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9R XCR vs boost

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#21 ·
mistah_max said:
granted it wil be hard to find a stock boost in a couple of yrs to race against the 9R. but i find it interresting 50cc gives the 9R the lead up to 1000ft compared to the x amount of boost the 850 has in stock form.
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Around here a good setup 850 without a tune is beating stock Boost so it doesn’t surprise me a stock 900 can do the same. It’s all about the setup.
 
#24 ·
I ran the Carl's 900 Kit for a short 260 miles last year just before trails turned to mud. I probably should have ran the Carl's more this year to get a real full feel for it before my eagerness for something new started gaining traction in my sick mind. Over the Spring and Summer I decided to pull the Carl's 900 Top End and re-box it up and put it on the shelf for a bit.. Even though I only ran the Carl's kit 3 days before MUD I will say that I enjoyed it the short time I ran it.

Even though I had the Carl's 900 in my late arriving 2022 Assault I still had high interest in the 9R with the lighter Crank and Flywheel that was suspected to be Snowcheckable for 2023. With my Trail and Offtrail riding the quicker spooling 9R just sounds more awesomer. "How's that for bad english" :ROFLMAO: Of course, I had to SnowCheck the 2023 Boost Assault because the 9R never happened for and the Boost was the only crazy new trail options for 2023 Snowcheck. Polaris again had the thumb in ass disease this year and my Boost hasn't arrived yet and I'm highly considering backing out on it at this point. Reasoning for that is I'm more of a trail and offtrail rider than high straight line speed guy. When I think of the 9R -vs- a stock Boost I feel the 9R is the better suit for me. If I do get the Boost I'd absolutely have no intention of running it stock. The Boost stock is a tease for what it would be with a tune. Personally, with the 850 Boost I'd have to drop the 900 in it with a tune. "JUST BECAUSE"

This year I dropped two new engines that I had built for me over the Summer in my 2021 and 2022 Assault's.
Each motor is a little different and probably nothing like anybody has tried here before? Don't ask... I'll start a thread later in the season when I get more time dialing these in, on the saddle.
Currently I have a 2021 850 motor with 2,000 miles on the shelf. Another 2022 850 with 0 miles and a Carl's 900 Top End with 260 miles both on the bench as well.

For guys that enjoy warranties and who really doesn't? I would like to try one of these 9R Assault's to see what extra is felt in Trail and Off Trail riding with a warranty intact.
I know for anybody that's into building nasty motors and tricking out Boost's that the 9R is a bunch of Fluff. I still would like to see what POO puts on the table with it??
 
#25 ·
Ummm for anyone that’s into building building a nasty Boost they are better off just going with a n/a 850 or 900 and then adding an aftermarket turbo setup or building their own turbo setup. The Boost is limited with its turbo size and being non intercooled. Not that it can’t be changed on the boost but at that point I would go a different route.
 
Discussion starter · #26 ·
BattleStorm said:
Around here a good setup 850 without a tune is beating stock Boost so it doesn’t surprise me a stock 900 can do the same. It’s all about the setup.
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do you think the lack of experience and aftermarket parts for the new P22 is the main reason the boost dosent perform better?

i mean, the power is there from what i read, but the performance dosent seem to follow in stock form..i really taught the same gap between the 650 and 850 n/a would be seen between the n/a and boost.
 
#27 ·
BattleStorm said:
Around here a good setup 850 without a tune is beating stock Boost so it doesn’t surprise me a stock 900 can do the same. It’s all about the setup.
Click to expand...
See there is the issue and quote a good setup 850 , well put a good setup 850 vs a good setup boost and well we know the out come , have to realize the boost trail sled is in its first year next may be a different story .
 
#29 ·
mistah_max said:
do you think the lack of experience and aftermarket parts for the new P22 is the main reason the boost dosent perform better?

i mean, the power is there from what i read, but the performance dosent seem to follow in stock form..i really taught the same gap between the 650 and 850 n/a would be seen between the n/a and boost.
Click to expand...
The difference between a 650 and 850 is 30-35hp and they weigh the same. The boost is heavier and makes 15hp more then a na 850. Problem is guys are finding they can’t clutch the boost to its peak Hp without det. Now it becomes a 10hp different revving the boost higher.
flasch7192 said:
See there is the issue and quote a good setup 850 , well put a good setup 850 vs a good setup boost and well we know the out come , have to realize the boost trail sled is in its first year next may be a different story .
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No issues, good setup stock vs stock is one thing and stock to stock is another where the boost is faster. Just saying a stock clutched 850 can take a stock Boost in a drag race so no surprise a 900 will do the same.
I agree the Boost will get better with time. I’ve heard rumors they will be eventually be intercooled.
 
#30 ·
Lost count of how many posts from boost owners and others claiming they easily beat an NA 850. Far more than the other way around.

When the sidewinders came out plenty of claims on people beating those too. All this stuff seems like Groundhog Day. Any sled can lose . And it’s usually because of traction
 
#32 ·
ultrazls1 said:
Lost count of how many posts from boost owners and others claiming they easily beat an NA 850. Far more than the other way around.

When the sidewinders came out plenty of claims on people beating those too. All this stuff seems like Groundhog Day. Any sled can lose . And it’s usually because of traction
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Yeah I’ve never lost to a stock turbo cat or Yamaha with a 800 or 850.
 
#34 ·
I could beat all my friends 800s and 850s at the time with my 19 850 etec. My buds father in law stock xtx would beat me every time. On top end. And it had a 1.75 track lol. My 850 hit 108 gps on a dirt road in 30 degree temps. Ran pretty strong

Guess we’ll see how slow this piece of crap is soon. Trip with sone friends next week. Heading up right now with the wife but will be two up
 
#36 ·
BattleStorm said:
The difference between a 650 and 850 is 30-35hp and they weigh the same. The boost is heavier and makes 15hp more then a na 850. Problem is guys are finding they can’t clutch the boost to its peak Hp without det. Now it becomes a 10hp different revving the boost higher.

No issues, good setup stock vs stock is one thing and stock to stock is another where the boost is faster. Just saying a stock clutched 850 can take a stock Boost in a drag race so no surprise a 900 will do the same.
I agree the Boost will get better with time. I’ve heard rumors they will be eventually be intercooled.
Click to expand...
Every race I’ve seen with a boost is 1000ft or less so maybe short distance but long distance by -by .
 
#39 ·
Looks like a decent win and they let off pretty early. Not sure what everyone was expecting . Looked like a good 3-4 sleds in a shortish run when they let off. That’s about what I would expect maybe nothing strange about it imo. The guy commenting must have been watching a different race than me

 
#40 ·
What's the consensus for boost peak hp rpm? 8000? had mine running at 8100-8150, no deto yet. it's set up for 8050 next time out. See how that goes.
N/A vs Boost. in my situation the Boost SBA was a lot of fun in the powder with stock clutching at 8350-8400. Slow on the hardpack. Holy belt dust batman! My N/A SBA with clutching biased to off trail is similar off trail but quicker on hardpack. Equivalent track and gear on both sleds. I've proved it to myself that my Boost makes more power than my N/A, it just doesn't put it down with stock clutching. At 1800 to 2200ft where I ride the boost feels strong compared.

9R vs Boost- 9R with more power than 850 and quicker revving stock, I'm putting my money on 9 in shorter stuff for now.
In my limited SBA experience don't plan on winning too may races with a stock clutched Boost
I intend on tuning my Boost someday but for now it's gonna be good as I learn a boosted sled
 
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