Snow bike skid and track under 120?

[suva]

Has anyone investigated stuffing a snowbike suspension and track under a zr120? Older used kits can be had pretty inexpensively, most of the tracks are 12" wide but could be ripped down.

 

[Whfd721]

I'm actually contemplating this same setup for my daughter's Polaris 120. We recently replaced the 120 with a pretty built 212 and the short track could use some extension.

 

[hansenmac]

wonder how stiff that track would be, being made for power. i well used track would best. and probably need to cut the paddles down to almost nothing to get some spin sometimes or would be tough on clutches. would be a good unit though.

 

[suva]

I would bet a timbersled track is flexier than an old tech budget track like the 120 came with. Pulled my daughter's 120 out of the rafters and tinkered with it a little today, I think the paddles would need trimmed or a dropped driveshaft for clearance. Inside the tunnel is about 11" wide. Stock 120 suspension is pretty rudimentary I think just about anything would be a big improvement. I think custom drivers would be required.

 

[hansenmac]

could maybe use the drivers and shaft from the bike kit, depending on its width maybe would need to be turned on a lathe and change bearing size in the tunnel. they make cvt kits for the 120's so the drop and roll would just be part of that install. all depends on how wild a person wants to go. you go far enough might as well just buy a 200.

 

[Snow Duck]

I am currently gathering parts to build a 120 Polaris with a old 70's poo 250 2 stroke and a timber sled rear susp with a set of a arms i am going to build also. i have 1/2 the parts and will add a link for when i start in the members build forum. this will be a pit sled aka parking lot ripper

 

[hansenmac]

are you going to use the cv clutches and do a jackshaft? theres kits to do that to 120's for certain cross country racing classes if you need some parts. should be a fun project

 

[Snow Duck]

are you going to use the cv clutches and do a jackshaft? theres kits to do that to 120's for certain cross country racing classes if you need some parts. should be a fun project

Not sure yet as i need to get the skid assembly

 

[Reeb]

I built a longtrack 120 using 200 parts. To drop n roll the driveshaft is the easiest part. It does well but not the half pint sled I was expecting. It goes thru snow just fine but now the problem is lug height. That's where a Timber/Camso track would be ideal!

I recommend a CVT and disc brake on any conversion. It's something I didn't do originally and I really should have. The old chainsaw clutch is fine when you don't have a lot of drag on the driveline, but the more you add to it, the worse the clutches perform(and I've tried half a dozen different ones) Even a classic torque converter setup from Princess Auto works wonders over the stock clutch.

There's two guys that I know of that have done exactly what you are asking. One was a custom built machine that's local, and the other was plastered all over FB recently. Made from a SnoScoot 200 chassis.

If I had the fab skills I'd use a 250 single out of a Tundra and a snowbike kit, make some wider a-arms and use longer shocks....the things we do for our kids! lol

 

[suva]

Thanks I was curious about the cheapo CVTs. Doing some measuring it looks like I'd have to clock the secondary up or do some trimming in the foot well area to get one to fit.