Interesting. I know you are extremely smart on the Polaris site so thank you. If my boost isn't built yet, is it a reasonable assumption that it will come with belt 3212348? If so, what belt are you recommending? Any ideas if the P22 changes, impacted belt size, I assume not but never know. Thanks.

 

Interesting. I know you are extremely smart on the Polaris site so thank you. If my boost isn't built yet, is it a reasonable assumption that it will come with belt 3212348? If so, what belt are you recommending? Any ideas if the P22 changes, impacted belt size, I assume not but never know. Thanks.

Interesting. I know you are extremely smart on the Polaris site so thank you. If my boost isn't built yet, is it a reasonable assumption that it will come with belt 3212348? If so, what belt are you recommending? Any ideas if the P22 changes, impacted belt size, I assume not but never know. Thanks.

Thanks for the compliments.
I tried to check which belt was on the displayed Boost at the Snow Show, but couldn't read the number.
But, unless the primary has been setup for the 2325 belt, I suspect it will be the 2348 belt.
If so, I'd try to get the dealer to reshim the primary and install the 2325 belt. He probably will refuse to do it. That's because the new flash was developed for the 2348 belt according to the Polaris Rep at the show. The average rider probably won't know the difference anyway.

 

Change the ECU program for a different belt? Sounds a little like hearsay?? What would the flash do to change anything related to a different belt?

 

Apparently, it must change the EPA readings due to different throttle positions, loads, etc.

Or, it required ECU readjustments partially because the original belt was highlighting deficiencies in the tune that were causing the hanging throttle when the belt would drag due to being too tight.

All I can say is leave the tune alone unless you are having any of the issues. My BIL's son had no issues on his 2019 XC850 until he had the latest reflash. Then, he noticed fade at top speed after hard running.

 

I’d be really surprised if Polaris made a new flash for a belt change. If they did it’s not because of epa, the emissions test are done on a dyno. It could be something to do with the idle but I still doubt it.
Yes, the 19 850’s have a richer tune, make less hp, less pipe heat and should have less tendency to fade.

 

I’d be really surprised if Polaris made a new flash for a belt change. If they did it’s not because of epa, the emissions test are done on a dyno. It could be something to do with the idle but I still doubt it.
Yes, the 19 850’s have a richer tune, make less hp, less pipe heat and should have less tendency to fade.

I can't wait to race a 2024 Boost. That should help tell if they're improved by the tune. So far, my 2019 XC850 is as fast or faster than any reflashed XC 850s I've compared it to. Which really isn't many as snow has been poor for several years.

 

I was not able to race or even inspect a MY 24 Boost last season. Mainly due to very poor snow and ice conditions.

But, a shorter and narrower belt if used on a 24 Boost will certainly reduce acceleration and top speed. This is because that belt will sit lower in the 2ndy at launch and will not climb as high in the primary clutch at full shift.

It will also tend to misalign the clutches if the same clutch alignment tool is used to set the offset.

The engine should also be better aligned with less forward twist and more 2ndy float. This will help provide the best CVT shift range gearing especially at launch.

I'm convinced that this is a major reason why my Boost (and my 2019 XC 850) launches so well and gets great fuel economy.

 

Did anyone get to try the difference between the 2325 and the 2348 belts yet?
Had very informative discussion about this very subject while mocking up my 9R with it's terrible lead-in, c-c, and sheave clearance. Lack of being able to shim for sheave clearance is a major pain so using different belt seems answer but trying to find actual dimensions of the2324 vs 2348 seems non-existant.

 

I posted measurement differences somewhere on here last year…

 

I'm planning a trip to Gaylord Friday. Will take both my 23 Boost and 19 XC850.
Hope to run into some other Polaris sleds with the P-22 clutch to compare to.
That area has lots of snow and is getting more.

 

Don’t forget your dragy 😂

 

So on my 2024 Boost Assault can I just run a 3212325 belt without shimming? It came with a 3212348, I could only put 209 miles on last year. Sled worked awesome. But thinking of just putting the 23 belt 3212325 on this year.

 

The 2325 belt is about .020" wider and .35" longer. I believe you can use it if you have enough belt side clearance at rest. My MY 23 Boost has enough and works very well. But, my sled has .020" side clearance with a brand new belt. Many 23s did not. Just rode 162 miles Friday and Saturday in Graying, MI. Now have 614 miles on sled and belt.

 

HRSS recommends the Ultimax xs801 belt as an option. They claim it drops rpm 100-150
Vs stock

I rode from Gaylord this weekend. Friday was awesome. Saturday was ok until the afternoon. By the end of the day Saturday they were getting pretty bad and I had a hard time keeping the temps under 140. Sled feels like it definitely drops hp at that temp imo

 

Just think what intake temps were , lol