Wondering about a totally different clutch?

[Choco]

Has anyone ever thought about using Honda's VFR 1200 F Dual Clutch on a sled? This is a remarkable clutch, not an automatic in the old sense. It's a somewhat normal motorcycle clutch with two sets of plates and shifts automatically or manually. One clutch plate is always engaged. Here is a video of it. http://www.youtube.com/watch?v=SBfsCSZwsAc

I'm not sure if it would work or if it would weigh too much or would it be lighter than a snowmobile clutch, driven pully and chaincase? I suppose the chaincase would be about the same. Just wondering what folks think as clutches tend to be power robbers and belts are expensive.

Explore this link to see cutaways and better diagrams of the clutch: http://world.honda.com/motorcycle-picturebook/DCT/detail/

 

[Jon Mutiger]

The one thing your over looking is there is no transmission on a sled to provide the required gear ratio's and range. You'd essentially have to add a gear box.

I'd say it's not really beneficial for the snowmobile market for that alone.

Jon

 

[longtrack156]

With the computer technology on the sleds now I would think someone would put a servo positioner on the secondary, do away with all the helixes, springs etc.

 

[Coldfinger]

Or, for someone more capable than I, take that whole Honda motor from a wrecked bike and drop it into a snowmobile chassis.

I don't know what the net result in weight would be vs a Nytro but you'd be eliminating the CVT system so bye bye primary, secondary, chaincase.

That motor is a shaftie, so someone figure how to convert to sprocket.

Top speed on the Honda is probably around 170 so given the much smaller dia drivers I'm not sure what that would equate to, but you could decrease the driven sprocket size so maybe that is a non issue because you don't need 170 top speed.

 

[Jon Mutiger]

Even if you did just somehow retro fit that whole motor/tranny setup from the Honda into a sled, you would still have to get the power into the track. That means you'd have to drive a chaincase much like snowbikes do now. I think chain driven CVT's have severe HP limitations, thus why they are only used on foofoo cars up to this point. The idea is you can keep the RPM of the motor at it's ideal operating rev-range over any speed. The dual clutch setup your talking about doesn't really do that.. Since you still only have so many gears to choose from. A computer controlled, chain driven CVT could be a better option than a belt driven one, but it would definately be heavier and we don't want heavier do we?

 

[Coldfinger]

Jon,

Why don't you think the drive system couldn't be direct, like from the engine sprocket to the drive axle sprocket, both sprockets on same side of sled?

I haven't calculated final drive ratios and sprocket sizes needed. May not be realistic and would require the gears inside the engine cases be changed. Off top of my head, it seems theoretical that an engine which could take the bike to 170 may be able to propel a sled to 70 if a smaller sprocket is used on the drive shaftr.

I realize this Honda motor is shaft but I'm sure someone could figure out how to change it to sprocket.

 

[AKSNOWRIDER]

polaris has been working on computer controlled hydrauliclly shifted clutches for at least 6 yrs....no weights/springs/helixs..and no heat..no slippage..problem was weight and size..but that was 6 yrs ago...

 

[allpowersports]

Pivario

http://www.pivario.com/?p=1

Pivario V1 Sport
New! Black anodized aluminum for the one who like sport driving and wants to make their own characteristic. Are delivered with tools and PC-cable etc.
PRICE:1848 USD

 

[TBird]

Pivario is a very cool clutch, with many benefits compared to an regular secondary, especially for sleds towing heavy weights cause it have "hold" function a.s.o. but it's not for everyone, yet anyway, when i tried a sled with one it stalled the engine when i braked loose the track to turn sled around on parking lot,,, so with more sensors attached to get inputs on certain key points, jackshaft speed, brake, it would work alot better.

Sent from my YP-G70 using Tapatalk

 

[longtrack156]

Pivario is a very cool clutch, with many benefits compared to an regular secondary, especially for sleds towing heavy weights cause it have "hold" function a.s.o. but it's not for everyone, yet anyway, when i tried a sled with one it stalled the engine when i braked loose the track to turn sled around on parking lot,,, so with more sensors attached to get inputs on certain key points, jackshaft speed, brake, it would work alot better.

Sent from my YP-G70 using Tapatalk

Trouble is all the sensors are already there on an EFI sled if only the manufacturer would go that route