Cyclone does not shift

[shrike66]

Hi all.

I am in search of information and parts.
I recently acquired a 1976 340 cyclone. The sled appears to me to be a real survivor, nothing looks to have been molested!
After removing the vermin nests etc. I cleaned the carb and tank. Was pleasantly surprised at how well it runs. I ran it with the belts that came with it and it did not shift. I purchased a new belt, installed new slider shoes on the secondary and it did make an improvement, however it still does not up shift right. It will gradually shift on a hardpack such as a road.
The secondary does have some slop in it and I have done nothing with the primary. I should note that the engine doesn't bog, just the opposite. I would like to know if someone could tell me where to find new bushings for the secondary. .
Also, the primage is enclosed. Is this a john deere clutch? If so are parts available for it? Or would it be best to dump it for a comet?
Thanks in advance!!

[JDT]

It should have a Comet on it.

Did you preload the secondary when you replaced the shoes?

What about crank seals?

[shrike66]

Crank seals are in the mail. Yes, the driven is preloaded. And you cannot see the spider etc. on the primary.

[HoosierDeereMan]

Your primary clutch even though it has John Deere stamped in it is a Comet clutch. It should be a 102-C Clutch. You need to look into the rollers and clutch weight arms in the primary. Sounds like a roller is locked up or a arm has a groove worn in it causing it to bind and not shift correctly.

Troy

[jep_800]

I agree with Troy. The clutch is a 102c with the can on it . Later, they removed the can and came with a steel cover plate that is "open" so you see the spider, rollers, arms, etc.

It must be binding up, so you'll need to remove the can to see what's going on in there.

JP

[shrike66]

Thanks to both of you! I didn't know that comet did that with their 102!!
Since parts for the 102 are readily available, that is no longer a concern.
Are bushings for the driven available?

Thanks again!

[shrike66]

I should have thanked Todd as well! Sorry for the oversite!

[jep_800]

Yes, I just rebuilt a Comet 90D secondary... although I think the Cyclone and Liquifires have a different secondary by Comet. I believe they have two bushings, two shims and a "blue" spring? Not quite sure on the spring. Helix ramp buttons should be available too. Most of those items can be sourced through New Breed Parts, Busco Bullet, Dennis Kirk, Pat's Small Engine, MFG... probably others.

Jason

[shrike66]

I believe that your exactly right on the components! I didn't see parts listed for a comet secondary in in dennis kirk.
Never heard of new breed parts, Busch bulletpats or manufacture supply before I ran across this site...Thanks again!!

[shrike66]

Would anyone happen to know if you can remove the 'can' on a 102c and run it?

[HoosierDeereMan]

You can remove the can and be just fine. They only used the cover for a short time. It was found that it trapped belt residue and also increased heat in the clutch.

Troy

[jep_800]

I will revert back to what Brian Linder has said many times on this site. Now, I'm not sure which bushing they had for that cover plate, but in a 101c (also with the can), they had a "minlon" bushing, which is a hard plastic. That bushing is sandwiched between the can and the aluminum cover plate. So if you remove the can, your spring will be pushing directly on the bushing. Probably would be prone to fail. So if the can is removed, you should replace it with a steel 102c cover plate with the staked-in fiber bushing. That plate is meant to have the spring resting on the back of it. Need to check that before you decide to ditch the can.

[shrike66]

Thanks again guys for the information!! I'll take a look this weekend and see what I see.
I know the primary needs a rebuild so after I get the crank seals in that will be next.