V-Twin Two Stroke Purpose built Bike

[jethro450]

Dear Santa...


I'm ready for it. Polaris, Timbersled, anyone really, please make it.


I know it can be done.


We could start here with something like this.
http://thekneeslider.com/diy-1000cc-v-twin-2-stroke-project/


Keep it thin like our dirt bikes, cover the motor completely kinda like bullet bike shrouds, tunnel cooler, etc., basically the setup a current snowmobile has except make the motor V-shaped under my feet and only give it one ski. Simple as that. 150hp, just like the 800 sleds please. I'd still even go with a 120 track (some folks like longer and that's ok).


Seriously. Please.

 

[heliwrench]

I've been thinking about something similar as well. There's got to be a suitable motorcycle V-twin 4 stroke out there that will provide the power without too much extra weight and without making it so wide like an 800 twin + CVT does. Maybe a KTM LC8. Not sure how they'd like the constant high rpm.

 

[berknuts]

Looks like two cranks

 

[up-high]

Not much point in 150 hp with a 120 track. There was a vid of a YZ last year with an R1 motor probably 180 hp. Had a short track and didn't do well in deep snow/climbing.

 

[J&L Snowhawk]

That's the exact motor of my dreams. Stuff that in my Sno-Rkt chassis with cvt and bam best bike ever

 

[capulin overdrive]

Looks like two cranks

Yeah, if you read down in the comments it sounds like it's hard to figure out how to get the V's to work with one crank on the 2 strokes without them firing at the same time. Can be done, just not easy for average joe to figure out how to make it work.

 

[udlose]

Some of the European GP race bikes were V twin 2 strokes I think the ideal snow bike is a v-twin 2 stroke, snowmobile clutching, 129-137 inch track, 120 HP, 250 pounds. Whoever does it first is going to sell a lot of machines if they can do it right. it has to be a v twin to keep it narrow enough to use snowmobile clutches

 

[jethro450]

Not much point in 150 hp with a 120 track. There was a vid of a YZ last year with an R1 motor probably 180 hp. Had a short track and didn't do well in deep snow/climbing.

I will happily test! Though I know you're right.

Ok fine, let it be longer. But seriously. Who ever does it first and does it right is going to have the next "RZR" of a product. They'll sell so many they won't know what to do with all the money we throw at them.

 

[Pitster]

Wonder how a built banshee twin 350 would work in a snowbike? A good built motor can be over 75 hp.

 

[jethro450]

Wonder how a built banshee twin 350 would work in a snowbike? A good built motor can be over 75 hp.

I've thought about that and I think it's just gonna be too wide. Like the others have said on here, it needs to be a V twin so it can be thin and it needs to be a two stroke. 120 hp, about 250 pounds. They would sell a crap load of them! And I'm ready for it.

 

[capulin overdrive]

Well, even if the snowmo manufactures never get it together, EFI is coming to 2 stroke bikes.




So a turbo 500 2 stroke would be pretty cool.

 

[CATSLEDMAN1]

ok Santa Claus

1. FI 2 stroke single, 700 , maybe 800cc 100 hp light weight 8-10 speed paddle shift wide ratio transmission. 4 stroke power will not, cannot, overcome its inability to hook in loose material, aka FLUFFLY SNOW.

2. the worst snowmobile under developed technology are those old agriculture clutches spinning at 8000 rpm trying to put you upside down, really bad old time engineering, we don't need it. Its bad for sleds and can't be the future of any type of snow machine.

3. Make the thing mostly out of plastic, snow sticks to all metal, we don't need to ride around on a mobile snow drift.

4. storage and gas capacity, any light weight project today, requires 50bs off added gas safety gear lunch and tools. Nothing light weight about that. All that gear hanging on covered in snow and ice looking like a poorly organized moving day.

5. the BIG ISSUE. the snow bike market is so small it doesn't warrant spending money on much more than more colors of powder coat. If the market was big enough, I can selfishly say I don't want that many pilgrims running all over my favorite riding area.

 

[Grr]

If they built the right snowbike the market would be 5 times the size it is now, so market cap isn't really relevant with todays bikes

 

[summitboy]

The Vtwin motor is real. Its already dyno'd and is a compact package. Just need a bike mfg/designer to grab onto it and take it to the next level. There was pics of it on FB.

 

[capulin overdrive]

1. FI 2 stroke single, 700 , maybe 800cc 100 hp light weight 8-10 speed paddle shift wide ratio transmission. 4 stroke power will not, cannot, overcome its inability to hook in loose material, aka FLUFFLY SNOW.

2. the worst snowmobile under developed technology are those old agriculture clutches spinning at 8000 rpm trying to put you upside down, really bad old time engineering, we don't need it. Its bad for sleds and can't be the future of any type of snow machine.

3. Make the thing mostly out of plastic, snow sticks to all metal, we don't need to ride around on a mobile snow drift.

4. storage and gas capacity, any light weight project today, requires 50bs off added gas safety gear lunch and tools. Nothing light weight about that. All that gear hanging on covered in snow and ice looking like a poorly organized moving day.

5. the BIG ISSUE. the snow bike market is so small it doesn't warrant spending money on much more than more colors of powder coat. If the market was big enough, I can selfishly say I don't want that many pilgrims running all over my favorite riding area.

Yup, we all think we want a cheap go go mobile. But we ain't gonna be happy when there's hundreds of us out there slaying our riding areas in a matter of hours.




Some how there's still sledders ignorant to what the bikes can do. But I've seen threads on ski forums, from BC skiers that see the writing on the wall.

 

[KMMAC]

been seein it

Saw this design back when the first rev came out. The manufacturers will get there, providing the market doesn't collapse. As they slow play it along, but with all of the interest and ideas of what this new series of snow toy should look like I think it will come quicker. There are lots of great engineers out there and plenty of fabricators as well. I look at pictures and check weights and chassis design and have a notion that with the power to weight of a few of the adventure bikes some one will get it. Take the KTM 1290 Adventure R for example, 529 lbs FULL of fuel and 160 horse unmodified. ALL of the parts NOT needed for snow, like, all of the on road tech stuff and so on, I think this bike in particular would be a great candidate. I can see a front frame restructure that would eliminate the need for the use of the fork extender to mount the ski to, and the list goes on. All in all I hope some one builds something like this because, as a friend of mine use to say about sleds, if they quit building sleds like a couch I would be interested in them.
That was back in the nineties.........................................

 

[RMK935VA]

It doesn't need to be 1,000 cc. A nice twin in the 600 cc range would be very adequate. However, it needs to have EFI and oil injection or the market will not accept it.

 

[ravenous]

The KTM 1290 is a great motor for sure. But its big and heavy. Can someone who is better with computers than me please post a link for U.S. Highland. Their 950 v-twin would be perfect. I would buy one at the drop of a hat, if they started producing again.

 

[LoudHandle]

Yup, we all think we want a cheap go go mobile. But we ain't gonna be happy when there's hundreds of us out there slaying our riding areas in a matter of hours.




Some how there's still sledders ignorant to what the bikes can do. But I've seen threads on ski forums, from BC skiers that see the writing on the wall.

More than twenty years ago in Valdez, Alaska we were sledding to places that only Helicopters had been previously. During the World Extream Skiing Championships in Valdez, Alaska in the mid 90's. The current snow bikes can and will make the same places ( although not by the same route) it just takes them 50-60 times as long. My full mod hill climb sleds would climb straight up the chute the skiers raced down in 2 minutes. A snow bike even turbo'd and NO2s'd won't touch it. They have to take the easy way up, and it takes them a couple hours.

I'll build a non-bike based Snow bike that will do it like my sleds did, when I wrap up my other current projects.

 

[KMMAC]

It doesn't need to be 1,000 cc. A nice twin in the 600 cc range would be very adequate. However, it needs to have EFI and oil injection or the market will not accept it.

Part of the whole point was there are v twins out there including smaller versions.
What I was thinking is if some of these engine builders could cut weight by reducing rotating mass even in the transmission a v twin fs would work. The KTM frame is over built but light as well. To build a purpose built the whole design could integrate the engine as part of the frame. I would love to have $$$ to buy and build a 1290 into
this, with a light weight twin exhaust and like I said in the other post a stripped down
wiring harness and so on. Also so I would probably start with a track length of 141 2.6 powerclaw 15" wide. My drafting is not well but I did a rough sketch and with a slightly different track frame design along with the lower fork mounting point which
in turn would lower the seat to give the rider more control on steep terrain. I thought
maybe using a race quad frame would be an option if using a sled engine, the back half of the frame would have to be reworked but not impossible. I also see a new rear suspension system coming but will not say any more just to see if anyone heads in that direction. The design probably has been attempted but not to the point on usable.