Anybody ever try these? What did you think if you did? What do they mean by very aggressive?

I usually just get Cat ones but was thinking of trying something different.

http://www.blackmagicracing.com/2003Pages/...hiftweights.htm

I have used them, very good weight but needs to be modified for your own taste, The aggrassive part is the take off, they have a deep notch and really jump out of the hole, and raises the engagement alot, truely a race weight, not much good for trail driving, to jumpy.

OK thanks ready2race, that's kind of what I thought they would be like. I'm not sure if that's what I'm looking for or not, I'd like to try some, but I don't know if I'd like that all the time. They might be nice for playing in the deep snow????? I might order a set and see.......should I stay with the same grams I'm using now, I guess what I'm wondering is will these ones keep the same max RPM as the Cat weights, just launch harder at engagement?

If you stay with the same weight, top Rpm should stay the same, I never seen any difference there, But very wicked engagement, They worked great on very hard packed snow, Deep snow I think it would engage to hard and spin, I ruined one set trying to grind some of the notch down, My mistake was not getting heavier ones, by the time I was done they weighed the same as the ones I took out, And also messed up my engagement by a few hundred rpm, I ordered the second set a few grams heavier so I had more room to play, but there only good if you have decent traction. They are a hard weight to make work. :tease: Not trail friendly at all.

Yeah maybe they're not what I'm looking for then, if the engagement is that hard. I'd like something a little more agressive than the Cat arms, but not too much. Did you ever try D&D's Big Dog weights? I see they have 2 profiles available, one notched and one not. They don't really say anything about them on their site though.

I don't really think you would like them, they would drive you nuts on the trail,depending on your engagement, it's more over rough going where your driving at lower speeds, MY problem was the sled engages at 5000, and would kick out below that, but it still would kick hard even lower engagement with the notch. I never tried the Big Dogs, but have thought about them since they have both kinds, looking for something in the middle, I also don't know if I want to waste any more $ on this sled, Hoping to not have it after this year.

I've never used a notched weight, but I think you're right, it would probably drive me nuts when just trying to crawl around in the bush or whatever. Maybe I'll just stick with the Cat stuff. I need to pick up a new set for my Powder Special and I was just thinking of maybe trying something different. I have 49's right now on it and it wants to over rev a little on top, so now I'm going to go a little heavier, Cat recommends 50 grams. It needed a new clutch and I had one here set up for a 98 ZR 600 so I just threw that on last spring. Now it's time to get it set up right for this sled.

Using them since '97 for different sleds, good weight. You'll only need 120-130# engagement on your primary spring and you'll want to put them on a grinding block to smooth the edge of the engagement notch slightly. You'll still get healthy engagement but not quite bang as hard when you come off that edge with the roller.

Ran them last season (and will again), the engagement is pretty high, very fast out of the hole. Big change over stock, but they can easily be trail rode, once you get moving you will forget they are even in there. :beerchug:

To creep around or load onto a trailer, the throttle just has to be feathered, not really a big deal.

It does depend alot on your engagement, At 5000 rpm it's just not trail friendly, down under 4500 might be better , but if you plan on running them and grinding at the notch, get them a couple grams heavier than you need, can always lighten them, but you can't make them heavier.

Did you try a Polaris weight yet? That might get you where you want to be without the hard hitting engagement. You can try some 10-50's

Touching the edge of the notch to the sanding belt takes less than 1/10 gram, no need for heavier weights.

I have already done that, if you want a decent engagement you need to take a good amount off them, the notch is deep, pretty much ruined one set over it, and if the area ground is off slightly ,expect premature roller wear.

I tried pol weights back a few years ago, didn't have much luck with them, seemed to throw my clutching all off, I haven't tried some of the newer ones, may look in that direction again. Not going to play much longer with this sled anyways.

i have had good luck with polaris weights. engagement at 4500 a good grab but not to hard so you sink to your running boards

I need aleast a 5000 engagement, and no higher,and has to run down to about 4500 without kicking out for trail riding, this is where I get into trouble, trying to find something that will work, the current set up is the best I've struck, I might pick up a couple set of pol weights and play some more if I get bored this winter.

yea my setup is for a quick back shift and holeshot, 54 weights, orange white primary, green snopro secondary with a cat 57 50 helix. works great for back county.

the po wieght seem to back shift better because less weight on the tip when compare to a cat. i've ran cat 54 and 54 rev knotched wieghts. the knotched ones were fun but i burned up two belts with that trying to put around.

i've read on here that some guys are running 53 gram wieghts for 600s also. to get that 5000 engagement. not sure if it was po or cat wieght

if you use pol weight remember to grind the heel off or your primary wont open all the way.

Yep,, that's what I found about them , Different rpm on the top because of the tip, could work in certain places, I did consider the 600 weights but never tried them for some reason, notch is hard on the clutch with the quick engagements.

Do you guys know why the factory set ups are quite a bit different between the same models of EFI's and carb sleds? I noticed for the PS, the carb model runs heavier arms and a different helix.

I'm supposed to run 50's (0746-587), the carb model runs 52's (0746-609) with more weight at the tip of the arm. I was thinking of trying 52's in mine but go with 0746-592 because it's got a more similar profile to the 50's they recommend. Then I would run a orange/white spring. The heavier weight should bring my top RPM down where I want it, and the heavier spring should keep my engagement where it is.

Idon't know, I guess I just need to try a few things here and see what works.

I don't really know why that would be, most are the same or I always thought that, I could see if it was for altitude or something. Playing is about the only way to know for sure. :div20:

it could be for different elvations that the sleds are set up for. generally the higher the elevation the less clutch weight ran.

springs get a lil confusing because of the the preload and collapse load.
like ready2race said, just play with it.

I don't take any off other than smoothing the ridge, 4500-4600 engage with a yellow/white or 4800-5000 with a BM black/orange. If I need more or less I'd change the spring again or change the shim stack rather than torch a set of weights.

I was already running yellow/white, engagement was 5600, couldn't just shave the edge off, it was to deep, had to smooth it off gradually, tried doing a little at a time, like I said, The notch was the only part ground, by the time I got it back to 5000 without the sharp engagement ,The weight was back to the same grams I already had, So the second set I ordered heavier to account for what I needed to take off, worked much better.

Both B-case motors but carb had a bigger pipe, EFI didn't get it until 2001 when EFI was recalibrated.

OK that makes sense, thanks alot.
:beerchug: :beerchug: