snoprof6
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16 Zr 6000 LTD
02 Sx Viper
02 Sx Viper
nice, let us know how it performs when you got it all dialed in and go to do some test climbs haha
It's together and it's going. I have about 35 miles on it so far. I had to trim a little bit off my rail caps because they were hitting the extrovert driver teeth when the front of the skid compressed. Right now there's some vibration going on a lower speeds, I think when the suspension compresses at certain points the drivers are still rubbing the rails. I'll be checking into that tomorrow, and hopefully get a few pics up soon.
I think I also need to gear it down a bit. I'm at the stock Apex GT 24/38 gearing and I think that's a bit steep. I was thinking either 23/40 or 22/40..what do you guys think? I wasn't paying attention to what the engine was pulling for rpms - I will check that out.
The stock skis don't work so well - which I expected somewhat. They don't float at all and push terribly (partially due to my suspension/transfer setup but still) I'd like to get some Slydog Powderhounds but not sure I want to spend the money for them right now. We'll see.
Otherwise I really like the sled! I had never ridden a Yamaha 4 stroke sled before or even heard one run. I'll try to get a few pics up and more of a ride report soon!
I think I also need to gear it down a bit. I'm at the stock Apex GT 24/38 gearing and I think that's a bit steep. I was thinking either 23/40 or 22/40..what do you guys think? I wasn't paying attention to what the engine was pulling for rpms - I will check that out.
The stock skis don't work so well - which I expected somewhat. They don't float at all and push terribly (partially due to my suspension/transfer setup but still) I'd like to get some Slydog Powderhounds but not sure I want to spend the money for them right now. We'll see.
Otherwise I really like the sled! I had never ridden a Yamaha 4 stroke sled before or even heard one run. I'll try to get a few pics up and more of a ride report soon!
As of today I have 50 miles on my first-ever 4 stroke:
I love this motor. With the bottom end torque you can pull the skis up pretty easily. It's geared a little high right now for the setup but it pulls hard. I plan on gearing it down some to get a harder low end punch - I won't be doing speed runs with this thing so top end doesn't matter.
This is also my first sled longer than 136", and I really like it so far. Flotation and traction are on a whole new level compared to the Viper, which had a 121"x1.5" deep paddle track. I should have had a long track from the beginning, even for here in SW MN. Not to mention it looks pretty cool
The suspension works really well. I've never ridden a mono skid so I can't compare the two, but I'm really happy with this setup. This is an uncoupled skid and it can really transfer weight if you want it to. The ride is smooth and I have yet to bottom it out - I'm a pretty lightweight guy and often have had to settle with borderline stiff suspensions in the past, this one is soft enough. I'm on the softest compression click right now so if I do start bottoming it there is some adjustability. There was some concern that an uncoupled skid vs. coupled skid would be too soft, that does not seem to be the case. The GYT-R front clicker shocks are great as well, this is probably the smoothest sled I've ever ridden.
I have about 1" (maybe a bit more) of hanging free sag in my track right now and no ratcheting with the extroverts. However the drivers do make some noise/vibration at times and from what I've researched I might need to tighten up the track some - the Yamaha MTX drivers supposedly last longer and work better that way. The track does not rub anywhere.
The stock trail skis are awful in my conditions and with the long track. My riding so far has been all ditches and deeper snow, and all they want to do is push or let the sled slide down the ditch slope. Takes some work to go out of a ditch on an angle or even to turn around. Also, the front sinks like a rock in powder on deceleration or on impact (the skid does a good job of transferring weight when on the throttle). So a friend was gracious enough to borrow me a set of Yamaha mountain skis from his Apex MTX. Night and day difference! The flotation and steering capabilities are much better and it handles the way I expected it to now. With these skis and this suspension setup, the Apex handles the ditches as well as my old Viper with the snocross skid. Needless to say I'll be putting a set on.
With the MTX bar riser and rider forward seat position, this sled fits me very well. I don't have any complaints in the comfort department. The transition from standing to sitting is easy and natural, and the bars aren't too high so they aren't comfortable when sitting down. They are low enough that I can see the full gauge pod while sitting. I also really like the handlebar hooks - I ride very aggressively and I like the extra grip and feel they provide.
I'm excited to get some more miles on it and see how it works in some different conditions. Sounds like we have a heck of a snowstorm whipping into shape right now!
I love this motor. With the bottom end torque you can pull the skis up pretty easily. It's geared a little high right now for the setup but it pulls hard. I plan on gearing it down some to get a harder low end punch - I won't be doing speed runs with this thing so top end doesn't matter.
This is also my first sled longer than 136", and I really like it so far. Flotation and traction are on a whole new level compared to the Viper, which had a 121"x1.5" deep paddle track. I should have had a long track from the beginning, even for here in SW MN. Not to mention it looks pretty cool
The suspension works really well. I've never ridden a mono skid so I can't compare the two, but I'm really happy with this setup. This is an uncoupled skid and it can really transfer weight if you want it to. The ride is smooth and I have yet to bottom it out - I'm a pretty lightweight guy and often have had to settle with borderline stiff suspensions in the past, this one is soft enough. I'm on the softest compression click right now so if I do start bottoming it there is some adjustability. There was some concern that an uncoupled skid vs. coupled skid would be too soft, that does not seem to be the case. The GYT-R front clicker shocks are great as well, this is probably the smoothest sled I've ever ridden.
I have about 1" (maybe a bit more) of hanging free sag in my track right now and no ratcheting with the extroverts. However the drivers do make some noise/vibration at times and from what I've researched I might need to tighten up the track some - the Yamaha MTX drivers supposedly last longer and work better that way. The track does not rub anywhere.
The stock trail skis are awful in my conditions and with the long track. My riding so far has been all ditches and deeper snow, and all they want to do is push or let the sled slide down the ditch slope. Takes some work to go out of a ditch on an angle or even to turn around. Also, the front sinks like a rock in powder on deceleration or on impact (the skid does a good job of transferring weight when on the throttle). So a friend was gracious enough to borrow me a set of Yamaha mountain skis from his Apex MTX. Night and day difference! The flotation and steering capabilities are much better and it handles the way I expected it to now. With these skis and this suspension setup, the Apex handles the ditches as well as my old Viper with the snocross skid. Needless to say I'll be putting a set on.
With the MTX bar riser and rider forward seat position, this sled fits me very well. I don't have any complaints in the comfort department. The transition from standing to sitting is easy and natural, and the bars aren't too high so they aren't comfortable when sitting down. They are low enough that I can see the full gauge pod while sitting. I also really like the handlebar hooks - I ride very aggressively and I like the extra grip and feel they provide.
I'm excited to get some more miles on it and see how it works in some different conditions. Sounds like we have a heck of a snowstorm whipping into shape right now!
rxrider
Jan-Ove Pedersen
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kinger
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Outstanding! Now when you get bored in 2-3 years add boost and the sled doesn't even feel the same again! They are remarkable sleds! Nice job!
This is a nice build.I don't know how I missed this thread until now?
A few pics from this winter...
Weapon X
TY 4 Stroke Junkie
Needs black powder coated rails otherwise nice unit.
granto211
TY 4 Stroke Junkie
sharp looking sled, what u end up with for gears?
I went with 21/38 for this year and that worked pretty well for me.
Super Sled
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This turned out to be a really cool build. Nice job on the restoration and great skid idea!
RtxViper
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Great job!
Super Sled
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Hey RTYsxv, any new pics or info hoe the sled is going?
I'm thinking on and off about a low boost supercharger, not for this season but the next. Something like a ~40 hp gain, pump gas, minimally invasive.
I've got a few ideas about putting together a setup of my own using a positive displacement supercharger. A screw-type charger would be ideal, but there's a lot of Roots chargers around from bigger engines that can be had for cheap. I have this idea in my head that I could relocate the battery and stick the supercharger in that space, and have the pulley come out by the oil tank similar to the MPI centrifugal supercharger kit. I need to do some calculations and try to figure out if using a bigger blower at low speed and low boost might help out the inherent inefficiency of the Roots design.
Much more research to be done.
I've got a few ideas about putting together a setup of my own using a positive displacement supercharger. A screw-type charger would be ideal, but there's a lot of Roots chargers around from bigger engines that can be had for cheap. I have this idea in my head that I could relocate the battery and stick the supercharger in that space, and have the pulley come out by the oil tank similar to the MPI centrifugal supercharger kit. I need to do some calculations and try to figure out if using a bigger blower at low speed and low boost might help out the inherent inefficiency of the Roots design.
Much more research to be done.
