cat clutch advantages

[dobson]

my primary on my mountain cat is getting tired. is there a performance advantage with the new style with set screws? how about the one that uses 4 weights?
i have a huge collection of old style weights so i would like to stay with the old style clutch but not if there is some performance to be gained going to the new style. i was even considering machineing a p85 to fit but i don't think thats worth it anymore.

 

[diggerdown]

The fixed pin clutches do not have the problem of wearing the weight bushing out like the older clutches.

 

[Arctic Thunder]

The fixed pin clutches do not have the problem of wearing the weight bushing out like the older clutches.

This is a huge advantage. The old style needed new weight bushings every 3-400 miles. You can easily get 1000-1500 on the set screw style.

As for performance. I think the old style worked a bit better, the weights moved better. But I would give this up any day for a clutch that didn't need to be worked on every third weekend.

Thunder

 

[Idcatman3]

I'll agree with what they said, and add that the 4 weight clutch that came on the '07 M1000 won't fit on anything but the 8/1000 laydown motors. The PTO end of the crank is different.

 

[dobson]

I'll agree with what they said, and add that the 4 weight clutch that came on the '07 M1000 won't fit on anything but the 8/1000 laydown motors. The PTO end of the crank is different.

i would imagine they can be machined. last year i had a tra 3 for a couple of months. i had to do some minor lathe work and built my own puller but it was quite simple.

 

[Idcatman3]

i would imagine they can be machined. last year i had a tra 3 for a couple of months. i had to do some minor lathe work and built my own puller but it was quite simple.

From what I understand, you'd actually have to build a bushing or something to put on the end of the crank or inside the clutch. The clutch bore is larger than the PTO end of the crank.

I actually think that the angle of the taper is the same, but if you tried to put the clutch on your motor, it would hit the case before it tightened down.

The 8/900 cat motor (after '01) has a PTO taper that starts at 33mm, I believe that the 800/1000 laydown starts at 34mm.

(I could be wrong, I just know it is different.)

 

[krom]

The 1000 has a 35 mm taper, the 600, 700, and 800 laydown engines all use the 33mm taper, cat has discontinued the 4 weight clutch, and neither parts or clutches are available.