Powder Pro's on a M8....
- Thread starter duc848
- Start date
G
geberhard
Member
Part #'s
Do you know the part#s for this?
Here's another great mod! It's a spring from a '04 snopro Costs $5-6 for both of them. Remove the spacer bushings from the ski spindle and the ski floats from side to side. Keep the rubber lubed up good at all times so it slides nice and easy. It also cuts down on darting that some have mentioned.
Wide stance to narrow stance in a spit second!I really like this mod!
Do you know the part#s for this?
A
ACMtnCat
Well-known member
I cant find it on any of the parts diagrams. I'll have Cutlers look it up for me and let you know.
I cant find it on any of the parts diagrams. I'll have Cutlers look it up for me and let you know.
#0702-747
It's on the 05 Sno pro
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G
geberhard
Member
With the spring the ski will just move side to side and not the front end. I have simmons gen 1 on my sled now and like them. I am going to try a pair of powder pros this year. I like the idea behind the spring, as been said just have to make sure the rubber is lubed up to move around.
I would say order 2 #0702-747.
I would say order 2 #0702-747.
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When the front suspension moves up and down, the horizontal distance between the skis changes. Or another way to think about it -- When looking head-on at the sled and moving the suspension, the spindles travel in arcs instead of perfectly straight up and down. This suspension movement creates camber gain.
Breaking down the motion of the camber gain suspension arc (vector mechanics), the majority is vertical motion with a minor horizontal (sideways) component.
Click for animation >>> http://www.miracerros.com/mustang/t_animate_sla.gif
In a vehicle with tires, like the animation above, as the suspension moves up and down, the tires are actually scrubbing sideways on the road. With a snowmobile, we've got a skis with deep keels, topped-off (or bottomed-off
) with steel bars laced with a carbide. Skis are definitely not something that something that likes to go sideways -- It's against their reason for being.On hard packed snow or an icy trail, the carbides and skis are going to "dig in" and resist moving sideways as the suspension tries to move up and down. Since the ski/carbide can't move horizontally, the front suspension essentially binds up in the vertical direction as well. This suspension binding makes for a pogo stick, jerky response from the front of the snowmobile.
The Sno Pro ski springs allow the skis/carbides to remain dug-in and frees up the spindle motion allowing it to slide horizontally on the ski bolt. Since the spindle is now freed up to move side-to-side, the vertical suspension motion we need is now more comfortable, capable and tuneable.
On a M, lift up the front of the sled and take the two spacers out of your skis. Put the skis and ski bolts back in without the spacers and drop the sled to the ground. Bounce the front of the sled up and down and watch the interaction between the vertical spindle and the horizontal ski bolt. After that little experiment, the Sno Pro springs will make perfect sense for those who have to see to believe.
Another advantage I've found with the ski springs is they provide a little more side-to-side forgiveness when bouncing off trees. The ski will hit the tree first, the sled's momentum will collapse the spring, absorbing the impact, albeit to a very small degree.
The Sno Pro ski springs also automatically push the skis out to their widest track width when cruising straight along providing better stability. As soon as you tip the sled up on its side for carving or sidehilling, the spring collapses allowing the ski to tuck in to the narrow track setting. Wide ski spacing when you need it and narrow when you don't want it. The best of both worlds.
In summary, the Sno Pro springs improve front suspension response and provide for automatic ski width adjustment.
No Holiday Express here.
Thanks for a GREAT explanation Saberkitty!
I get it now, and will be ordering two of the above part numbers.
I was worried that I would be carving on one ski and the spring on the ski I'm up on would collapse and the ski stance would change abruptly enough where I would lose my line and then bad, bad things can happen. (How's that for a run on sentence)?
Thanks again
I get it now, and will be ordering two of the above part numbers.
I was worried that I would be carving on one ski and the spring on the ski I'm up on would collapse and the ski stance would change abruptly enough where I would lose my line and then bad, bad things can happen. (How's that for a run on sentence)?
Thanks again
I like this idea but have a couple questions about the bumpers. Do you grease the top and bottom? Is the necessary? Is it just the springs that I need? Do you loose bumpers?
A
ACMtnCat
Well-known member
The rubber bumpers are U shaped and stay under the spindle axle pretty good. I cut/cone the top of the bumpers just a bit so they fit up into the spindle a little looser. I don't like grease, to messy. I just give the bumpers a good spray of WD40 or chain lube spray before every ride.
i've been using the spring on the ski for two sleds now, 4 years of riding....never found a liability with them, but i need to put just a dab of grease on the axle where it slides everyother ride.....the sled tracks better on rutted trails....very nice feel to the front of the sled....
