2010 XF8 clutching?

bacobits · Nov 24, 2009

The clutching chart under the hood for 9000' and above is all wrong. It came with 58g weights and black/orange spring, that put engagement at 5000rpm. Cat said that was at least 1000 too high.
Under warrenty they went to 63g's and yellow/white spring, now it engages about 4000 which is fine, but it peaks at 7900, lost 400rpm off the top. Any xf8 owners with an idea? This is for 2010, 141 powerclaw, 9-11000'.
AC is covering all this so I'm not going to buy adjustable weights yet. Thx for help.

cheetah · Nov 25, 2009

Are you talking about the XF clutching, I dont believe a M came with a 141" track

bacobits · Nov 25, 2009

2010xf8sp

Yes, 2010crossfire800sp. The m's are clutched and geared different than xfires, xfs run 060 belt instead of the 047 which is on the m's
It seems AC is just guessing with set up, I was just wondering what 09 xf8's had for weights and springs. THX.

CRJPilot · Nov 27, 2009

bacobits said:
Yes, 2010crossfire800sp. The m's are clutched and geared different than xfires, xfs run 060 belt instead of the 047 which is on the m's
It seems AC is just guessing with set up, I was just wondering what 09 xf8's had for weights and springs. THX.

I commented on your post on HCS, you can see the 09 set-up by going to the online parts diagram websites. I rode with an 09xf8sp last year in togowtee and used arctics recmnd clutching for 9000+ and it ran perfect.

Now for 2010, who knows, I was hoping to get lucky and have it work out for me also, but doesnt sound like it will. Do you think the Powerclaw 2.25" vs. stock 1.5" cobra is making the difference? although track lug height wont affect your engagement of over 5000rpm as you stated.

bacobits · Nov 28, 2009

2010cf8

I could see how the powerclaw might rob some r's off of the top, but I never rode it with the cobra so I can't compare. Then again maybe all it would do is rob some top end speed. I know it's only 400 rpm but from what I understand that is where the peak hp is, the sled is damn fast now.
My dealer is waiting to hear back from AC as to what their next idea is. They are covering all this under warrenty, at least it is early in the season.

Destroyer · Nov 28, 2009

I looked at the CF chart vs. the m chart and I knew there was going to be problems with one or the other. I have a 2010 cf snopro with a pclaw. Lets please keep in touch and see what comes of it. Home for me is at 2000' but I do put on just as many mountain miles (9000') as I do at home. Did you run the suggested 36 helix?

bacobits · Nov 28, 2009

2010 cf8

Yes it is the 36 helix. I too looked at the m's chart and was wondering what was up. They are totally different, clutching,gearing,belts. Wonder if cat geared the cf to be more of a trail blaster and the m has more low end grunt for boondocking. I have a 09 m8(my ride) and the wife and I were out last sunday(she rides the cf) and we were picking our way through the trees and there is a real difference between the 2 sleds. The new motor and "current" set up in the cf is MUCH more at home screaming down the trail.

bacobits · Nov 29, 2009

to destroyer

Destroyer, when I got my sled home I put it through a couple of heat cycles before I ever rode it. That is when I noticed a 5000rpm engagement. Check it and see, if it's around 4g's it's good.

Destroyer · Nov 29, 2009

Did heat cycles too. You can't go off track stand rpm. expecially a new sled the first time you engage it they seem to have high engagement.

the 2010 M to 2010 crossfire clutch charts are almost identicle.

the only difference is the XF has 60/60 gearing and the M has 55/65. and the XF has 5 grams LESS weight at every elevation. Helix and springs are the same.

I'm tempted to try 57/63 gears but I'll ride it first. Alot of tuners say I'll be happy with the 60/60. alot of riders say gear em down. Time will tell.

So cat will replace clutch parts under warranty on a new sled to get them running right? I hope my dealer will help me out with this.

bacobits · Nov 29, 2009

Cat made the 1st change with no problem, still waiting to hear back about next move.

Destroyer · Nov 29, 2009

I also noticed that on the CF chart for 0-3000 they recommend a 40 degree helix but the secondary is equiped with a 44/40. WTF cat. The M's have a straight 40 for 0-3000 according to the parts diagrams on babbits. The parts diagrams also show the CF with a 44/40. instead of the 40 they recommed on the chart???

Destroyer · Nov 30, 2009

ttt any updates on 2010 cf clutching at hi elevation?

Pieguy · Nov 30, 2009

Destroyer said:
I also noticed that on the CF chart for 0-3000 they recommend a 40 degree helix but the secondary is equiped with a 44/40. WTF cat. The M's have a straight 40 for 0-3000 according to the parts diagrams on babbits. The parts diagrams also show the CF with a 44/40. instead of the 40 they recommed on the chart???

If you are riding this sled at the 0-3000' elevation the 44-40 helix works much better. I don't have any idea why the chart says 40.

bacobits · Dec 4, 2009

Ran it yesterday with 61g's, pulled about 8100, getting closer. That was with yel/wht 122/285 spring. My dealer got a note from ac stating that consumers looking for more of a deep snow application should regear from60/60 to 57/63 or even 55/65. This is a rider option and not a warranty issue.
So now I wonder if you regear, is it back to square one with the clutching? ROUND & ROUND we go!
Part of the "fun" I guess.

Destroyer · Dec 4, 2009

I was thinking about changing the gearing. I wonder what I should go with? How would someone get a hold of these guys at cat who tell the dealers what to do?

Destroyer · Dec 5, 2009

our dealer said that flatland guys are having issues with belts blowing at high speeds on the 09 m's. Clutches are over shifting do to the lower gearing. I can't see the 2010's being much different with the 55/65 gears. But I never ride wide open high speed runs so it shouldn't be a problem to gear down. I think I would probably go with 57/63 gears. There is quite a bit less track on a 141 than a 153 or 162. I'll try it at 60/60 for one trip out west first and see how it does.

Could a guy make a bushing to put in the spring cup like the doo's to prevent pushing the belt up to high?

bacobits · Dec 7, 2009

Gearing down and high-speeds are not a good combo. In the note from ac to my dealer they suggest taller gears like 62/58 or 65/55 for high speed. I'm not looking for high speed, want more low end grunt. Getting close on the clutching. Rode with 2 2010 cfs this weekend, one was stock and one dumped the 58s and the blk/org spring. He put in 63s and a blue/silver 140/300 slp spring. Made it a much better ride, gonna try even a little more weight and spring this coming weekend.

Destroyer · Dec 7, 2009

your gearing is still 60/60?

bacobits · Dec 8, 2009

Still 60/60, it's probably inevitable, but I'm going to see what we can get with clutching changes 1st.

2010 XF8 clutching?

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