Cvt snow bike

sno*jet · Jan 20, 2016

etec would be ideal if you want to ride for most of a day. wouldnt want a sled sized gas tank on there!

awsome build

d1100t · Jan 20, 2016

Weight and engine size

I agree.
What about cats 500 or 600cc engines.
Are they lighter or smaller?
What's Cats new 600 like on fuel?
It makes pretty good power.

d1100t · Jan 20, 2016

Weight and engine size

I agree.
What about cats 500 or 600cc engines.
Are they lighter/smaller?
What's Cats new 600 like on fuel?
It makes pretty good power.

powdermuncher · Jan 20, 2016

Can't beat the eteck for fuel economy reliability size and weight. Possibly the best all around 2 stroke engine ever build. It just hits the sweet spot on so many aspects needed for sleds and snow bikes.

RDS88 · Jan 21, 2016

As I think about this, wouldn't it be easier to Fabricate the MX chassis onto an existing snowmobile chassis?

j()()se · Jan 21, 2016

Sleds are too wide to build off of. Even a firecat has a 14" wide tunnel. Although you're gonna make me take a second look at the firecat chassis I have sitting around

Sheetmetalfab · Jan 21, 2016

j()()se said:
Sleds are too wide to build off of. Even a firecat has a 14" wide tunnel. Although you're gonna make me take a second look at the firecat chassis I have sitting around

A poo or doo tunnel being in long pieces you can just derivet and narrow the strips, then rerivet.
I've got a 09 poo 800 163 sitting around I should chop up.
Could sell the body and front suspension for a couple bucks.

sno*jet · Jan 22, 2016

RDS88 said:
As I think about this, wouldn't it be easier to Fabricate the MX chassis onto an existing snowmobile chassis?

no way.
end up like a like a fat pig snowhawk.

RDS88 · Jan 23, 2016

sno*jet said:
no way.
end up like a like a fat pig snowhawk.

Not so much. The snowhawk's engine is too far forward, and the rider is still sitting behind the engine.

If someone fabricated the MX chassis to a snowmobile chassis so that the snow engine was in the location of the MX engine, the riders position would be above, or just ahead of the snow engine.

Sorry for my horrible photoshop skills.

sno*jet · Jan 23, 2016

^i see what u mean now. thought you were talkin narrow a sled chassi and put forks on it and all that..
using a sled bulkhead that the motor and tunnel mounts to would still make it too fat i think.

back to the o.p. sorry

J&L Snowhawk · Feb 7, 2016

New frame for future

Working on the next version with 800R motor and aluminum frame

J&L Snowhawk · Feb 7, 2016

New 800r with clutch carbs and all electrical is about 104#
More than I was told but everyone wants more HP

jgw50 · Feb 7, 2016

Great post... did you weigh the 600 and clutches, carb, electric before it went in? Anyone know the weight of a 500?

nblack300 · Mar 4, 2016

Man this looks awesome. I'd love to hear more details as there happens to be a wrecked 800 etec near me...

roo · Mar 4, 2016

Kaarlonen said:
Main problem would be pistons leaning to exhaust side of the cylinder.
The reason why there are many small intake ports and one big exhaus port is that the piston needs enough support to slide down under power stroke.
It would work with reverse rotation for some time but not long.
http://www.marinediesels.info/Theory/torque_2.gif

What about flipping cylinders around? I have a buddy that builds crazy two stroke street bikes, he has done this a couple times with air cooled twins. The bolt pattern on a ptech looks like it would allow this. Would really like a solid answer on why it wouldnt work.
Cheers

Grr · Mar 4, 2016

I also have my sled/bike starting to go together, 154x12.5x2.25, 800 p-tek, cr 450 frame, it is looking sweet!

And will be for sale when it's done!

roo · Mar 4, 2016

RDS88 said:
Not so much. The snowhawk's engine is too far forward, and the rider is still sitting behind the engine.

If someone fabricated the MX chassis to a snowmobile chassis so that the snow engine was in the location of the MX engine, the riders position would be above, or just ahead of the snow engine.

Sorry for my horrible photoshop skills.[/QUOTE

Feet and Knees would be in the clutch and drivetrain. The only way to make a comfortable rider compartment is to move bars back, linkage to forks and pegs back= snowhawk.
The only way we have been able to make it work well with a cvt. Unless you put the motor behind your legs like les did here. Nice work!

nblack300 · Mar 4, 2016

Grr said:
I also have my sled/bike starting to go together, 154x12.5x2.25, 800 p-tek, cr 450 frame, it is looking sweet!

And will be for sale when it's done!

Where do I send my deposit money?

Grr · Mar 4, 2016

Just wait for Les to post pics of the new one it is SWEET. And almost ready to test ride!

Kaarlonen · Mar 5, 2016

roo said:
What about flipping cylinders around? I have a buddy that builds crazy two stroke street bikes, he has done this a couple times with air cooled twins. The bolt pattern on a ptech looks like it would allow this. Would really like a solid answer on why it wouldnt work.
Cheers

If you flip the cylinders you are back where you started. Exhaust pointing forward and intake to the back. Only now you have waterpump and oilpump turning the wrong way and clutch at your right.
If I would use some snowmobile engine I would take the clutch out and put chain or beltdrive between the motor and the clutch. Clutch would be better located at the same side of the belt as the motor. That way it would be some 200mm/8" less width and more cenralized mass.

Cvt snow bike

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