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Post by weverat on Jan 28, 2023 19:30:37 GMT -5
Looks like i posted the pic 3 times, click on the red hyper link.
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Post by weverat on Jan 28, 2023 19:29:09 GMT -5
Walbro WF.docx (159.81 KB) Walbro WF.docx (159.81 KB) Walbro WF.docx (159.81 KB) Is it a Walbro WF I tried to post a picture of the needle and seat, but you can google Walbro WF diagram. You will see there is a small rubber gasket below the needle seat. Often stuck to the carb body when you remove the seat.Then when cleaning the carb body with compressed air etc, it gets lost.
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Post by weverat on Jan 14, 2022 20:03:38 GMT -5
Oh Ya, still here, just have not been giving the new guy's shit like I used to. Hoping to start in on somebody soon !
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Post by weverat on Mar 21, 2020 12:39:53 GMT -5
Where have you been racing at, and how do you get that Ol Scorp to turn?
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Post by weverat on Mar 20, 2020 7:12:23 GMT -5
Looks like a great project, what engine are you using, I suggest Yamaha SRV 540 or Skiddoo 503 Either that or a nice little Sachs single.
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Post by weverat on Mar 18, 2020 20:42:32 GMT -5
yes, i am the only guy that ice drags scorps around here. The problem is there is no room for studs.
In oval racing your studs must not hang past the track lug more than 3/8" That is normally not a problem for a scorpion.
In drag racing we are allowed 3/4"
In order to make that work in a scorp, you have to re-locate the drive shaft.
Now, drag racing on grass is a another story. Around Minnesota, the Scorps dominate on grass.
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Post by weverat on Mar 16, 2020 19:39:24 GMT -5
Hey Admin - You guy,s race scorpions out East?
I am working on getting some shit going on here again.
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Post by weverat on Mar 16, 2020 19:33:56 GMT -5
My super looked the same as yours. I wound up using a reproduction hood from Jack, Not sure if he has any left. The thing is, it is kind of cool to use the original, saving all that patina! Them fukin Supers were there own thing ya know, different skis, spindles, pipes, engines etc
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Post by weverat on Mar 15, 2020 21:27:38 GMT -5
Nice find there sd, the one with the little hoops or stanchions for the tuner pipes is a Super Stinger.
The other one is a 71 Stinger,wedge shaped hood, used a fan cooled engine. Does that round decal say Super Stinger?
By the way, the big bumper on the back of the Super actually is in good shape, those are impossible to find. At one time Jack had a few made, and I think he sold them out.
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Post by weverat on Mar 15, 2020 21:08:11 GMT -5
I wound up having to make a you tube video, then simply copied and pasted the link here.
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Post by weverat on Mar 15, 2020 20:58:50 GMT -5
1 more try
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Post by weverat on Mar 15, 2020 20:53:01 GMT -5
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Post by weverat on Mar 9, 2020 21:32:39 GMT -5
ok, we need pics. click on reply,then in the upper right hand click on "Attach Image", Grab photos off your computer and insert them. You can only insert 2 or 3 at a time.
These pics will be small, but we all know if we click on them they get bigger.
We need to see these old Supers!
Welcome to the sight
WeveRat
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Post by weverat on Mar 9, 2020 21:24:04 GMT -5
I did not upload them as a video, but will try again some day.
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Post by weverat on Mar 5, 2020 14:19:42 GMT -5
By the looks of that chain case, you could probably use a later style driven pulley too, that will make it run good.
The CCW is a good idea!
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Post by weverat on Mar 3, 2020 6:45:42 GMT -5
Yes, that is a good idea, those gaskets are definitely brittle, especially now that they are 40 to 50 years old.
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Post by weverat on Mar 2, 2020 22:21:03 GMT -5
I am trying to insert a couple short videos. Testing, testing Anyhow, we had a good time with the "Old Scorp"
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Post by weverat on Mar 2, 2020 21:43:18 GMT -5
Wow, very cool, have had it running yet.
Good to have some shit flying on this site again!
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Post by weverat on Mar 2, 2020 21:34:31 GMT -5
The cuyuna manual suggests adding another base gasket. Sometimes it takes 2 or even three base gaskets. Of course this raises the exhaust port timing, but not enough to actually make a difference.
If you have an assortment of head gaskets, you could use the thickest one.
I ice, and grass drag old Scorps, and never have a problem, but only go 500 feet. The Cuyuna's do not like to be run hard for a long distance, like for instance across the lake, or on a smooth trail. If you work them hard continuously for an hour, they will burn a piston.
Oh, another thought, you know the little tin welch plugs on each side of the cylinder. Cuyuna milled the transfer ports through those holes, and then plugged them with the welch plug. Well,I have found those plugs to be rusted through with little pin holes, and I burned a few pistons before discovering this. Now days I slather those little bastards with epoxy, and then sand the epoxy flush with the cylinder.
The epoxy must be flush,because the cylinders fit almost tight against each other.
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Post by weverat on Mar 1, 2020 20:36:11 GMT -5
Hi Kerry, Yes, the pto side is notorious for over heating. Here is a thread that shows all the venting used on the late model Stings and TK's scorpionsleds.proboards.com/thread/691/1979-tkx-hood-vent-updateLong story short, cold air vented into fan, warm air vented out from under hood. You seam to have covered all the standard things that help, B9 plugs, back down the timing, carb on the rich side, etc. Another thing that helps is to keep the compression down to about 120, and you could wrap the pipe to help the heat out from under the hood. Also some of the guy's run .005 piston clearance on the mag side, and .007 on the pto. One more thing, be sure the free flow head is on the mag side in order to let the fan blow through to the pto side. I am sure you have covered all the bases, just brain storm-in here. Don't give up on the cuyuna, they are great engines!
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