edge_232
Expert
- Joined
- Jan 15, 2014
- Messages
- 254
- Reaction score
- 25
- Points
- 388
- Location
- Madison WI
- Country
- USA
- Snowmobile
- 2011 Nytro MTX slowly being modded
2005 IQR Trail Converted
Nice work Mike! I'm glad you finally got it done & it look great! She was a long process I remember when you started this one.
Mountaintech
TY 4 Stroke God
Nugget....not dense....I suck at explaining.
The 2009 spindles gave the Nytro more high speed stability because the offset axle uses some of the weight of the sled to keep the skis tracking straight. That's why Yamaha made the change.....people complained about the 08 darting and lifting the inside ski, which the offset definitely helped in 2009 and newer sleds. The price you paid for that stability was more steering effort.
On side hilling, the Nytro was never the RMK ....we all know that....but seemed to get much better with the a-arms moved forward 3 or 4 inches and increasing caster from 22 to 25+ degrees (skinz, barcode, mountaintech all added caster), but doing so with 09+ spindles increased steering effort even more. Nothing they could have done about this problem.....It's what came with the sled!!! It's in this situation the 08's should work better.
Figured someone would call me out on my ski analogy....LOL....What I was trying to say is a Downhill ski is built more for high speed stability and less for cornering...but it still corners very well. A slalom ski is meant to turn on a dime...and turn a lot... but has a tendency to wander nervously if you point them straight down the hill. Yamaha decided in 09 we needed downhill skis more than slalom and that's what we got. I think had they done their homework, they could have left the 08 spindles on the mountain sleds to make them more maneuverable and easier on the shoulders and put the new spindles on the turbo lake rockets
OTM
Stock caster on an MTX is right around 23 degrees. The Mountaintech arms do not add caster, however they are the only arms on the market that allow caster adjustment without affecting other adjustments. Mountain tech arms have caster adjustability from around 20-27 depending on your subframe. I prefer running around 23 degrees, which works well. Another difference between the 8GL and 8HK spindles is the location of the tie rod end attachment points.