CPP taper cluth adapter dimensions

royale with cheese

I'm considering the CPP taper adapter to mate a Polaris P90 clutch to a 1" Clone shaft but want to check the dimensions to determine if I need to cut my shaft or not. anyone have one they can get some precise measurements from? I'm not trying to make my own adapter, just ensure that the one from CPP will work before I buy it.

Thanks

BGW

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roady89

You dont need an adapter. You can machine the Polaris clutch for straight shaft. Thats straight from polaris.

CPP's adapter is for tapered to straight, not straight to tapered.

roady89

Straight from Polaris

royale with cheese

Thanks! Looks like I'm headed to the machine shop!

roady89

Its better to do it that way than use an adapter.

sho305

I don't think it matters that much since most lawn engines are lower rpm. All the adapters used here seem to work fine. The adapter is about the same size as the taper it fits flush with the end of the clutch, well a yami clutch where the taper is right at the rear of the clutch. This requires you to cut the crank off and drill/tap the hole if you want to keep the clutch close to the block like they should be, though some run them out more or have room to do so. In a G9 you have to mount it close I cut the crank to 1.125 long so the adapter would sit on the shoulder of the crank as close/short as possible. The adapter is 1" long and sits flush or just inside the clutch. You can't leave more than 1/8" beyond the adapter or it will not tighten down.

invalidsession

Hi Sho, you seem to have considerable experience of clone swaps judging by the posts I've seen on the subject but I could use some clarification since my clone (Duromax) has me wondering; The Duromax has a shoulder off of the crank at approx 1 1/8" before the 1" straight shaft comes into play. Ideally I would prefer to get the clutch as tight to the case as possible to reduce the torque and imbalance that results from "hanging" the clutch out from the center line. The CPP adapter will get the job done but after cutting the shaft off to suit I will still have this 1 1/8" overhanging length before the clutch and SG generator are mounted. Is this ok ?
Thanks in advance for your thoughts.

Chris.

sho305

People do it and it seems to work, but from what I know about sleds its not a good idea. Its that big? My clone was around .5" of shoulder the rest was 1", so its fairly close. I put the adapter against the shoulder and it actually goes into the clutch a little, so the back of the clutch is just a little under the shoulder length. I would not like half the shaft over 1", that is not right. I only cut near 2" off to get it mounted like that. It is a carolstream clone, had 1.125" of 1" showing for the adapter to go on. My problem was this is in a G9 yamaha, and it just barely fit. If the clutch were out more I would have to take the recoil off, and the carb is very close to the shock as it is.

Don't have a good photo but this gives you an idea. The clutch looks like it is away from the block but it is not that far the bearing sticks out some and the bolt holes step back on the outer ring (in the block cover).

invalidsession

My Duromax is going into a GEM cart and will mount 180 degrees opposite to yours to connect with a Club Car rear end. (Cylinder head forward) Thus far it's looking good but that crankshaft off-set is giving me coniptions. As an engineer I hate to have that overhang since to my mind it's going to put a whole lot of strain on the crankshaft bearings but I just re-measured with my long lost vernier caliper and the overhang is actually 7/8" Bloody beer goggles I hope this is acceptable because short of having the shaft machined down and voiding the warranty i'm screwed. I'll try and get some pictures up shortly but in the meantime I appreciate your comments. This is an interesting project in any event and should make for a unique looking golf course ride

Chris.

sho305

There are photos here of my crank, you can see about 1/2" shoulder but I did not measure it. At that shoulder it is pretty close it works fine. The adapter does go into the clutch some so actually the clutch overhangs the shoulder a little.
http://www.carrollstream.com/16HP_Ga..._p/cs190es.htm

That machined circle around the crank bearing with 4 bolts is about flush with the crank bearing but the other holes are not as close to the clutch, so a photo from an angle makes the clutch look like there is more clearance to the block.