Ok so let me ask this. Would you rather have a 2" track or a 2.5" cut down to a 2" by the sounds the cut down track is much stiffer. But how stiff is to stiff? I've read that the stock Polaris track is very stiff and not good? I guess the track needs to flex a bit. Now I'm looking at a Camoplast Challenger 144x15x2" Any one with experience with this track.
mtdream
TY 4 Stroke Master
ruffryder said:
wrong, the track length is your constant...and it is measured around the angles and bends.... (i.e. the circumference)
the rails lengths is only consistent with the length of the bottom part of the trapezoid...not the difference of the total...
mtdream
TY 4 Stroke Master
Bamboo said:
must be a flatlander thing, why on earth would you want to spend more to get a 2.5" only to cut it down to a 2"?
if yoru in the hills, a 2.5" is WAY better...regardless if your a boondocker, climber or jumper...
yamahaboy701
TY 4 Stroke Junkie
Bamboo said:
Cutting down a 2.5 would be pointless and a waste of money.
Somebody on here rides with a 144x16x2". I believe it is MtViper.
Another thing to keep in mind bamboo is that the when you go with a taller or longer track you will lose speed because you need to re-gear most of the time. Another reason the backcoutry track is a good option. You don't "need" to change the gearing.
ruffryder
TY 4 Stroke Junkie
mtdream said:
no dude, seriously. What does a suspension look like compressed? What shape? It looks pretty dang close to an rounded rectangle, does it not, kind of like a long oval with the ends being determined by the circumference of the drives and of the rear wheels?
As to the math, take a look at this one. What do you think is the difference between the length L2 and L1+d? with d being equal to the amount of setback or the length that the rear axle moved? I am saying that with a 9" longer track, the difference between the two is negligible.
Should we do an example?
Lets assume the angle of L1 = 30 degrees so that would be 160 degrees between L1 and the length d.
Lets assume Length d = 4.5" and length L1 = 24".
When you calculate length L2, I get 28.27" The difference between L1 and L2 is the change due to setting the rear axle back 4.5"
The difference between L2 and L1 = 4.27" This is the change in the track length due to moving the rear axle back 4.5"
So a difference of almost 0.3" about a quarter of an inch.
Since the slack is taken up at the rear of the axle, and I shorted the length of the top by a little bit, the rear axle will need to be adjusted forward about 0.3"/2 or .15" or about 5/32's or a large 1/8 of an inch.
Did the everyone get that?
How accurate are you talking here? To the nearest tenth of an inch? Note that I assumed some numbers and angles here. Shallower angles result in much less error. As well as if the ration of d to L1 is decreased (smaller d or larger L1).
What is your number then for the distance for rail extensions?
Note that if there is an adjustment range of about 1" in the rear axle, that allows you to accept almost a 2" change in track sizes.
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Crewchief47
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Personally, I think both of you guys are putting WAY TOO MUCH effort into this math. 
ruffryder
TY 4 Stroke Junkie
This is my break from work... man, that sounds more lame then what I was hoping for.Crewchief47 said:Personally, I think both of you guys are putting WAY TOO MUCH effort into this math.
So I like numbers? Does that make me a geek? Crap, where did my pocket protector go?
Not looking for new tracks to cut down. Figured if I came across a used one that I would cut it down. Thats what sparked this whole thing. Found a bunch of used Mavericks for $150 each. Gearing down is not a big deal I'm no lake racer, top speed is my last concern. I've PM'd with MtViper about his 144 2" track before, great guy with lots of knowledge. Its just hard to pass up a $150 track that might do the trick.
Crewchief47
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ruffryder said:
I'm glad we're airing out math problems while waiting for the next snowfall rather than trying to strangle each other through the monitors. LOL!
ruffryder
TY 4 Stroke Junkie
Crewchief47 said:
Next snowfall? Your season over with? Mine just hit its deepest depth of the season.
1crazieyamaha
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Bamboo
I ran my 2004 Warrior with the ripsaw 136 x 1.25" for 2 years and then changed it over to a new Camoplast 136 x 2.0" Factory Vmax style Challenger found in California on Ebay .(stiff design old challenger???) Went to 8 tooth extroverts also. It drastically changed this machine...I went from getting stuck in 3 feet of snow to looking for deeper pow. Also this track grabs on the trail as good or better than that 1.25'(others may disagree). Now supercharged, running around that 200 hp mark it's unbelievable.
So my point is : What I seen in the 2" x 136 track for Flatlander riding and moderate slope climbing & my new nytro mtx 153...don't go longer! You will not be happy... I would watch for the old style 144 x2" and nab one if possible.
I ran my 2004 Warrior with the ripsaw 136 x 1.25" for 2 years and then changed it over to a new Camoplast 136 x 2.0" Factory Vmax style Challenger found in California on Ebay .(stiff design old challenger???) Went to 8 tooth extroverts also. It drastically changed this machine...I went from getting stuck in 3 feet of snow to looking for deeper pow. Also this track grabs on the trail as good or better than that 1.25'(others may disagree). Now supercharged, running around that 200 hp mark it's unbelievable.
So my point is : What I seen in the 2" x 136 track for Flatlander riding and moderate slope climbing & my new nytro mtx 153...don't go longer! You will not be happy... I would watch for the old style 144 x2" and nab one if possible.
1crazieyamaha said:
You wouldn't happen to have a part number for the old style track? I have found a new one for $569 not $150 but I guess its just a swap and go. If I don't need to re-gear for a 1.75 what gearing should I use for a 2"??
mtdream
TY 4 Stroke Master
Ruffy, your forgetting the point....the angles mean nothing as they are governed by the constant which is the track length...
The rail length is not constant with the track length...however, the ratio of increase is...
The rail length is not constant with the track length...however, the ratio of increase is...
ruffryder
TY 4 Stroke Junkie
mtdream said:
mtdream, I think you are making this too complicated.. as your supposed disagreements are stating the same thing that I have already stated.
So anyways, what is your number? How far back should the extensions go?
1crazieyamaha
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Bamboo
Okay this is what I found....
136 x 15 x 2" Part # 8DP-47110-00 = 1999 MM700 stock track( Identical lug pattern as the Camoplast Intense but it only comes in 1.5 no larger profile and not 144" for what I noticed in my searching tonight.)
I am not sure what the 144" part # is but some hunting around and it might turn up. Maybe there is a DEALER out there with a new one sitting in the back corner...forgotten about...anything possible.
As far as gearing the stock drivers were 9 tooth and I dropped to 8 tooth which is about an 11% loss or gain. These sleds were geared way to fat in my opinion. Had the ol' speedo showing 125mph (stock)once on the dream o meter...were was the gps when you need it... at 120 the skis would lift and i couldnt steer any more so let off... (about 2 mile strait...logging road trail.) Never seen it again...lol
Just thought I would do ya a favor. Measured my 2009 Nytro Mtx 153 track.
1)___Track touching concrete in garage= 50"
2)___Rail length from from front of end cap(anti spear plastic cap) to outside of rear idler wheel/inside track = 61"
3)___Limiter Strap Bar bolt to rear idler wheel(Same as above) roughly 55".
Okay this is what I found....
136 x 15 x 2" Part # 8DP-47110-00 = 1999 MM700 stock track( Identical lug pattern as the Camoplast Intense but it only comes in 1.5 no larger profile and not 144" for what I noticed in my searching tonight.)
I am not sure what the 144" part # is but some hunting around and it might turn up. Maybe there is a DEALER out there with a new one sitting in the back corner...forgotten about...anything possible.
As far as gearing the stock drivers were 9 tooth and I dropped to 8 tooth which is about an 11% loss or gain. These sleds were geared way to fat in my opinion. Had the ol' speedo showing 125mph (stock)once on the dream o meter...were was the gps when you need it... at 120 the skis would lift and i couldnt steer any more so let off... (about 2 mile strait...logging road trail.) Never seen it again...lol
Just thought I would do ya a favor. Measured my 2009 Nytro Mtx 153 track.
1)___Track touching concrete in garage= 50"
2)___Rail length from from front of end cap(anti spear plastic cap) to outside of rear idler wheel/inside track = 61"
3)___Limiter Strap Bar bolt to rear idler wheel(Same as above) roughly 55".
