Ulmer clutch kit, anybody know if there is top end gains???

[ranger1]

I searched ulmer clutch kits in the forums & from what I gathered, pretty much everyone says that the kit pulls hard in the bottom as well as in the mid & has awesome backshifting. I found nothing on top end gains however.
Does anybody know if & how much top end this kit produces over stock?
I asked Allen himself & he stated that I would see 6-7 mph gain(with the 23t gear) at the top. I e-mailed him back & asked if he could guarantee those speed increases as I had bought many clutch kits for my Polaris's & they all had none to very minimal top end gains.
I am happy with the bottom & mid range on this sled already. Most of my riding consists of long lake runs & this is why I am more concerned on gaining more top end & fuel efficiency than anything.
It has been almost a week & I have as of yet heard back from Allen, so I would like to hear from actual riders what the top mph gains they have achieved from this kit??
The best I have seen on my sled was 107 on hard pack, real speed......must go faster!! lol
Thanks!!!!

 

[sleddog66]

Don't think a clutch kit alone is going to see you much top end gain,,,,if any. From what I have read, the gearing change may help some. Otherwise you need to start adding power through mods

 

[ranger1]

Don't think a clutch kit alone is going to see you much top end gain,,,,if any. From what I have read, the gearing change may help some. Otherwise you need to start adding power through mods

Hahahahaha, thanks sleddog66 but I think I will stay away from mods such as "NOS" etc for now... don't get me wrong, I know damn well you can pull a lot of extra HP out of these sleds, but I just want to stick with a bit of clutching ( only if it gains in the top) & a gearing change to either a 23 or 24 on top.
Thanks again

 

[Heritage]

Don't think a clutch kit alone is going to see you much top end gain,,,,if any. From what I have read, the gearing change may help some. Otherwise you need to start adding power through mods

Hahahahaha, thanks sleddog66 but I think I will stay away from mods such as "NOS" etc for now... don't get me wrong, I know damn well you can pull a lot of extra HP out of these sleds, but I just want to stick with a bit of clutching ( only if it gains in the top) & a gearing change to either a 23 or 24 on top.
Thanks again

I am still a rookie when it comes to clutch tuning...but this 07 attak GT I bought, has an Ulmer stage two kit in it...it is definately faster than my stock 06 attak..how much faster on top??? Don't know..haven't gone on a long enough pull..I will say from 50-90 mph it's a hugh difference...my GT cleans my friends RTX's clock... 5-6 sled lengths everytime..and he is also running a clutch kit..though not an ulmer

 

[RSVECTORFREAK]

I'm my experience none of them give you any top end gains...You get faster from top to bottom but won't gain anything on top for speed. In alot of cases you actually lose top end. I ran with 3 buddies all the same sleds, 2 were clutched 1 was stock. We ran 10 miles on lake and both clutched sleds pulled out to a lead but after 2 miles the stocker passed us both up top!! It's all what you want and I wanted faster corner to corner speed rather than top end. You want more top gear it higher..

 

[ranger1]

I'm my experience none of them give you any top end gains...You get faster from top to bottom but won't gain anything on top for speed. In alot of cases you actually lose top end. I ran with 3 buddies all the same sleds, 2 were clutched 1 was stock. We ran 10 miles on lake and both clutched sleds pulled out to a lead but after 2 miles the stocker passed us both up top!! It's all what you want and I wanted faster corner to corner speed rather than top end. You want more top gear it higher..

So if I am happy with the current corner to corner acceleration & am only interested in gaining in the top end, a clutch kit would be a waste of time & money for my needs. So I should maybe concentrate on gearing it up a bit instead? The 07 RTX is geared low, 22/38, so there could be some speed to gain by going up a gear or two!
Thanks, I think I am getting somewhere!! Wuhoo!!!

 

[Frozenstiff]

Do a search on gearing up. Lots of debate, and you need perfect ice conditions to maybe pull any more than a 23 tooth.

 

[ZapeX2]

you could always just run full out down hill, that should gain ya some top end... sorry, couldn't resist. I see it as when the clutches are at full shift then there is no more, I could totally be wrong, just guessing, maybe there is some shift left from stock? I don't understand how a kit could gain you top end but if Allen says it does than it does...

 

[snowbeast]

Don't think a clutch kit alone is going to see you much top end gain,,,,if any. From what I have read, the gearing change may help some. Otherwise you need to start adding power through mods

Hahahahaha, thanks sleddog66 but I think I will stay away from mods such as "NOS" etc for now... don't get me wrong, I know damn well you can pull a lot of extra HP out of these sleds, but I just want to stick with a bit of clutching ( only if it gains in the top) & a gearing change to either a 23 or 24 on top.
Thanks again

Drop down to the 23 top,and get your full shift rpms around 10,800 thru 11,000 and hold on,all my apex/attaks have run 112 to 117 on perfect conditiond all gps verified.

 

[snowbeast]

I'm my experience none of them give you any top end gains...You get faster from top to bottom but won't gain anything on top for speed. In alot of cases you actually lose top end. I ran with 3 buddies all the same sleds, 2 were clutched 1 was stock. We ran 10 miles on lake and both clutched sleds pulled out to a lead but after 2 miles the stocker passed us both up top!! It's all what you want and I wanted faster corner to corner speed rather than top end. You want more top gear it higher..

So if I am happy with the current corner to corner acceleration & am only interested in gaining in the top end, a clutch kit would be a waste of time & money for my needs. So I should maybe concentrate on gearing it up a bit instead? The 07 RTX is geared low, 22/38, so there could be some speed to gain by going up a gear or two!
Thanks, I think I am getting somewhere!! Wuhoo!!!

No,the 07 rtx,does not benefir from taller or shorter gears,the ck skid robs power,it is what it is,with that sled.

 

[FireStone]

inmy case, no gains on top speed, but no lost!

 

[quebec#1]

I'm my experience none of them give you any top end gains...You get faster from top to bottom but won't gain anything on top for speed. In alot of cases you actually lose top end. I ran with 3 buddies all the same sleds, 2 were clutched 1 was stock. We ran 10 miles on lake and both clutched sleds pulled out to a lead but after 2 miles the stocker passed us both up top!! It's all what you want and I wanted faster corner to corner speed rather than top end. You want more top gear it higher..

Same her i have played with kits for my xc , my viper and the apex no gains on top end but you might get their faster !
Yamaha stock clutches are about the best in the market when it comes to stock setups.

 

[ranger1]

you could always just run full out down hill, that should gain ya some top end... sorry, couldn't resist. I see it as when the clutches are at full shift then there is no more, I could totally be wrong, just guessing, maybe there is some shift left from stock? I don't understand how a kit could gain you top end but if Allen says it does than it does...

Brian, if the clutches are shifting right out then you definitely can gain by upping the gear ratio (taller gearing). The problem is that probably about %95 of the time the conditions won't allow for full shift out because you would either have to be on a ice road or "full out down hill!"hahahaha. Many tuners believe however, even though full shift is rarely achieved, one can gain top end with higher gearing regardless of full shift or not, as long as the sled has the HP to pull it.

 

[ranger1]

I'm my experience none of them give you any top end gains...You get faster from top to bottom but won't gain anything on top for speed. In alot of cases you actually lose top end. I ran with 3 buddies all the same sleds, 2 were clutched 1 was stock. We ran 10 miles on lake and both clutched sleds pulled out to a lead but after 2 miles the stock-er passed us both up top!! It's all what you want and I wanted faster corner to corner speed rather than top end. You want more top gear it higher..

So if I am happy with the current corner to corner acceleration & am only interested in gaining in the top end, a clutch kit would be a waste of time & money for my needs. So I should maybe concentrate on gearing it up a bit instead? The 07 RTX is geared low, 22/38, so there could be some speed to gain by going up a gear or two!
Thanks, I think I am getting somewhere!! Wuhoo!!!

You are right in that the attak is a strong, fast runner with the 23 on top. The skid definitely makes a difference as that is why the attak, being a long track and all, is faster than the short (121) track.
I put a marginal snow wheel kit in the front where the hyfax was wearing as well as shortened the limiter strap, seemed to make a big difference.
So you don't think going larger on the top gear would help my sled? I don't want to buy the gear & 70L chain if it wouldn't make the sled any faster.
It would be nice to hear if someone geared up an RTX that had the 22T stock to a 23t or 24t and did a comparison.
If there is any RTX riders out there that did this? I would be very grateful to here your results!!
Thanks

 

[ZapeX2]

Ranger1, that's what I said basically. I don't think you are going to gain much if any top end with a kit. If you have the hp to pull a taller gear then yes but with just a kit I doubt it, but will get ya there quicker. btw... I've had 2 Ulmers kits and they are great....