (float x) and was able to get the track on the ground more which also seemed to cure the dead zone in the rear suspension it had great action and rebound, it felt as if once I got on it the rear suspension was right there also the dead zone went from 6-7" to 1-2". I ended up going back to the factory settings on all the suspension becasue I was throughly confusing my self, when I did the front of the track again was lifted off the ground. Is this normal? Thanks For Any Input.
Snowbound One
Newbie
Welcome to the Nytro world! I think you're in for a real treat with power and performance that will smoke just about all your friends. I maintain an 08 RTX Nytro and went through the same learning curve. The free play you speak of is only free to a very slow rate of shock compression and rebound, that is YOU exercising the machine. But when the suspension reacts to the trail in fractions of a second, thats where the shock rates come into play. That free space you speak gets fully exercised when you go through the stutters soakin up bumps. The factory set up is nice but once you figure out what kind of sledder you are, you'll want to dial in the the best shock rates you can find. Some people have adjusted the front limiter strap all the way in, hence only the rear of the track has bite with a studded track. Riders do this so the machine will turn more freely. For me it has been a balance between what carbides you run up font. (I run Stud Boy 6" Deuce bars which off great performance. Some say they are too heavy in the turns, but with so many suspension setups and rider styles you have to take everybody word with a grain of salt). With the front limiter strap all the way in, turning is good, but the front end feels heavy. The more limiter strap you let out the less down pressure you will have on the skis. Strap on the carbides you think you want then start letting out the front limiter strap out to find the sweet spot. In my opinion, by doing this you are asking the front part of the suspension to share the load on soaking up the bumps and not letting the rear do all the work. The other area you want to begin to play with is the the shock compression and rebound rates. This will be determined by rider aggressiveness. I weigh in with gear at 230, my success over the stutters at roughly 45-55 mph is to go full soft on rear shock compression, then 3/4 full soft on the rebound. It is here that I felt some of the bumps go away while sitting. From this point I still need to play with the rebound rate to see if things will improve further. The same can be said about the front tunnel shock rates. To my way of thinking, at a moderate to high rate of speed, you want the shocks to soak up (compression, soft rate) the bumps and let the rebound rate control the return (bounce). I've come along way already, but I'm sure there is more to learn. What ever you do, be patient and do one thing at a time. Pick out a serious set of stutters about a half mile long, lose your trail buddies. Bring a screw driver to make trail side adjustments. Each time you run your test, run it at about the same speed. Then adjust. You'll be amazed on your results! Good Luck, enjoy the raw power!
drose18
Newbie
Thanks A Ton For The Advice And Input! I have only been lucky enough to rip it around once this year (due to the lack of snow here in Michigan) and that machine is a totally different machine than what I am used but love it. Let me ask you this if i may.. It sounds like by what your saying regarding getting it dialed in that it needs to be adjusted and ridden, adjusted and ridden and the machine will react totally different when on the trails than sitting in a garage? We weigh anout the same what do you have your front shocks psi set at?
Snowbound One
Newbie
Happy to help out a fellow RIPPER! Fronts are at 65psi with the skis elevated off the ground. Only bottomed out the fronts once over a slow ditch banging move. Tried 85 psi and it felt too stiff for me, stay within 50 to 65 psi and your be in the zone for best ride. I have no clicker adjustments so I can not control any rebound rates. Wish I could! The Nytro's ride over small to moderate bumps is beautiful, power is awesome coupled with studs. Bolt on good carbides up front, you'll have max control through the turns. My next adjustment is to begin to let my front limiter strap out to the number three or four position from all the way in, (currently at number two from all the way in). With the limiter strap further out it, should lighten up the ski and turning pressure a bit and put more of the rear suspension to use. BTW, I also have my main load springs set to "H" or high. for my weight and use of overall suspension travel. After this, I'm going to go full soft on the front shock compression, and 3/4 full soft on the rebound rate and see where that gets me. The ride is great from the factory, just looking for that extra edge through the heavier stuff.
