Max 8x8

[JoeMeg]

Brilliant! Tag teaming an AATV build,I like it!

Joe.

[MAX IV Mark]

I am looking for some guideance on clutch setup. If any of the members that have gone through it could give some input it would be appreciated.

First I need a secondary clutch that will switch the offset on the belt.
(thebuggyman1 photo of stock secondary)

To something like one of these (thebuggyman1 and spookum photos)


This needs to be done to move the belt away from the tub on the MAX so I have room for the primary clutch.
spookum had mentioned that the Polaris Clutch had a wider ratio than the stock argo, I liked that.
Would anyone know what Polaris would fit a T20 7/8" (.875) input. I asked about one on ebay like spookum's and they said it was a 1" shaft. I would like to start with a cheap used secondary so I can get started fabricating motor mounts.

Next question is about Primary clutches. I have to make an adapter for my engine so shaft configuration is flexible.

All the clutches I looked at good for 100+ HP have been for two stroke with a high engage speed, like 1800-2500rpm. I want something in the 1000-1200rpm engage. I noticed Arctic Cat had some larger four stroke machines, I wonder if one of these would work.

Any advice is appreciated

Thanks,
MAX IV Mark

[Mike]

I'm not sure how much room you need with that motor but does it help if you flip your clutches around and just run them backwards. That should allow you to run the belt closer to the T20 which should allow you to slide the motor over and gain a little more room for the primary clutch. Also, depending on how much more room you need and where the primary will hit the tub, you can just remold the tub. I did that to fit the engine down in my Max IV. Whipper did the same thing with Goliath I believe.

[coosaridgerider]

What type of polaris clutch are you looking for.I have a couple off a polaris sportsman 500.

[jerseybigfoot]

here is the Polaris against the Salisbury

Polaris P85 sleeve for 7/8 T-20 shaft

[micmac]

Marc,

The Polaris clutches are all 1" diameter shaft as JBF shows he used a sleeve to mount it to the t-20. I'm not sure on the outer diameter of all the polaris clutches but the one I bought and can't use is over 10" so there would be a clearance issue with a Max frame unless you mounted the T-20 higher. Also flipping the clutches around would require the secondary to use the other ramp in the helix. Also you might need a reverse wound spring too. I'm dealing with the same issue with my max and dropping the engine to the frame. I think the best option is to use te invance secondary like Buggyman did. If you find a different solution let me know as I'm in the same boat.

Mike

[MAX IV Mark]

does it help if you flip your clutches around and just run them backwards.

I think if I could flip one it would line up nice, but then when it shifted to high , one clutch would try to move the belt right and the other would try to shift to the left. If I did both clutches, I think the engine would need to move too far right instead of too far left.

What type of polaris clutch are you looking for.I have a couple off a polaris sportsman 500.

I am still doing my research, not sure what I need yet. But I think it needs to be out of a high HP snowmobile to handle the 95 hp honda.

here is the Polaris against the Salisbury

Polaris P85 sleeve for 7/8 T-20 shaft

Good info, I was wondering about a sleeve. The ones I was looking at were split and the keyway key went right through it. But I didnt know what I would do about the shoulder it needs to butt against.
Engine Sleeve 2.20" Long to go from 7/8" shaft 1" including ste_ Sleeve-78-1x220 | eBay

Marc,

the one I bought and can't use is over 10" so there would be a clearance issue with a Max frame unless you mounted the T-20 higher.

Mike

This is going to be Mid Engine so the T20 is going to be far from its original position. Raising it up a little to clear may not be an issue for me.

Thanks for the responses. What I need to do is looking a little clearer
MAX IV Mark

[micmac]

Mark,

Couldn't you use a bushing to butt it up against the shoulder?

[MAX IV Mark]

I think you need to keep the sleeve tight to the shaft and clutch bore to prevent it from rattling and wearing. The sleeve that jerseybigfoot had there would prevent this by sandwiching them all together. Without that shoulder there is a chance you are clamping the clutch and leaving the sleeve loose, or clamping the sleeve and leaving the clutch loose.

I have been reading up on polaris clutch setups, here is some good reference material I found
http://www.vintagesnow.com/Polaris_f...5%20torque.pdf

http://www.snowestonline.com/forum/archive/index.php/t-175750.html

http://wiki.bssd.org/index.php/Secondary_Clutches

[MAX IV Mark]

Did some work on the project.
I got a primary and secondary clutch so I could work on engine alignment and mounts.

My High tech alignment tool making the bottom cradle

My parts notched, drilled and ready to weld

Since all the legs are different angle and lengths. I made a fixture that aligns and holds the cradle to the main bearing caps while I cut and weld the parts.

Welded up and test fit.

[amphibious drew]

Very nice Mark. We should be able to get some stuff done on it this weekend too. Your going to be needing to buy tires before you know it.

[jpswift1]

Looks good, Mark! Looking forward to seeing it in person.

[ARGOJIM]

Bump, looking for pictures, they've gone missing.

[hydromike]

Mark may have some pictures, but I deleted my album.

[amphibious drew]

I got some pics and video somewhere of us cutting apart a Honda Civic to get the engine out for the 8x8. I'll try and find them and upload at some point.