seems like a lot of people have some reserve about new drive belt on the pros with out a belt tensioner,the drive belt on a harley is twice as long and stretch very little with more instant torque going to it the belt on the new pros is half the size of a harley and half the instant torque going to it, just a thought we were having in garage session the other night, any thoughts on this?
new pro drive belt
- Thread starter wi.switchback
- Start date
Been debating that too. Plus, position of brake on top shft leaves you helpless against gravity if belt breaks. CMX positions brake on bottom. Polaris' top brake position take braking stress off belt tho.
yeah but it's the same if you brake a chain "no brakes"
Y
yooper 8
Well-known member
Right on. I think the belt is going to be more consistant and less maintenace
than a chain drive. And just think about having one in the tunnel bag just in
case and how easy it would be to put it on compared to ending your day with
a broken chain, which has happened in our group more than a few times.
It's amazing how many people aren't thinking of this. All they want to do is bioootch about something new. We were told at Dan Adams' clinic that Poo did a stress test on a chain and the belt using some sort of press. The chain snapped at 26K psi, the belt was at 70K and still together, almost 3 times the psi.
Oh well some people aren't happy unless they have something to complain about - oh and don't get met started in regards to all of the keyboard engineers on here.
S
snopro176
Well-known member
IMO, the belt will hold up as good or better than the chain, the biggest thing you have to watch out for on a belt is if something in the engine compartment falls into the belt, it would be nice if there was a lightweight guard to stop anything like a bolt or pipe spring from getting in there.
Don't get me wrong here I think the belt is a stellar idea,I would like find out if I could convert my 11 sba to it
If I break a chain, having no brakes is the least of my worries.
R
robertyoke
Well-known member
the belt drive will out last the cylinder skirts
sad....but more then likey dead on true!
I was told by my dealer it will come as a kit and its going to be about a grand. I went down to talk to him about the new boards. He said its going to cost 1300 to 1500 for both. I think its kind of steep myself. So I think I'm just going to snowcheck a baby blue with white hood 163" pro and save myself some hastle.
Oh the dealer I got my info from is Helena Cycle in Helena, MT. Guys name is Ron. Just so you don't think I'm blowing smoke up your aZ.
yeah for a g note i think ill just leave the chain in it
i have the c3 belt drive on the xp, riding today the belt became loose enought i had to stop and tighten it because of ratching, this is now the second time in 400 miles, it never takes much to tighten, but ir needs a few turns on the tightner
M
modsledr
Well-known member
No smoke... but the dealers do not have ANY pricing info on the new parts... a good "guess" is about $1000 for the parts not including the new drive shaft (the 11/12 will work but be a bit heavier)
As for the 1300 to 15oo for "both" ... you are referring to the Drive PLUS the boards installed ... Right?
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NO STRETCHIE
Fred... I'd be willing to bet that your belt on your SkiDoo XP syncro drive did not stretch... These carbon fiber belts just dont stretch... they snap if they are abused but don't stretch... The teeth can wear out from high mileage... LOTS of miles.
What is more likely is that the tensioner has moved/deflected slightly. The adjuster in your C3 drive is not to accommodate stretch.. but to facilitate changes in drive ratios.
The 3 bolts that hold the idler/adjuster mechanism or the adjuster plate is more likely to deflect than the belt to take a stretch.
If you belt did stretch... the teeth would no longer mesh together... and you would need to buy a new belt as the belt would always be riding up on top of the teeth.
Have a look at the photo below... Notice how tight the teeth are in the sprocket...IF the belt were to stretch (not likely)... those teeth would no longer mesh with the teeth in the sprocket... and climb up on top of the sprocket... no adjuster would be able to compensate for this.
The C3 and CMX drives have adjusters because they have changeable sprockets for different ratios using the same belt... thus making the adjuster necessary.
I know this kicks traditional reasoning about belt stretch... and I'm not trying to be a contrary smart-azz... the Gates Carbon fiber belts just don't stretch more than say 1-2%... by design.
The belts are more likely to strip teeth off the belt at the top sprocket/pulley than break though... I have lots of experience with these same belts in high HP marine/industrial applications and V-twin apps.
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Fred... I'd be willing to bet that your belt on your SkiDoo XP syncro drive did not stretch... These carbon fiber belts just dont stretch... they snap if they are abused but don't stretch... The teeth can wear out from high mileage... LOTS of miles.
What is more likely is that the tensioner has moved/deflected slightly. The adjuster in your C3 drive is not to accommodate stretch.. but to facilitate changes in drive ratios.
The 3 bolts that hold the idler/adjuster mechanism or the adjuster plate is more likely to deflect than the belt to take a stretch.
If you belt did stretch... the teeth would no longer mesh together... and you would need to buy a new belt as the belt would always be riding up on top of the teeth.
Have a look at the photo below... Notice how tight the teeth are in the sprocket...IF the belt were to stretch (not likely)... those teeth would no longer mesh with the teeth in the sprocket... and climb up on top of the sprocket... no adjuster would be able to compensate for this.
The C3 and CMX drives have adjusters because they have changeable sprockets for different ratios using the same belt... thus making the adjuster necessary.
I know this kicks traditional reasoning about belt stretch... and I'm not trying to be a contrary smart-azz... the Gates Carbon fiber belts just don't stretch more than say 1-2%... by design.
The belts are more likely to strip teeth off the belt at the top sprocket/pulley than break though... I have lots of experience with these same belts in high HP marine/industrial applications and V-twin apps.
.
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you could be right, and your theory makes sense, but i know keven at c3 told me the belt will strech a bit on its first day of use, and be prepared to tighten after first hr... but yes i would think if it streched to much the cogs would not allign as you mentioned
Fred... I'd be willing to bet that your belt on your SkiDoo XP syncro drive did not stretch... These carbon fiber belts just dont stretch... they snap if they are abused but don't stretch... The teeth can wear out from high mileage... LOTS of miles.
What is more likely is that the tensioner has moved/deflected slightly. The adjuster in your C3 drive is not to accommodate stretch.. but to facilitate changes in drive ratios.
The 3 bolts that hold the idler/adjuster mechanism or the adjuster plate is more likely to deflect than the belt to take a stretch.
If you belt did stretch... the teeth would no longer mesh together... and you would need to buy a new belt as the belt would always be riding up on top of the teeth.
Have a look at the photo below... Notice how tight the teeth are in the sprocket...IF the belt were to stretch (not likely)... those teeth would no longer mesh with the teeth in the sprocket... and climb up on top of the sprocket... no adjuster would be able to compensate for this.
The C3 and CMX drives have adjusters because they have changeable sprockets for different ratios using the same belt... thus making the adjuster necessary.
I know this kicks traditional reasoning about belt stretch... and I'm not trying to be a contrary smart-azz... the Gates Carbon fiber belts just don't stretch more than say 1-2%... by design.
The belts are more likely to strip teeth off the belt at the top sprocket/pulley than break though... I have lots of experience with these same belts in high HP marine/industrial applications and V-twin apps.
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