dantheman
L1 Scorpion - The Great Snowmobile
Posts: 14 
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Post by dantheman on Nov 13, 2017 21:49:42 GMT -5
Hello everyone, This is my first Scorpion sled so please bear with me. 1. I just realized the sled has zero rear suspension, I believe the rear shock and spring are probably shot, are these parts still available? if so where? are there alternate parts that will work? 2. The motor idles too high, what is the Mikuni carburetor screw adjustments? if it's the throttle cable, how do you adjust so the engine idles correctly? Help  |
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Post by 80sting440 on Nov 14, 2017 9:07:55 GMT -5
Hello Dan!
Welcome aboard. Why don't you take a little bit of time to tell us about yourself, your interest in vintage sleds and why you chose this Sting? (this way we feel a connection with you and are more apt to want to help)
Your carb idle speed screw is on the left side in the middle. Use your fingers to turn it out (or in) until you reach desired rpm. The other adjustment screw is just to the left of it. It's the idle air mixture screw. The idle circuit has a set amount of fuel metered with a variable air screw. Have the engine warmed up and idling. Turn that screw clockwise slowly until the rpm just start to drop. Turn it back out slightly until it picks up speed again. Play with it until you're comfortable with that sweet spot...that setting will vary with outside air temperature...readjust when there's a fair bit of temperature change. Usually 1/8 turn either way will do.
scorpionsleds.proboards.com/thread/1666/sting-para-rail-iii-upgrade
I upgraded my suspension with a new spring/shock. It's a nos Comet unit that can be rebuilt. I got it from Don Soukup (Dr. Mario) 920-743-7660...he and his wife are great to deal with.
Let us know how things work out.
Rene
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Post by 80sting440 on Nov 14, 2017 9:33:08 GMT -5
Another area of concern with the rear suspension is that it has no grease zerks. This may cause your back end to sag without springing back up. You have to remove it and disassemble every season. Clean up the pivot point cross shafts and slather on some lube. Do the same to the other pivot points and to the spring rubbing surfaces...are we having fun yet?...welcome to old sleds!!
I've added some zerks to my other vintage and may attempt to do the same on my Sting this summer...maybe...
"10 hours of work for every hour of riding"
Rene |
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Post by 80sting440 on Nov 14, 2017 9:38:47 GMT -5
Dan.
You were asking about the throttle cable adjustment.
On top of the carb where your cable assembly meets the carb, there's a nut. Loosen it counter clockwise. This will give you more cable slack if needed.
Rene
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dantheman
L1 Scorpion - The Great Snowmobile
Posts: 14
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Post by dantheman on Nov 14, 2017 12:39:04 GMT -5
Thank you so much Rene,
I am a 54 guitar player/vintage snowmobile nut, I got into vintage sleds a little over ten years ago, I started caring for my mother which took most of my time, so I thought it would be cool to putz around with old sleds and get them going again, this I could do in the garage and still be close to mom, anyway, the nest thing you know I ended up restoring a half dozen sleds, old Mercs, Yamaha's, Polaris and Cats. One of my best friends turned me on to snowmobiling back in the 70's, he had a 76 Panther and Cheeta....I have regular newer trail sleds which I ride near the IL/WI border, I cross the state line and back.
Right now I am working on a 69 Oly 12/3, 78 440 Exciter, 77 Panther 5000, 1970 Panther 399 Kohler which all I have left to do is replace the Walbro carb with a (Tillotson HR49a) and I just picked up this 440 from Craiglist for $250, the guy I purchased it from properly stowed it so it didn't take much to get it to run....I always liked how the the Scorpions looked and I never heard anything negative about them, I've seen many at A-1 and Waconia.
I love the simplicity of vintage sleds, I also like the idea of riding over snow vs riding through it like my four stroke does.
Dan
Thanks for the 411...I suck at carbs, but I am good with pretty much everything else pertaining to old sleds.
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Post by 80sting440 on Nov 14, 2017 13:15:02 GMT -5
You're welcome Dan.
It's good to know who we're talking to.
Knowing your skill level helps us help you.
I've now got this mental image of you being stranded out in the boonies, because of a burned piston, not sweating the "little stuff", just strumming that old guitar and singing a sad country music tune;
"My baby Sting has left me, stranded in the sticks, just 'cus I am, an ol' country hick."
Rene |
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dantheman
L1 Scorpion - The Great Snowmobile
Posts: 14
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Post by dantheman on Nov 14, 2017 16:50:14 GMT -5
Haha! I do not venture far from civilization when on my own, besides I am a classic rocker/blues guitar player....I do love acoustic and I have some very expensive ones, I have a huge collection of electric guitars and amps as well, a collection most rock and country music guitarist would drool over....I am a very sick collector in that regards....I also buy and sell, fis up and restore guitars and amps.
I haven't played much since my mother passed away (September 2016) she was my main inspiration in life, but I am now beginning to play again, I had stopped with the vintage sleds as well, but it's coming back again.
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Post by 80sting440 on Nov 14, 2017 18:46:48 GMT -5
Sooo...what you're saying is, between all of that rock 'n roll and vintage sled, your hearing is shot?
I just got a set of custom made musician's ear plugs for riding. I had to take a decibel reading of my seating position on my loudest sled and they inserted a filter in my earplugs to bring the sound down to 83 Db...should of done this years ago. They told me that I'd be safe at this level for up to 10 consecutive hours. I told them that on a vintage sled, I'm lucky to ride for 1 hour! 
Rene |
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Post by weverat on Nov 14, 2017 20:22:18 GMT -5
Rene, your going off the deep end ,you need to start another sled project, maybe go for those grease zerks.
Better yet, find an old tunnel mount Stinger, junk out the old CCW and stick a 503 in there, add a bunch of studs, carbide runners, and go raise hell on the lake!
oh ya, Dantheman, welcome to the site
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dantheman
L1 Scorpion - The Great Snowmobile
Posts: 14
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Post by dantheman on Nov 14, 2017 20:34:24 GMT -5
Well due to rock'n roll, being gooped up on gop, drunk, very dumb (my hearing is shot to hell) seriously damaged, so I have been a a couch potato rock star since the age of 27, the same year I quit smoking, drinking and staying up late I also had to disassociate with the majority of my friends. Vintage sleds is a much healthier hobby. I checked out the Paraslide III setup and noticed a lot of rust, the bogies look okay, I put a jack on the rear and raised the track off the floor, I went ahead and WD-40'ed the entire assembly and pushed the track down where it should be if the suspension worked. The drive shaft is very rusty, but more alarming is the coggs have wear on the inside arms/spindles as if the track nubs are causing friction / eating them up/wearing them down....I forget the term for that? The sled has just over a 1000 miles and the wear isn't bad enough to replace since I will only be trail riding, but I must do something to ensure they do not receive further wear....Now I must remove the drive and and track system and do as you mentioned. It doesn't look to difficult.. If you do not mind me asking, approximately how much was that shock and spring setup you purchased? having no suspension could be the cause of the cogg wear? |
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Post by 80sting440 on Nov 14, 2017 23:40:31 GMT -5
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Post by 80sting440 on Nov 15, 2017 8:09:18 GMT -5
Rene, your going off the deep end ,you need to start another sled project, maybe go for those grease zerks. Better yet, find an old tunnel mount Stinger, junk out the old CCW and stick a 503 in there, add a bunch of studs, carbide runners, and go raise hell on the lake! oh ya, Dantheman, welcome to the site I'm afraid that I fell in a long time ago 
I don't know about an old Stinger, but I am giving some thought of putting a Rotax 503 into my Sting.
Now that I have mine (503) pulling over more easily, I really like it. My crank guy had placed the centre bearings too tight against their side retainers, thus causing great friction within them...couldn't pull it over in the cold! While I had it apart I got a rebore with new pistons and it works great.
A reliable Rotax vs. a known self destructive Cuyuna...hmmm
You're giving me food for thought...
Rene
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Post by weverat on Nov 15, 2017 15:26:26 GMT -5
The 503,s make good power, and they have twin carbs. I do not know how well it would fit in the sting, and the pipe would have to be adjusted, or maybe modify the exhaust manifold and use a Sting pipe. Of course the next problem is getting all this to fit under the hood.
Dantheman - By all means check out the links to the threads within 80sting440's post, if you click on the pictures they get bigger.
I have an 80 Sting which is chewing up drive wheels, and we think the problem with mine is it has an aftermarket track with the word Quimpex stamped in it. I am thinking we need to find the right track, otherwise I might convert mine to a Para-rail from a Whip, which might be a problem because I think the Whip track and suspension is a bit longer?
80sting440 has his Para-slide working really nice.
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dantheman
L1 Scorpion - The Great Snowmobile
Posts: 14
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Post by dantheman on Nov 15, 2017 18:30:34 GMT -5
The 503,s make good power, and they have twin carbs. I do not know how well it would fit in the sting, and the pipe would have to be adjusted, or maybe modify the exhaust manifold and use a Sting pipe. Of course the next problem is getting all this to fit under the hood. Dantheman - By all means check out the links to the threads within 80sting440's post, if you click on the pictures they get bigger. I have an 80 Sting which is chewing up drive wheels, and we think the problem with mine is it has an aftermarket track with the word Quimpex stamped in it. I am thinking we need to find the right track, otherwise I might convert mine to a Para-rail from a Whip, which might be a problem because I think the Whip track and suspension is a bit longer? 80sting440 has his Para-slide working really nice. Thank you, Wow 80Sting440 did an amazing job with the cat drivers, I wish he had video taped that mod. 440Sting used Yamaha SS drivers, probably not as good as the mod 80Sting440 did but seems like it would be an easier fix....hard to believe all Stings have/had the same issue, I am tempted to find some aluminum sleeves to slip over the worn drivers. Thanks guys Dan |
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Post by 80sting440 on Nov 15, 2017 22:40:31 GMT -5
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dantheman
L1 Scorpion - The Great Snowmobile
Posts: 14
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Post by dantheman on Nov 16, 2017 10:37:05 GMT -5
Seems to be direct replacements, I think I will pounce on two. Thank you Rene! |
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