• I've received emails and PM's asking me about "Group Buys" and promotions.

    A Group Buy here on SnoWestOnline.com would be a situation where a normal member (non vendor or mfg) personally collects orders from other members. That member then uses those orders to negotiate a better price with the Vendor/Mfg for HIS/HER "Group" of buyers.

    Here is an example of a viable "Group Buy"

    http://www.snowestonline.com/forum/showthread.php?t=269222

    A promotion that has the words "Group Buy" in the title is still a promotion, and from the rules that were handed down to me by Harris Publications is that non-advertisers cannot run promotions or open sales programs on the forums outside of the swapmeet.

    If a members wants to become a group buy manager, maintain a thread and collect the funds and negotiate a group buy... as a member, you are welcome to do that as long as you are not attached to the business of the vendor or Mfg.

    If you are a vendor/MFG and you want to offer an EXCLUSIVE "SnoWestOnline ONLY" promotion that is exclusive to snowest readers, please contact me and you'll be able to put it up in the Polaris forums.

    Also, before any vendors/mfgs get all "riled up" over this know that the moderators are strictly volunteers and do not receive a dime from any advertising $$ spent on this site.

    As ALWAYS, since DAY ONE of me becoming a moderator, I have pioneered, supported and encouraged vendors and mfgs in getting the word out to our readers with "New Product Announcements.

    Have a great season.

    From this point on, all vendors/mfg's promoting Pre-Season tiered sales programs, in the Polaris Forums, that are not paid advertisers will be appropriately moved to the swapmeet section of the forums.

    MH

ECU and Speedometer readings: belt drive vs. chain drive

Mar 2, 2009
43
10
8
So I was running an ECU from a 2016 belt drive Axys RMK in my 2017 chain drive Axys RMK today (long story as to why but it doesn't matter to my question). I knew the speedometer would be off since the drive ratios are different. I was thinking maybe 20%.

But yesterday I hit 118mph on a short straight stretch of trail according to the PIDD gauge... I don't think I was even doing 50 actual ground speed... I expected to be off maybe 15-20% (I could calculate the actual % I would expect based on different gear ratios and the diameter of the 3" drivers but again doesn't matter right now).

Is there something completely different about the pickup for the speedometer sensor? I thought they both worked off of the hall effect on the disk brake rotor... maybe a different number of holes in the rotor or something? Sensor is on the brake rotor...

On second thought:
What I am really looking for is someone who has some detailed knowledge of how the speedometer pickup works on the belt drive and chaincase, if there is some kind of "converter" in the wiring or in the ECU, I know the ECU records hours and the gauge records miles (I am sure I piled up a few miles on that ride), but does the ECU tell the gauge the speed, based on some internal calculation of some sort? It would seem so, since the only thing I switched was the ECU. ECU #1 from 2017 chain drive: accurate speedometer, ECU #2 from 2016 belt drive sled" wildly optimistic. And yes, I made sure the injector color and oil pump number was set correctly for my sled.
 

Sheetmetalfab

Well-known member
Lifetime Membership
Oct 5, 2010
6,181
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Ak
So I was running an ECU from a 2016 belt drive Axys RMK in my 2017 chain drive Axys RMK today (long story as to why but it doesn't matter to my question). I knew the speedometer would be off since the drive ratios are different. I was thinking maybe 20%.

But yesterday I hit 118mph on a short straight stretch of trail according to the PIDD gauge... I don't think I was even doing 50 actual ground speed... I expected to be off maybe 15-20% (I could calculate the actual % I would expect based on different gear ratios and the diameter of the 3" drivers but again doesn't matter right now).

Is there something completely different about the pickup for the speedometer sensor? I thought they both worked off of the hall effect on the disk brake rotor... maybe a different number of holes in the rotor or something? Sensor is on the brake rotor...

On second thought:
What I am really looking for is someone who has some detailed knowledge of how the speedometer pickup works on the belt drive and chaincase, if there is some kind of "converter" in the wiring or in the ECU, I know the ECU records hours and the gauge records miles (I am sure I piled up a few miles on that ride), but does the ECU tell the gauge the speed, based on some internal calculation of some sort? It would seem so, since the only thing I switched was the ECU. ECU #1 from 2017 chain drive: accurate speedometer, ECU #2 from 2016 belt drive sled" wildly optimistic. And yes, I made sure the injector color and oil pump number was set correctly for my sled.

The speedo reference holes in the brake discs are at different diameters.
 
Mar 2, 2009
43
10
8
The speedo reference holes in the brake discs are at different diameters.
Makes sense, sort of, the hall effect sensor should detect the number of holes, right? I looked at the parts online microfiche(?) and the hole count looked the same but of course that is just a drawing and not necessarily what is actually produced.
 
Mar 2, 2009
43
10
8
Can anyone look at their belt drive sled's disk brake rotor and figure out how many holes it is going to pass over during one revolution of the disk? Thanks in advance...
 

Ski-Dont89

Well-known member
Lifetime Membership
Mar 2, 2010
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WYOMING
I have the opposite scenario as you, i converted a factory chain case sled to belt drive, so when im doing 25-30 it reads 10 mph.
 

Ski-Dont89

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Lifetime Membership
Mar 2, 2010
747
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WYOMING
Trade you ECUs? LOL... stock flash (now), yellow injector, 2016 / 17
I would consider it but mine is silber turbo flash.
Nice, setting up for great resale on your "super low mile" sled down the road! 😜
Haha, yeah i probably could if i was a dishonest person. I would be transparent about it. The hours are accurate, which in my opinion tells just as much as miles do for a mountain sled.
 

BeartoothBaron

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Nov 2, 2017
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Roberts, MT
Yeah man, just joking around! It's usually pretty easy to spot a sled with low miles that's been rode hard and put away wet, or one that's had the ODO fudged. Not sure if it's the same with the AXYS, but it surprised me that the mileage on Pros is logged on the display, not the ECU. I'd guess the hours too. So a dishonest guy could put 5000 miles on his sled, swap displays with his wife's 1000-mile sled, and presto!
 
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