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#31 Couch1

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Posted 26 January 2021 - 05:22 AM

These G boost belts are new so not a whole lot of info, but everything I’ve read they’re the real deal. If you like to clutch tune the Xs 821 can be a great belt, but on some sleds it can pull rpms down so you may have to adjust for that. 571 durable, but has its own issues. I should have my gboost today and will have some miles on this weekend and will report back

#32 MX-Z Man

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Posted 26 January 2021 - 07:02 AM

The GBoost sounds interesting. Its always nice to see new options that actually work.

On the 821 RPM drop, I've found the 821 is faster at few 100 RPM less than the factory belts at the higher RPM.

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#33 Jeb©

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Posted 26 January 2021 - 08:32 AM

I have a completely stock mxz 850 tnt (129") with the 1.25" rip saw with 90 picks down the middle. I bought it used in August and have not run it yet due to lack of snow.  It has a 531 belt on it that looks it should be changed. I suspect its the original belt since the sleds got 3700 miles and the previous owner says he never blew a belt.  Should I buy a 571, XS-821, or one of these G-Boost belts?  I care about the best performance and not so much about the price.  I don't really want to change anything except the clickers.  Also, I do plan to buy the clutch vent upgrade kit since the 2018 was not vented and and I want to keep the clutches cool with this new belt from the get-go.  Most guys on here have renegades which not only have more track and weight but are geared different.  Because of this there is not really a ton of good info on this site on what worked best on the 129" sleds.   Thanks

If you only want to adjust clickers I would buy a 571. I think the gboost would work good with 1 click down but I do not know.


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#34 Jeb©

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Posted 26 January 2021 - 08:38 AM

The GBoost sounds interesting. Its always nice to see new options that actually work.

On the 821 RPM drop, I've found the 821 is faster at few 100 RPM less than the factory belts at the higher RPM.

the 821 is a nice belt option for stock clutching and no studs, when you start loading with a lot of traction or just better clutching the 821 starts losing response and backshift. The 821 really loads early, again great belt for lower traction and no studs.


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#35 skidoodude04

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Posted 27 January 2021 - 07:10 AM

Tried 2 Gboost belts today, DBSD383 and WBB383. Both fit length and width very similar to a 571, wide belt with length. Also ran 821 and an aged 571 that might be down 100rpms or so. Had a Gates Redline as well but it is too wide for my shimmed primary,
21 xrs, 25 45 gears, Hrss pdm2 setup. 571 is spot on rpms 7800 and builds to 79-8000. snow covered lake with some icy patches but nothing you would break loose on once hooked up, only about 800-900ft and you have to get out of it, top speed on dream meter 104- could have got more but not looking to kill my breaks yet. Sorry, no real data but temps some info on the how the belts fit in with others. Did about 15 belt changes and a lot of mid speed running getting them all heat cycled a couple of times so very time consuming.

WBB383 is very similar to a 571, maybe 100-200 rpms more or very similar to a new one. Will spend some time with this one comparing long term to 571.

DBSD383 is very soft and grippy, very similar to the XS821. Both of these belts grip so well that for the clutching I was running today you could pin it bottom to mid and be 600-800rpms low and then it would build to around 7800, so final rpm 200 less than 571 and 300rpm less than WBB383. final top speed in the short distances were the same on all belts but as noted, short distances so does not mean much. Not sure when I will have time to dial in the softer belts, would need a lot of weight pulled to get the response with the Ramps I am using.

All belts were pretty similar on clutch temps in these conditions, fast easy rolling, belts side temps were all 100-130 deg F depending on where you hit it and fixed primary sheave was 125-150F on all. Harder belts could have used more weight and softer belts less so nothing was dialed perfect yet.

So if you like XS 821 and your clutching works well for that belt try the DBSD383,

If your clutching is setup for Doo belts the WBB383 is what you would want. Will dial this one and get some miles on before I attack the others.
FWIW the only belt that was noticeably different on temp today was a Gates Carbon fiber, quite hot comparatively. Also if you have not shimmed your Pdrive the Redline will probably engage a bit lower and load early with it is width.


This looks interesting but for the cost Idk that I can leave the xs821 lol. $87 and I get a warranty. Best belt I’ve ever put on and where are you getting 2 belts for $87 plus the $15 shipping on the warranty belt lol

#36 Jeb©

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Posted 27 January 2021 - 07:15 PM

This looks interesting but for the cost Idk that I can leave the xs821 lol. $87 and I get a warranty. Best belt I’ve ever put on and where are you getting 2 belts for $87 plus the $15 shipping on the warranty belt lol

they are 2 different animals. The 821 is very grippy down low and soft works good in the right application. The gBoost is harder, more consistent when loaded properly. If you are happy with your 821 results no reason to change.


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#37 BellevilleMXZ

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Posted 27 January 2021 - 10:10 PM

Do you find either gboost feels close to a 531? I dont like the 571. Ive played all over with weight on the PDM2s and prefer the 531 "feel"


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#38 Ed Hochuli

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Posted 28 January 2021 - 08:44 PM

First picture was my best HRSS pdm1 setup with xs821
Last is PDM2 with GBOOST after a few runs of moving magnets.

Conditions we're not great by any means, lots of spin off start and loose tracks to follow
Results were consistent, best of each setup 409b7ea7ec516ebd93fd3b3f7f697dfb.jpga635ab96b6838354e92280e2b3f86097.jpg

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#39 Jeb©

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Posted 28 January 2021 - 08:57 PM

The grippy feeling belt is not always the best. You want proper grip


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#40 Ed Hochuli

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Posted 28 January 2021 - 08:59 PM

Pdm1 xs821099557affc2ffdca657201700c1b34b0.jpg

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#41 Ed Hochuli

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Posted 28 January 2021 - 08:59 PM

Pdm2 gboost belt0920991d4984c44b7ba397fb26b1d1d7.jpg

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#42 Jeb©

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Posted 28 January 2021 - 09:00 PM

Do you find either gboost feels close to a 531? I dont like the 571. Ive played all over with weight on the PDM2s and prefer the 531 "feel"

neither of the gboost belts feel like a 531 or 571


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#43 Jeb©

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Posted 28 January 2021 - 09:02 PM

Pdm2 gboost belt0920991d4984c44b7ba397fb26b1d1d7.jpg

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makes sense, the 821 is -4 g from 571 and the gboost is 2-3g more than 571, gboost loves weight in 1 and 2 with the gboost.


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#44 InTheSticks

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Posted 28 January 2021 - 10:04 PM

Your teasing me with wanting to pick a couple of these up, I bought 5 571 when I picked my sled up, sure we will use them but these are sounding pretty good.


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#45 MX-Z Man

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Posted 29 January 2021 - 11:31 AM

First picture was my best HRSS pdm1 setup with xs821
Last is PDM2 with GBOOST after a few runs of moving magnets.

Conditions we're not great by any means, lots of spin off start and loose tracks to follow
Results were consistent, best of each setup 409b7ea7ec516ebd93fd3b3f7f697dfb.jpga635ab96b6838354e92280e2b3f86097.jpg

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Good info but it really doesn't mean much, does it? Of course the 2 set up should be faster/quicker than the one. 

 

If the 2 didn't offer an improvement why build it? 


gallery_5_57_615.jpg

The XP was the most fun sled ever made - but I liked my XR more. The 850 takes it to a whole different level. But darn, the 900T is Bad to The Bone! 

No Need to Freeze-buy a set of these! http://www.coldguards.com/





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