SideWinder Gearing, Tracks and Drivers

[MrSled]

I just received this info from Yamaha on the gearing of the SideWinder Models.

Track Lengths: 129 – 137 = 9T Drivers x 2.86 Pitch & 21/41 Gearing

Track Lengths: 141 x 1.6 & 153 X 1.75= 8T Drivers x 3.00 Pitch & 21/41 Gearing

Track Lengths: 141 X 2.25 & 153 x 2.25= 8T Drivers x 3.00 Pitch & 24/50 Gearing

Track Lengths: 162 X 3.00 = 7T Drivers x 3.00 Pitch & 21/49 Gearing

 

[bleedyamaha]

Are these number subject to change? Good info Tom !!!

 

[MrSled]

Are these number subject to change? Good info Tom !!!

These are not going to change for this model year. From what I was told the other info that was out there was a mistake on some models but correct on a others..

 

[cannondale27]

Awesome! That should help alot.

 

[MrSled]

Awesome! That should help alot.

I added to the FAQ too

 

[cannondale27]

Did you ask what belt it uses?

 

[Port-Parts]

Did you ask what belt it uses?

The Sidewinder models will use the 8JP belt - same belt as Viper

 

[woodzynh]

What's the top speed with the 8T 21/41?


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[SRXracer]

@Port-Parts did I just see something on here about the narrow ski stance? Can't find it back now!?!

 

[MrSled]

@Port-Parts did I just see something on here about the narrow ski stance? Can't find it back now!?!

http://www.ty4stroke.com/threads/btx-mtx-mountian-adsjustable-ski-stance-update.141702/

 

[Snowaddict]

The Sidewinder models will use the 8JP belt - same belt as Viper

A yamaha demo rep also told me this when I asked at the dealer. Is there any concern this will be able to handle the extra hp of the sidewinder? Seems to me there's somewhat of a difference in hp/power between a viper and sidewinder. Would assume the SW would be harder on belts.

 

[Port-Parts]

Not a sidewinder but I ran the 8JP belt on my turbo viper all last season with zero issues - I see no reason to panic over the belt choice at this point as it has passed yamaha testing for this application.

 

[BornYamaha]

At 1 to 1 shift out at 8750 rpm the 21/41 calculates out to about 102 mph

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[Port-Parts]

What's the top speed with the 8T 21/41?
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That was the gearing (21/41) and driver size (8T) in my Viper XTX w/MPI Trail Turbo this past season and seeing 100-105 on varying snow conditions was common - possibly a little more on ice/pure hardpack but I ride mostly trail/offtrail and didn't search out those conditions to try.

 

[fatchance]

That was the gearing (21/41) and driver size (8T) in my Viper XTX w/MPI Trail Turbo this past season and seeing 100-105 on varying snow conditions was common - possibly a little more on ice/pure hardpack but I ride mostly trail/offtrail and didn't search out those conditions to try.

Is that the 141 1.6 cobra or did it have more lug than that?