Just wondering if anybody has done any MX track riding on one of the new Polaris Outlaw 500 or 525 independant rear suspension quads? do they jump well?

 

Welcome to the forum codester. I never rode MX or rode any of the Outlaws but Polaris themselves seem to think the 450 MXR is better for MX.

 

The MXR450 is designed for the track.

The Outlaw IRS does jump relatively good. I don't know that I would try to hut a 70 foot double or any kind of triple but the Fox Shocks do a great job.

 

IRS does not jump or corner as well as a solid axle....... there is a reason Eichner ditched the IRS for the WORCS series. It just does not work as well for MX type racing..... In fact none of the top XC guys are using the IRS either, so obviously they found no advantage in it there either....... The IRS seems to work well in desert or Baja type racing, and for places where the trails are super rough.

 

The IRS actually corners better than SRA. It allows both rear wheels to stay on the ground. If you are the kind of person who likes to slide the back then you won't like the IRS. It takes a lot more to break the back end loose on a IRS. The IRS corners like it is on rails and comes out of the hole like a sling shot. It does take some getting use to.

 

<div class="FTQUOTE"><begin quote>Originally posted by: ss97

IRS does not jump or corner as well as a solid axle....... there is a reason Eichner ditched the IRS for the WORCS series. It just does not work as well for MX type racing..... In fact none of the top XC guys are using the IRS either, so obviously they found no advantage in it there either....... The IRS seems to work well in desert or Baja type racing, and for places where the trails are super rough.</end quote></div>


Eichner though has had better sucess on the sra,and will probably move back to the irs next year

 

<div class="FTQUOTE"><begin quote>Originally posted by: scrambler400enoge

<div class="FTQUOTE"><begin quote>Originally posted by: ss97



IRS does not jump or corner as well as a solid axle....... there is a reason Eichner ditched the IRS for the WORCS series. It just does not work as well for MX type racing..... In fact none of the top XC guys are using the IRS either, so obviously they found no advantage in it there either....... The IRS seems to work well in desert or Baja type racing, and for places where the trails are super rough.</end quote></div>





Eichner though has had better sucess on the sra,and will probably move back to the irs next year</end quote></div>

That is not what he said....... he said in the WORCS series the IRS is too hard to tune for each race because the tracks are so technical and fast. He said IRS does funky things when pushed hard in whoops and off cambers. He said that it just takes too long to tune for each track.

 

<div class="FTQUOTE"><begin quote>Originally posted by: Stoopidbot

The IRS actually corners better than SRA. It allows both rear wheels to stay on the ground. If you are the kind of person who likes to slide the back then you won't like the IRS. It takes a lot more to break the back end loose on a IRS. The IRS corners like it is on rails and comes out of the hole like a sling shot. It does take some getting use to.</end quote></div>

It does not corner better at high speed.....lol ....no way...... that "sliding" you are talking about is exactly what makes it possible to go around such sharp turns so quickly. Just like "drifting" in auto racing makes the same thing possible.....

The IRS likes to high-side much easier than SRA as is the nature of the design....

The stiffer the IRS the more it will act like a SRA in the corners, but then what suffers is the straight line comfort. And there is the hitch right there and most of this is from a conversation I had with a guy who races both.........

IRS is great, it offers a softer ride, and more ground clearance. But in order to make it exactly (or close enough) like SRA, you need to run it very stiff and that takes away from some of the benefit of having IRS in the first place. Then all you have is a SRA riding machine with an extra 20-pounds trailing behind you.....so what is the point?

That is why IRS is good for Baja racing.... the turns are big and wide, and you can get away with the IRS because it is not the turns where the race is won/lost. You can still run the IRS soft enough to reap the rewards of it, and stiff enough to dampen the rough stuff. Losing a half second in a turn won't matter because there are no turns.....

In MX the race is won/lost in the turns and on the jumps. And those turns are fast and sharp, and constant the entire race......if you lost one-10th of a second in each turn you will be in last place by the 5th lap.... You see those guys on two wheels all the time with 200-pounds hanging off the inside barely enough to stop it from high-siding..... and jumping has to be perfect every time...... SRA has the clear advantage here......Look at Dustin Wimmer sometime, he wins because of his turning technique.......

In XC racing, I don't know where the IRS is falling short. Perhaps like Eichner said for WORCS being that it takes too long to dial in, maybe that is the same reason none of the GNCC guys are using it..... I would think IRS would be just as good as SRA in XC racing, perhaps better in some areas of the track and perhaps not as good in others......

 

Miss type the other way around he has had better sucess on the irs than the sra even though the suspension is difficult to dial in.But he atleast he proved irs can be made winner when he won worcs.